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Engine Control System 1A-47

On-Board Diagnostic (OBD) System Check

Circuit Description

The on-board diagnostic (OBD) system check is a
starting point for any driveability complaint diagnosis.
Before using this procedure, perform a visual/physical
check of the ECM (engine control module), VIM
(vehicle interface module), and engine grounds for
cleanliness and tightness.
The OBD system check is an organized approach to
identifying a problem created by an electronic engine
control system malfunction.

Diagnostic Aids

An intermittent may be caused by a poor connection, a
rubbed-through wire insulation, or a wire broken inside
the insulator. Check for the following conditions and, if
a fault is found, perform repair or replacement.

• Poor connection at ECM: Inspect harness

connectors for backed-out pins, improper mating,
broken locks, improperly formed or damaged pins,
and poor pin-to-wire connection.

• Damaged harness: Inspect the wiring harness for

rubbed-through wire insulation or wire broken
inside the insulator.

Test Description

Number(s) below refer to the step number(s) on the
Diagnostic Chart.
3: The CHECK ENGINE lamp (MIL) should be "ON"
steady with the starter switch "ON"/engine "OFF". If
not, "Inactive CHECK ENGINE Lamp (MIL) Check"
should be used to isolate the malfunction.
4: Check the data communication circuit and ensures
that both ECM and VIM are able to transmit serial data.
5: When pins are jumpered and the voltage reads 0 V,
the cause is open wiring. When pins are not jumpered
and the voltage reads 24 V, the cause is short.
10: This test ensures that the ECM is capable of
controlling the MIL and the MIL driver circuit is not
shorted to ground. If a problem presents, the vehicle
should be repaired using "Unblinking MIL Check".

ECM
(Engine
Control
Module)

CHECK
ENGINE
Lamp

LNW21ALF006001-X

121 120 119

95 87

118 117 116 115 114

113

109

0.25B

1.25B

1.25B

0.75B

0.5B

3W/G

2W/G

1.25W/R

0.5B/W

0.75B/O

1.25W/R

1.25W/R

0.5L/Y

99

0.5Y/B

0.5L/Y

0.5SB

0.5GR/W

112

88

Battery

DLC

Glow

Relay

Glow

Relay

IG

(ST)

IG

(ON)

SBF

50A

SBF

100A

3W/L

0.5B

SBF

50A

SBF

30A

SBF

60A

#19

15A

#22

10A

Main
Relay

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Содержание 4HL1

Страница 1: ...WORKSHOP MANUAL 727 N SERIES ENGINE CONTROL SYSTEM 4HL1 ENGINE SECTION 1A International Service Parts Tokyo Japan...

Страница 2: ...arefully read and thoroughly understand the information contained in Section 0A under the headings GENERAL REPAIR INSTRUCTIONS and HOW TO USE THIS MANUAL All material contained in this Manual is based...

Страница 3: ...Switch System Fault 1A 159 DTC82 Neutral Switch System Fault 1A 163 DTC84 CAN Communication Fault CAN Bus Error 1A 166 DTC86 CAN Communication Fault CAN Timeout Error 1A 169 DTC115 Common Rail Pressu...

Страница 4: ...ome types of electronic components may be damaged even by the static electricity of less than 100 V that is usually not sensed by persons Persons sensitivity level is 4 000 V Persons are electrostatic...

Страница 5: ...Voltages from ECM The ECM supplies reference voltages to various switches and sensors Resistances of the ECM are very high and this allows the ECM to supply voltages to these devices and voltages act...

Страница 6: ...Starter cut relay Glow relay Check engine lamp Tachometer TCM ABS ASR ECU ISS ECU Vehicle functions Atomospheric pressure sensor VIM Vehicle Interface Module ECM Engine Control Module Relay ECO Relay...

Страница 7: ...er at low engine speeds and temperatures fixed injection mode where only main injection is made at very low engine speeds during startup and normal injection mode where the fuel injection is made with...

Страница 8: ...intake throttle valve When the valve opening gets smaller the drive voltage is increased the output voltage of the ITP sensor becomes lower The valve position is normally calculated using engine cool...

Страница 9: ...ensor becomes higher The EGR control is initiated when parameters such as engine speed engine coolant temperature accelerator position atmospheric pressure and system voltage meet the required conditi...

Страница 10: ...not detected on the vehicle speed sensor The exhaust brake switch is turned on The engine is running at or above 500 rpm for at least 1 second The idle position switch is turned on and the gear is eng...

Страница 11: ...le Side Legend 1 Engine 2 Neutral switch 3 ECM engine control module 4 VIM vehicle interface module 5 Clutch pedal 6 Accelerator pedal 7 DLC data link connector 8 CHECK ENGINE lamp MIL 9 Exhaust brake...

Страница 12: ...the thermistor in the sensor alters the resistance in response to the temperature change The resistance is decreased when the coolant temperature is high while increased when the temperature is low Th...

Страница 13: ...voltage The valve is closed when the drive voltage is increased while opened when the voltage is decreased The ECM calculates the intake throttle valve opening based on the vehicle running condition...

Страница 14: ...ature is high while increased when the resistance is large the temperature is low SCV The SCV suction control valve is installed to the supply pump and controls the suction fuel quantity The SCV is fu...

Страница 15: ...stalled to the top of the accelerator pedal and supplies the voltage signal that will change in response to accelerator pedal angle to the ECM The ECM calculates the accelerator pedal position from th...

Страница 16: ...utral or parking position Exhaust Brake Solenoid Valve The exhaust brake solenoid valve is installed to the rear of the right front wheel frame some vehicle types have different positions and opens an...

Страница 17: ...link connector is installed to the dash side pane of the driver s seat and acts as a communication interface between external diagnostic tool and on board controllers The DLC can also function as a di...

Страница 18: ...F000401 X 27 28 No Indication on label Capacity Devices connected 1 CONTROLLER 10A Control unit 2 HAZARD HORN 12V 15A Hazard warning flashing lamp horn HAZARD HORN 24V 10A 3 10A 4 AIR CON 12V 10A Air...

Страница 19: ...side mirror ENG CONT 24V 15A ECM 17 MIRROR 10A Electrically operated mirror 18 CIGAR AUDIO 10A Cigarette lighter audio 19 METER 12V 10A Meter METER 24V 15A 20 ENGINE STOP 12V 10A Engine stop HSA 24V...

Страница 20: ...per Spare Power Circuit Cooler Relay Bracket 1 19 20 2 3 4 17 5 6 7 8 9 10 11 12 13 14 15 16 18 No Legend 1 12 V On relay 24 V Charge relay 2 Horn relay 3 12 V ABS VSV FICD EXH brake valve 12 V 24 V H...

Страница 21: ...ectric PTO AT 12 V OD off relay AT 24 V Idle keep relay for fire engine AT 24 V Idle stop radio relay with CFS 15 24 V PTO main relay for electric PTO MT 24 V Garbage relay for garbage collector AT 24...

Страница 22: ...SBF 50A SBF 60A M M M 0 75W B 0 75L Y 0 5Y 0 5W 0 5G 0 5G 0 5R 59 58 68 63 67 66 64 M M M DLC 0 5B 0 5B 0 85B 1 25B 1 25B 1 25B SCV 0 5R B 0 5G W 0 5R G 0 85L B 0 85O 49 46 48 91 83 25 0 5W R 6 8 27...

Страница 23: ...71 30 14 49 50 12 44 47 7 17 15 19 57 54 27 26 48 24 73 60 39 52 66 9 0 5L R 0 3LG B 0 3B G 0 5B R 0 85B O 0 3BR W 0 5LG B 0 5B W 1 25W R 1 25W R 1 25W R 0 3O L 0 5G Y 0 5W L 0 5LG R 0 5BR R 0 5B G 0...

Страница 24: ...P 3 P 4 4 B 67 SBF 2 50A KEY F 16 15A ENG CONT SBF 5 ECM SBF 3 60A 50A GLOW SBF 1 80A 100A MAIN H 7 3 X 18 117 J 191 118 J 191 5 X 18 2 X 18 9 H 4 0 5 B O 0 5 G O 0 5 B O 0 5 B 0 5 B 0 5 GR W 0 5 LB 0...

Страница 25: ...B 0 5 Y BR 0 5 Y 0 5 R B 0 5 Y BR 0 5 B 0 85 B 0 85 B 0 85 B 0 85 B 0 5 Y 0 5 R B 0 5 Y BR 0 5 Y G 0 5 R B H 4 H 8 47 B 352 H 8 H 8 J 7 60 B 350 73 B 349 52 B 351 66 B 349 39 B 352 6 2 B 319 B 319 3 B...

Страница 26: ...LG 0 5 G 0 5 G Y 0 3 LG 0 5 LG 0 5B W 0 5 LG 0 5 B W 0 5 B W 0 5 L R 0 5 Y G 0 3 BR W 0 3 O L 0 5 W O 0 5 G W 0 5 V W VIM B 259 6 CFS C U B 229 5 AISIN TCM B 47 20 JATCO TCM B 229 23 AISIN TCM B 47 1...

Страница 27: ...0 5 W R 0 5 R 0 5 G Y 0 5 W 0 75 W B 0 75 W G 0 75 L Y 0 75 L 0 75 R 0 75 L 0 75 W R 0 75 W R 0 75 W R 2 E 115 3 E 115 8 E 115 5 E 115 1 E 115 4 E 115 0 75 W R 1 25 L W 1 25 W 0 75 G W 0 75 B 1 25 L R...

Страница 28: ...0 J 191 119 J 191 3 B 280 2 B 280 1 B 280 2 J 190 1 J 190 10 H 4 30 H 5 1 H 4 3 H 4 2 H 4 4 H 8 87 J 191 0 5 B 1 25 B 1 25 B 1 25 B 0 5 L R 0 5 L W 0 5 L 0 5 B W 0 5 L R 0 85 O 0 5 L B 0 5 Y B 0 5 Y B...

Страница 29: ...elerator sensor 101 867 8 P 5 Frame ground 9 P 1 P 2 Battery 10 P 3 P 4 Battery 24 V 11 E 3 Glow plug 011 010 12 E 115 Injector 040 031 13 E 113 Common rail pressure sensor 040 211 14 E 94 EGR vacuum...

Страница 30: ...r connector 33 SBF 1 Main slow blow fuse 810 174 34 SBF 2 Key switch slow blow fuse 810 174 35 SBF 3 Glow slow blow fuse 810 174 36 SBF 5 ECM slow blow fuse 810 174 37 X 18 Main relay 828 531 38 X 22...

Страница 31: ...0 024 1 2 3 4 5 005 025 2 4 1 3 004 035 1 2 3 4 004 015 1 5 2 3 6 7 4 8 008 028 1 5 2 6 3 7 4 8 008 021 1 2 002 022 B 79 B 89 B 172 B 274 B 280 B 281 B 282 B 325 No Connector face 8 7 6 5 4 3 2 1 16 1...

Страница 32: ...48 47 46 45 44 43 42 13 12 3 51 50 41 2 40 1 39 026 013 1 001 003 1 001 034 1 001 029 E 90 E 93 E 94 E 98 E 111 E 112 E 113 E 114 No Connector face 1 2 3 003 095 002 208 1 2 005 034 1 4 2 3 5 1 2 002...

Страница 33: ...14 15 16 17 18 19 20 21 22 022 012 1 3 4 5 6 2 006 005 000 012 J 31 J 50 J 177 J 177 J 191 P 1 24V P 2 24V P 3 24V No Connector face 1 2 002 008 1 2 002 210 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 1...

Страница 34: ...1 2 3 5 4 005 013 LNW21ASH010801 1 2 3 7 8 9 13 14 15 19 20 21 25 26 27 31 32 33 34 35 36 37 4 5 6 10 11 12 16 17 18 22 23 24 28 29 30 38 39 40 6 5 4 12 11 10 18 17 16 24 23 22 30 29 28 40 39 38 3 2 1...

Страница 35: ...2 1 2 1 4 3 2 1 8 7 6 5 13 1211 10 9 18 1716 15 14 H 6 H 7 H 8 LNW21ASH010801 1 2 3 7 8 9 13 14 15 19 20 21 25 26 27 31 32 33 34 35 36 37 4 5 6 10 11 12 16 17 18 22 23 24 28 29 30 38 39 40 6 5 4 12 11...

Страница 36: ...93 94 95 96 97 82 83 84 85 86 87 88 89 Pin No Connected to Pin No Connected to 1 Injectors 1 and 3 42 Injector 3 cylinder 4 2 Injectors 1 and 3 43 Injector 1 cylinder 1 3 44 4 Injectors 2 and 4 45 5...

Страница 37: ...1 SCV HI 41 Pin No Connected to Pin No Connected to Pin No Connected to Pin No Connected to 82 102 Starter cut relay 83 5 V sensor power 2 IAT 103 84 AP sensor signal 104 85 105 86 106 87 Casing groun...

Страница 38: ...1A 36 Engine Control System VIM Pinouts 99 CHECK ENGINE lamp 119 ECM power ground 100 120 ECM power ground 101 121 ECM power ground Pin No Connected to Pin No Connected to LNW21AMF005101...

Страница 39: ...rm up QWS switch 50 Exhaust brake switch 13 51 Pin No Connected to Pin No Connected to 14 VS sensor signal 52 VIM power ground 15 ABS ASR controller 53 AT controller 16 AT controller 54 Voice alarm un...

Страница 40: ...can reproduce the fault However there may exist two or more causes Current fault The diagnostic flow can always be used to resolve an E E system problem and is a starting point when repairs are necess...

Страница 41: ...d be intermittent as defined in Intermittents or could be normal 2 Repair and verify After isolating the cause the repairs should be made Validate for proper operation and verify that the symptom has...

Страница 42: ...lassified as non vehicle fault but with the sensitivity of OBD diagnostics vehicle maintenance schedules must be more closely followed Related system faults Many of OBD system diagnostics will not run...

Страница 43: ...r component is operating according to specification There are many diagnostics shown in the following list EGR exhaust gas recirculation Engine speed Vehicle speed ECT engine coolant temperature IAT i...

Страница 44: ...it and enables backup control according to the DTC set When a fault occurs that will affect the running the ECM turns on the CHECK ENGINE lamp MIL in the meter panel or blinks the exhaust indicator l...

Страница 45: ...lerator pedal 3 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 4 Turn on the idle position switch for not less than 1 second but n...

Страница 46: ...6 103 120 A B C V Hearing The objective is to comprehend the symptom completely based on the customer complaint and provide accurate diagnostic On Board Diagnostic System Check The objective is to ide...

Страница 47: ...tom 2 Failure generation frequency and conditions The reason why this sheet is needed is as follows 1 The symptom may not be reproduced in the service factory 2 The customer complaint is always not re...

Страница 48: ...tions Check Engine lamp Fault history DTC Past Present ON Date year month day Date year month day Occasionally ON OFF No cranking No initial combustion Incomplete initial combustion Long cranking 6 se...

Страница 49: ...ubbed through wire insulation or wire broken inside the insulator Test Description Number s below refer to the step number s on the Diagnostic Chart 3 The CHECK ENGINE lamp MIL should be ON steady wit...

Страница 50: ...to Step 4 4 Check the data communications are normally established 1 Starter switch OFF 2 Install Tech 2 3 Starter switch ON 4 Using Tech 2 display engine data Does Tech 2 display engine data Go to S...

Страница 51: ...CHECK ENGINE lamp Does the CHECK ENGINE lamp blink Go to Step 11 Refer to Unblinking CHECK ENGINE Lamp Check and go to Step 11 11 Using Tech 2 check DTC Is DTC detected Go to the appropriate DTC Char...

Страница 52: ...nspect harness connectors for backed out pins improper mating broken locks improperly formed or damaged pins and poor pin to wire connection Damaged harness Inspect the wiring harness for rubbed throu...

Страница 53: ...h 50 A 1 Remove the SBF 2 Starter switch ON 3 Measure the voltage at the SBF connector Was the voltage within range 16 32V Go to Step 10 Go to Step 6 6 Check the battery voltage for correctness Is the...

Страница 54: ...pins Is the starter switch in normal condition Pins 2 3 Continued Go to Step 18 Go to Step 17 17 Replace the starter switch Is the action complete Verify repair and go to Step 23 18 Repair or replace...

Страница 55: ...ups to replacing the ECM Is the action complete Verify repair and go to Step 2 23 Re observe the CHECK ENGINE lamp for operation 1 Certainly install necessary components such as connectors fuses and r...

Страница 56: ...Inspect harness connectors for backed out pins improper mating broken locks improperly formed or damaged pins and poor pin to wire connection Damaged harness Inspect the wiring harness for rubbed thro...

Страница 57: ...cuit in normal condition ECM pin 112 ground Continued Go to Step 8 Go to Step 5 5 Check the DLC ground circuit for open wiring 1 Check the continuity between DLC pin and ground e g frame or body Is th...

Страница 58: ...lamp for operation 1 Certainly connect connectors 2 Short DLC pins 4 and 6 3 Starter switch ON and observe the CHECK ENGINE lamp Does the CHECK ENGINE lamp blink The repair is complete Go to Step 1 St...

Страница 59: ...e Is the action complete Verify repair and go to Step 4 4 Check the ON signal is input to the ECM from the starter switch 1 Disconnect the ECM 2 Starter switch ON 3 Measure the voltage between ECM con...

Страница 60: ...on complete Verify repair and go to Step 12 12 Check the circuit between main relay and ECM for open wiring 1 Remove the main relay 2 Disconnect the ECM 3 Check the continuity between main relay and E...

Страница 61: ...2 3 DLC cable 4 SAE 16 19 pin adapter Features of Tech 2 Tech 2 2 is operated at 12 V Therefore 24 V power supply must not be used for this tool If the vehicle electrical system rating is 24 V the ad...

Страница 62: ...the SAE 16 19 pin adapter to the DLC cable 3 Connect the DLC cable to Tech 2 4 Check the starter switch is turned off 5 Connect the Tech 2 SAE 16 19 pin adapter to the DLC data link connector black o...

Страница 63: ...002 F0 Diagnostic Trouble Codes F0 Read DTC Info As Stored By ECU F1 Clear DTC Information F1 Data Display F0 Data Display F1 Snapshot F2 Programming F0 Write Starting Counter F1 Write Starting Replac...

Страница 64: ...cannot select this data display menu A fault presents on the cable between ECM and DLC When an unusual value appears fixedly Example If the engine coolant temperature displayed is fixed to 40 C or 140...

Страница 65: ...em 3 After the snapshot option screen appears determine the trigger type and select Record Snapshot at the bottom 4 When Standby blinks at the upper right of the screen select Trigger at the bottom 5...

Страница 66: ...ase SCV Current mA Decrease Increase Difference Between Desired And Actual Values MPa within 1 When a fault is found in F0 Common rail Pressure Control Test When a fault is found in this test identify...

Страница 67: ...d ITP intake throttle position sensor Test procedure 1 Select Intake Throttle Test from Actuator Test 2 Press Decrease or Increase soft key to check the data list 3 When the data list changes as shown...

Страница 68: ...the ECM is faulty 2 The EGR Current valve position does not follow the EGR Target Lift valve position Following under regular error The problem lies in accuracy of EGR valve position sensor Following...

Страница 69: ...3 2 5 The value will change depending on temperatures around the engine Coolant Temperature C Normal running phase 55 Startup phase 20 DTC23 is detected 80 DTC84 is detected 20 23 The value will chan...

Страница 70: ...0 Desired Injection Quantity mm3 st 50 or less DTC115 DTC118 DTC227 DTC245 or DTC247 is detected Desired Fuel Injection Timing CA 0 Cylinder 1 Compensation mm3 st 0 DTC158 or DTC271 is detected 0 Cyli...

Страница 71: ...C84 is detected OFF Exhaust Brake ASR Cutoff Switch ON OFF OFF DTC84 is detected OFF Glow Time Relay ON OFF OFF DTC84 is detected OFF Starter Relay ON OFF OFF DTC84 is detected OFF Glow Time Lamp ON O...

Страница 72: ...ed 50 53 The value will change depending on temperatures around the engine Barometric Pressure Sensor V Approx 3 6 The value will change depending on the barometric pressure Barometric Pressure kPa 10...

Страница 73: ...tor Sensor V 0 DTC84 is detected 0 3 0 6 PTO Accelerator Opening 0 DTC28 or DTC84 is detected 0 ASR Accelerator Opening 100 DTC84 is detected 100 Starter Switch ON OFF ON DTC84 is detected OFF Ignitio...

Страница 74: ...19 21 ECT Sensor Engine Coolant Temperature V Approx 0 6 The value will change depending on temperatures around the engine Coolant Temperature C Normal running phase 55 Startup phase 20 DTC23 is dete...

Страница 75: ...ox 1 8 Actual Intake Throttle position CA Approx 30 2 Desired Intake Air Throttle Position CA Approx 30 Intake Throttle Duty Ratio Approx 9 10 Desired Injection Quantity mm3 st 50 or less DTC115 DTC11...

Страница 76: ...OFF DTC84 is detected OFF Exhaust Brake AT Cutoff Switch ON OFF OFF DTC84 is detected OFF Exhaust Brake ASR Cutoff Switch ON OFF OFF DTC84 is detected OFF Glow Time Relay ON OFF OFF DTC84 is detected...

Страница 77: ...OFF OFF DTC84 is detected OFF PTO Idle Position Switch ON OFF OFF DTC84 is detected OFF QWS Switch ON OFF OFF DTC84 is detected OFF Glow Time Lamp ON OFF OFF DTC84 is detected OFF ECO Relay ON OFF OFF...

Страница 78: ...unstable after vibrations are applied to the wiring harness the cause may be faulty harness or imperfect connection of ground circuit 4 63 Engine Speed RPM This parameter refers to the value calculat...

Страница 79: ...ltage input to the ECM from the FT fuel temperature sensor Higher fuel temperature provides lower voltage The fuel temperature is a proper criterion for various control configurations e g startup cold...

Страница 80: ...e sensor circuit or ECM may be faulty 19 63 SCV Current mA This parameter refers to the value calculated by the ECM based on the pump discharge determined from engine speed common rail pressure Larger...

Страница 81: ...When the display deviates from the specified level the intake throttle valve sensors circuit or ECM may be faulty 28 63 Desired Injection Quantity mm3 st This parameter refers to the value calculated...

Страница 82: ...ameter refers to the value calculated by the ECM using intake air temperature engine coolant temperature engine speed and desired fuel injection quantity When the display deviates from the specified l...

Страница 83: ...ter the key switch is moved to the position ON or ST When the display is fixed the switch circuit or ECM may be faulty 46 63 Clutch Switch ON OFF This parameter refers to the status of the signals inp...

Страница 84: ...ed the PTO switch circuit VIM or ECM may be faulty 54 63 A C Switch Air Conditioning ON OFF This parameter refers to the status of the signals input from the A C switch to the VIM It appears on the di...

Страница 85: ...appears on the display after the QWS switch in the cab is pressed When the display is fixed the QWS switch circuit VIM or ECM may be faulty 61 63 ECO Relay ON OFF This parameter refers to the status o...

Страница 86: ...re kPa This parameter refers to the value calculated by the VIM using the signals from the barometric pressure sensor When the display deviates from the specified level the sensor circuit or ECM may b...

Страница 87: ...the signals input from the exhaust brake switch to the VIM It appears on the display after the exhaust brake switch in the cab is pressed When the display is fixed the exhaust brake switch circuit VI...

Страница 88: ...switch are met When the display is fixed the relay circuit VIM or ECM may be faulty 22 31 Engine Stop Switch ON OFF This parameter refers to the status of the signals input from the engine stop switc...

Страница 89: ...rator position is limited the position is normally reduced from 100 This parameter refers to the percentage calculated by the VIM using the signals input from the AT controller When the display is fix...

Страница 90: ...off and the vehicle speed is 0 km h lasts 5 seconds 28 VIM PTO Accelerator Sensor System Fault The PTO accelerator sensor output signal exceeds 4 9 V for 1 second The ECM controls the powertrain usin...

Страница 91: ...Pressure Sensor Fixed Output Fault ON The state where the common rail pressure sensor is in normal condition there is no change in common rail pressure sensor output voltage the difference between des...

Страница 92: ...ment is disabled on pump overpressure and short pump pressure events 1 to 4 271 Cylinder 1 Injector Drive System Fault ON The battery voltage is at least 16 V the starter switch is turned on and the p...

Страница 93: ...ower Poor driveability Wire harnesses and connectors EGR valve and EGR DC motor system EGR valve main relay EGR DC motor ECM EGR Valve Position Sensor EGR Duty Cycle 46 VIM Exhaust Brake System Fault...

Страница 94: ...bility Generation of white black smoke Short power Poor driveability Wire harnesses and connectors SCV drive system SCV ECM SCV Duty Ratio SCV Current 271 Cylinder 1 Injector Drive System Fault Short...

Страница 95: ...tem fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for...

Страница 96: ...cause is open wiring If pins are not jumpered and the resistance reads 0 the cause is short Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check perf...

Страница 97: ...resistance within range Reference Pins 1 2 Pins 2 3 Approx 120 130 Pins 1 3 Pin 1 2 3 sensor body Go to Step 11 Go to Step 10 10 Replace the CMP sensor Is the action complete Verify repair and go to...

Страница 98: ...1A 96 Engine Control System Sensor Description Legend 1 CMP sensor 2 Shield ground 3 Sensor ground 4 Sensor signal LNW21ASF003301 1 2 3 4...

Страница 99: ...system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch...

Страница 100: ...open wiring If pins are not jumpered and the resistance reads 0 the cause is short Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go t...

Страница 101: ...e resistance within range Reference Approx 20 250 Pin 1 2 sensor body Go to Step 11 Go to Step 10 10 Replace the CKP sensor Is the action complete Verify repair and go to Step 13 11 Review the DTC 1 C...

Страница 102: ...1A 100 Engine Control System Sensor Description Legend 1 CKP sensor 2 Projections on flywheel 3 Sensor signal 4 Sensor signal LNW21ASF003201 3 4 1 2...

Страница 103: ...elerator pedal 4 Turn on the idle position switch for not less than 1 second but not more than 3 seconds Release the accelerator pedal 5 Turn off the idle position switch for not less than 1 second bu...

Страница 104: ...erform test run and review the DTC Is DTC18 detected Go to Step 6 Refer to Diagnostic Aids 6 1 Replace the VIM IMPORTANT If necessary for the vehicle equipped with idle stop function input the number...

Страница 105: ...et intake air temperature 10 C Conditions for Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clear...

Страница 106: ...he output voltage is fixed to 0 V the possible cause is short in the circuit Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go to Step...

Страница 107: ...M connector measure the resistance Was the resistance within range Pins 91 83 Pins 91 83 ground Go to Step 11 Go to Step 10 10 Repair or replace the faulty harness Is the action complete Verify repair...

Страница 108: ...or signal 15 Check DTC22 will not be set again 1 Using Tech 2 clear the DTC 2 Perform test run and review the DTC Is DTC22 detected Refer to Diagnostic Aids and go to Step 2 Repair is complete Step Ac...

Страница 109: ...M will illuminate the CHECK ENGINE lamp MIL The ECM controls the powertrain using the set engine coolant temperature normal running phase 110 C startup phase 20 C EGR and warm up systems are disabled...

Страница 110: ...nt intermittent fault 4 If DTC211 is also set the possible cause is the ground circuit common to ECT and FT sensors 10 If the output voltage is fixed to 5 V the possible cause is open wiring in the ci...

Страница 111: ...gine data 2 Starter switch ON engine OFF 3 Observe the ECT Sensor display for output voltage Was the voltage within range Approx 0 6 V ECT 80 C Go to Step 18 Go to Step 11 11 Check the ECT sensor outp...

Страница 112: ...nnect the ECT sensor and ECM connectors 2 Using Tech 2 clear the DTC 3 Perform test run and review the DTC Is DTC23 detected Go to Step 19 Refer to Diagnostic Aids 19 1 Replace the ECM IMPORTANT If ne...

Страница 113: ...ne Control System 1A 111 Sensor Description Legend 1 ECT sensor 2 Thermistor for ECM 3 Thermistor for meter 4 Sensor ground 5 Sensor signal on ECM 6 Sensor signal on meter LNW21ASF003101 2 3 1 4 6 5 4...

Страница 114: ...switch Conditions for Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the foll...

Страница 115: ...to 5 V the possible cause is short in the circuit 8 If pins are jumpered and the resistance reads the cause is open wiring If pins are not jumpered and the resistance reads 0 the cause is short Step...

Страница 116: ...90 jumpered pins 1 3 0 not jumpered Pins 94 84 90 108 not jumpered Pins 94 84 90 108 ground not jumpered Go to Step 10 Go to Step 9 9 Repair or replace the faulty harness Is the action complete Verif...

Страница 117: ...sor 3 Sensor ground 4 Sensor signal 5 Sensor power 14 Check DTC24 will not be set again 1 Using Tech 2 clear the DTC 2 Perform test run and review the DTC Is DTC24 detected Refer to Diagnostic Aids an...

Страница 118: ...Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn of...

Страница 119: ...Diagnostic OBD System Check Was the OBD System Check performed Go to Step 2 Refer to OBD System Check and go to Step 2 2 Check the VS sensor connector for installation and if mounted improperly insta...

Страница 120: ...2 Connect the VS sensor connector 3 Starter switch ON 4 While turning the VS sensor shaft slowly measure the voltage between connector pins 2 and 3 Did the voltage change within range 1 0 3 0 V 12 0 1...

Страница 121: ...Engine Control System 1A 119 Sensor Description Legend 1 VS sensor 2 Sensor signal 3 Sensor ground 4 Sensor power LNW21ASF002801 2 1 3 4...

Страница 122: ...ill not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator peda...

Страница 123: ...D System Check and go to Step 2 2 Check the PTO accelerator sensor system for mechanical fault 1 Check the PTO accelerator sensor connector for installation and if mounted improperly install the devic...

Страница 124: ...Step 11 Go to Step 10 10 Replace the PTO control lever PTO accelerator sensor Is the action complete Verify repair and go to Step 13 11 Review the DTC 1 Certainly connect the PTO accelerator sensor a...

Страница 125: ...repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 second but not more than 3 seco...

Страница 126: ...ort Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go to Step 2 Refer to OBD System Check and go to Step 2 2 Check the idle up volume...

Страница 127: ...ontinuity between idle up volume switch connector pins Was the resistance within range Pins 1 2 Discontinued Pins 2 3 Discontinued Pins 1 3 Continued Go to Step 12 Go to Step 11 11 Replace the idle up...

Страница 128: ...1A 126 Engine Control System Idle Up Volume Switch Description Legend 1 Power supply 2 Ground 3 Signal 1 2 3 Circuit Diagram 3 2 1 300 0 LNW21ASF000701 X...

Страница 129: ...not more than 3 seconds Release the accelerator pedal 5 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 6 After the above operatio...

Страница 130: ...ir or replace the faulty harness Is the action complete Verify repair and go to Step 6 6 1 Replace the VIM IMPORTANT If necessary for the vehicle equipped with idle stop function input the number of s...

Страница 131: ...following steps 1 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 2 Turn on the idle position switch for not less than 1 second bu...

Страница 132: ...Check performed Go to Step 2 Refer to OBD System Check and go to Step 2 2 Check the ECM connector for installation and if mounted improperly connect it certainly Is the action complete Go to Step 3 3...

Страница 133: ...em 1A 131 8 Check DTC34 will not be set again 1 Using Tech 2 clear the DTC 2 Perform test run and review the DTC Is DTC34 detected Refer to Diagnostic Aids and go to Step 1 Repair is complete Step Act...

Страница 134: ...s than 1 second but not more than 3 seconds Release the accelerator pedal 5 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 6 After...

Страница 135: ...ir or replace the faulty harness Is the action complete Verify repair and go to Step 6 6 1 Replace the VIM IMPORTANT If necessary for the vehicle equipped with idle stop function input the number of s...

Страница 136: ...ear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 2 Turn o...

Страница 137: ...ring in the circuit If the output voltage is fixed to 5 V the possible cause is short in the circuit 14 If pins are jumpered and the resistance reads the cause is open wiring If pins are not jumpered...

Страница 138: ...nnect the ITP sensor and ECM connectors 2 Using Tech 2 clear the DTC 3 Perform test run and review the DTC Is DTC43 detected Go to Step 10 Refer to Diagnostic Aids 10 Check the ITP sensor output volta...

Страница 139: ...nector pins Does the ITP sensor meet the requirements Pins 1 2 Pins 2 4 Pins 1 2 4 3 5 Discontinued Pins 1 4 Continued Go to Step 18 Go to Step 15 17 Replace the Intake trottle ITP sensor Is the actio...

Страница 140: ...e Control System Intake Throttle Valve Description Legend 1 Throttle valve 2 ITP sensor 3 Reduction gears 4 DC motor 5 Sensor ground 6 Sensor signal 7 Motor 8 Sensor power 9 Motor LNW21ASF002101 9 8 7...

Страница 141: ...om the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 2 Turn on the idle pos...

Страница 142: ...iring If pins are not jumpered and the resistance reads 0 the cause is short 10 If the output voltage is fixed to 5 V the possible cause is open wiring in the circuit If the output voltage is fixed to...

Страница 143: ...aulty harness Is the action complete Verify repair and go to Step 9 9 Review the DTC 1 Certainly connect the EGR position sensor and ECM connectors 2 Using Tech 2 clear the DTC 3 Perform test run and...

Страница 144: ...Step 19 15 Check the EGR valve position sensor 1 At the EGR valve connector pins measure the resistance Was the resistance within range Reference Pins 1 2 Approx 1 4 2 k Pins 2 3 Approx 6 8 Pins 1 3 A...

Страница 145: ...signal 5 Sensor ground 6 Sensor power 7 Motor 8 DC motor 19 Check DTC44 will not be set again 1 Using Tech 2 clear the DTC 2 Perform test run and review the DTC Is DTC44 detected Refer to Diagnostic A...

Страница 146: ...d the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less th...

Страница 147: ...se is short Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go to Step 2 Refer to OBD System Check and go to Step 2 2 Check the EGR val...

Страница 148: ...clear the DTC 3 Perform test run and review the DTC Is DTC45 detected Go to Step 9 Refer to Diagnostic Aids 9 1 Replace the ECM IMPORTANT If necessary for the vehicle equipped with idle stop function...

Страница 149: ...ABS ASR Conditions for Setting the DTC With the battery voltage at 20 V or more the engine speed at 500 rpm or more and the exhaust brake turned on the solenoid valve is turned off or exhaust brake t...

Страница 150: ...operly formed or damaged pins and poor pin to wire connection Damaged harness Inspect the wiring harness for rubbed through wire insulation or wire broken inside the insulator If the harness appears t...

Страница 151: ...ge Pins 75 ground jumpered pins 1 ground 0 not jumpered Go to Step 9 Go to Step 8 8 Repair or replace the faulty harness Is the action complete Verify repair and go to Step 11 9 Review the DTC 1 Using...

Страница 152: ...on switch for not less than 1 second but not more than 3 seconds Release the accelerator pedal 5 5 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the ac...

Страница 153: ...air or replace the faulty harness Is the action complete Verify repair and go to Step 6 6 1 Replace the ECM IMPORTANT If necessary for the vehicle equipped with idle stop function input the number of...

Страница 154: ...not more than 3 seconds Release the accelerator pedal 5 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 6 After the above operation...

Страница 155: ...air or replace the faulty harness Is the action complete Verify repair and go to Step 6 6 1 Replace the ECM IMPORTANT If necessary for the vehicle equipped with idle stop function input the number of...

Страница 156: ...Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn of...

Страница 157: ...Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go to Step 2 Refer to OBD System Check and go to Step 2 2 Check the intake throttle connect...

Страница 158: ...nectors 2 Using Tech 2 clear the DTC 3 Perform test run and review the DTC Is DTC61 detected Go to Step 9 Refer to Diagnostic Aids 9 1 Replace the ECM IMPORTANT If necessary for the vehicle equipped w...

Страница 159: ...lerator pedal 5 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 6 After the above operations are properly completed the CHECK ENGIN...

Страница 160: ...nostic Aids 4 1 Replace the VIM IMPORTANT If necessary for the vehicle equipped with idle stop function input the number of startups to the replacing VIM Is the action complete Verify repair and go to...

Страница 161: ...the CHECK ENGINE lamp MIL The exhaust brake is disabled Conditions for Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC...

Страница 162: ...related to the sensor A change in the display will indicate the location of the fault Test Description Number s below refer to the step number s on the Diagnostic Chart 3 If the DTC is not detected t...

Страница 163: ...arter switch OFF 2 Jumper the starter switch connector and measure the resistance at the VIM connector Was the resistance within range Pins 49 ground jumpered pins 2 ground 0 Go to Step 4 Go to Step 1...

Страница 164: ...stic Aids 14 1 Replace the VIM IMPORTANT If necessary for the vehicle equipped with idle stop function input the number of startups to the replacing VIM Is the action complete Verify repair and go to...

Страница 165: ...e is running for at least 180 seconds and the neutral switch is changed from on to off Action Taken When the DTC Sets After the DTC is set the ECM will illuminate the CHECK ENGINE lamp MIL The exhaust...

Страница 166: ...formed or damaged pins and poor pin to wire connection Damaged harness Inspect the wiring harness for rubbed through wire insulation or wire broken inside the insulator If the harness appears to be O...

Страница 167: ...s the action complete Verify repair and go to Step 10 8 Review the DTC 1 Certainly connect the neutral P N switch and VIM connectors 2 Using Tech 2 clear the DTC 3 Perform test run and review the DTC...

Страница 168: ...DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 2 Turn on the idle position switch for not less...

Страница 169: ...stance reads the cause is open wiring If pins are not jumpered and the resistance reads 0 the cause is short Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD S...

Страница 170: ...ion input the number of startups to the replacing ECM Is the action complete Verify repair and go to Step 7 7 Check DTC84 will not be set again 1 Using Tech 2 clear the DTC 2 Perform test run and revi...

Страница 171: ...he DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 2 Turn on the idle position switch for not les...

Страница 172: ...stance reads the cause is open wiring If pins are not jumpered and the resistance reads 0 the cause is short Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD S...

Страница 173: ...ion input the number of startups to the replacing ECM Is the action complete Verify repair and go to Step 7 7 Check DTC86 will not be set again 1 Using Tech 2 clear the DTC 2 Perform test run and revi...

Страница 174: ...ssure Sensor Fixed Output Fault Legend 1 Fuel tank 2 Fuel filter 3 Supply pump 4 SCV suction control valve 5 FT fuel temperature sensor 6 Common rail 7 Common rail pressure sensor 8 Injector 9 ECM eng...

Страница 175: ...aken When the DTC Sets After the DTC is set the ECM will illuminate the CHECK ENGINE lamp MIL The common rail pressure and fuel injection quantity are limited Conditions for Clearing MIL DTC When the...

Страница 176: ...3 Bleed the air from the fuel system 4 Perform test run and review the DTC Is DTC115 detected Go to Step 3 Refer to Diagnostic Aids 3 Check the common rail pressure 1 Install Tech 2 2 Starter switch...

Страница 177: ...ce the common rail common rail pressure sensor Is the action complete Verify repair and go to Step 9 9 Review the DTC 1 Restore the vehicle 2 Bleed the air from the fuel system 3 Using Tech 2 clear th...

Страница 178: ...on complete Go to Step 15 15 Check DTC115 will not be set again 1 Restore the vehicle 2 Bleed the air from the fuel system 3 Using Tech 2 clear the DTC 4 Perform test run and review the DTC Is DTC115...

Страница 179: ...ressure Fault Control System Legend 1 Fuel tank 2 Fuel filter 3 Supply pump 4 SCV suction control valve 5 FT fuel temperature sensor 6 Common rail 7 Common rail pressure sensor 8 Injector 9 ECM engine...

Страница 180: ...To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 2 Turn on the idle position switch f...

Страница 181: ...agnostic Aids 3 1 The flow damper may have been working Leave the vehicle inactive overnight 2 Perform test run and review the DTC Is DTC118 detected Go to Step 4 Refer to Test Description 4 Inspect t...

Страница 182: ...CAUTION After the common rail pressure sensor is disconnected DTC245 is set Be sure to clear this DTC245 upon completion of this Step 9 Was the voltage within range Approx 5 V Go to Step 13 Go to Ste...

Страница 183: ...5 Repair is complete 15 Inspect the common rail 1 Check the pressure limiter for fuel leak Is the common rail sound Go to Step 17 Go to Step 16 16 Replace the common rail Is the action complete Go to...

Страница 184: ...the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 second but not mo...

Страница 185: ...on Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go to Step 2 Refer to OBD System Check and go to Step 2 2 Check the injector connector for insta...

Страница 186: ...ect harnesses from injectors for cylinders 1 and 4 3 Measure the resistance between injector terminal and connector pin as well as between connector pins Was the resistance within range Cylinder 1 pin...

Страница 187: ...uipped with idle stop function input the number of startups to the replacing ECM Is the action complete Verify repair and go to Step 16 16 Check DTC158 will not be set again 1 Using Tech 2 clear the D...

Страница 188: ...the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 second but not mo...

Страница 189: ...e s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go to Step 2 Refer to OBD System Check and go to Step 2 2 Check the injector connector for installation...

Страница 190: ...ect harnesses from injectors for cylinders 2 and 3 3 Measure the resistance between injector terminal and connector pin as well as between connector pins Was the resistance within range Cylinder 2 pin...

Страница 191: ...uipped with idle stop function input the number of startups to the replacing ECM Is the action complete Verify repair and go to Step 16 16 Check DTC159 will not be set again 1 Using Tech 2 clear the D...

Страница 192: ...ase 70 C startup phase 20 C Conditions for Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the...

Страница 193: ...t voltage is fixed to 0 V the possible cause is short in the circuit Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go to Step 2 Refer...

Страница 194: ...Step 14 12 Check the FT sensor circuit for B short 1 Starter switch OFF 2 Disconnect the ECM 3 At the ECM connector pins measure the resistance Was the resistance within range Pins 48 46 109 114 115...

Страница 195: ...test run and review the DTC Is DTC211 detected Refer to Diagnostic Aids and go to Step 2 Repair is complete 19 Review the DTC 1 Certainly connect the FT sensor and ECM connectors 2 Using Tech 2 clear...

Страница 196: ...e Sensor Description Legend 1 FT sensor signal 2 FT sensor ground 3 FT sensor 4 Camshaft 5 SCV 6 SCV HI 7 SCV LO 0 1 0 3 0 2 0 5 0 4 0 6 0 8 1 2 3 4 5 6 8 10 20 30 0 20 20 40 60 80 100120 LNW21ASH0104...

Страница 197: ...t is at least 1500 mA B short is detected on the circuit between SCV and ECM Action Taken When the DTC Sets After the DTC is set the ECM will illuminate the CHECK ENGINE lamp MIL The common rail press...

Страница 198: ...play will indicate the location of the fault Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go to Step 2 Refer to OBD System Check and...

Страница 199: ...cted Go to Step 10 Refer to Diagnostic Aids 10 1 Replace the ECM IMPORTANT If necessary for the vehicle equipped with idle stop function input the number of startups to the replacing ECM Is the action...

Страница 200: ...Pressure Feed Fuel Leak Legend 1 Fuel tank 2 Fuel filter 3 Supply pump 4 SCV suction control valve 5 FT fuel temperature sensor 6 Common rail 7 Common rail pressure sensor 8 Injector 9 ECM engine cont...

Страница 201: ...off the idle position switch for not less than 1 second but not more than 3 seconds Press the accelerator pedal 2 Turn on the idle position switch for not less than 1 second but not more than 3 secon...

Страница 202: ...nd review the DTC Is DTC227 detected Go to Step 4 Refer to Test Description 4 Inspect the fuel system according to the following procedures 1 Check the fuel filter for excessive contamination and chok...

Страница 203: ...CAUTION After the common rail pressure sensor is disconnected DTC245 is set Be sure to clear this DTC245 upon completion of this Step 9 Was the voltage within range Approx 0 V Go to Step 13 Go to Ste...

Страница 204: ...r is complete 15 Inspect the common rail 1 Check the pressure limiter for fuel leak Is the common rail normal in condition Go to Step 17 Go to Step 16 16 Replace the common rail Is the action complete...

Страница 205: ...s the powertrain using the set accelerator position 20 Conditions for Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC f...

Страница 206: ...System Check and go to Step 2 2 Check the idle position switch for mechanical fault 1 Check the idle position switch connector for installation and if mounted improperly install the device certainly...

Страница 207: ...r for open wiring 1 Disconnect the ECM 2 Jumper the idle position switch connector pin and measure the resistance at the ECM connector Was the resistance within range Pins 110 87 0 Go to Step 11 Go to...

Страница 208: ...ols the powertrain using the set accelerator position 20 Conditions for Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC...

Страница 209: ...System Check and go to Step 2 2 Check the idle position switch for mechanical fault 1 Check the idle position switch connector for installation and if mounted improperly install the device certainly...

Страница 210: ...M connector Was the resistance within range Pins 110 87 jumpered 0 not jumpered Go to Step 10 Go to Step 9 9 Repair or replace the faulty harness Is the action complete Go to Step 12 10 Review the DTC...

Страница 211: ...common rail pressure and fuel injection quantity are limited The ECM declares the common rail pressure sensor fault and stops the related control tasks and fault judgment Conditions for Clearing MIL D...

Страница 212: ...e is ground circuit common to ITP sensor and EGR position sensor or common rail pressure sensor 7 If pins are jumpered and the resistance reads the cause is open wiring If pins are not jumpered and th...

Страница 213: ...nd ECM connectors 2 Using Tech 2 clear the DTC 3 Perform test run and review the DTC Is DTC245 detected Go to Step 10 Refer to Diagnostic Aids 10 Check the common rail pressure sensor output voltage 1...

Страница 214: ...o to Step 20 15 Check the common rail pressure 1 Install Tech 2 2 Starter switch ON 3 Observe Desired Rail Pressure and Actual Rail Pressure displays 4 Start the engine Run the engine at idle for warm...

Страница 215: ...ECM IMPORTANT If necessary for the vehicle equipped with idle stop function input the number of startups to the replacing ECM Is the action complete Verify repair and go to Step 20 20 Check DTC245 wi...

Страница 216: ...1A 214 Engine Control System Sensor Description Legend 1 Pressure limiter 2 Common rail pressure sensor 3 Sensor ground 4 Sensor signal 5 Sensor power LNW21ASF002901 1 2 5 4 3...

Страница 217: ...y Conditions for Setting the DTC The SCV drive current is 1100 mA or less Short to ground between SCV and ECM B short between SCV and ECM short to ground between SCV and ECM or open wiring between SCV...

Страница 218: ...ault Test Description Number s below refer to the step number s on the Diagnostic Chart 3 If the DTC is not detected the possible cause is intermittent intermittent fault 5 If pins are jumpered and th...

Страница 219: ...Aids and go to Step 2 Repair is complete 10 Review the DTC 1 Certainly connect the SCV and ECM connectors 2 Using Tech 2 clear the DTC 3 Perform test run and review the DTC Is DTC247 detected Go to S...

Страница 220: ...1A 218 Engine Control System SCV Description Legend 1 FT sensor signal 2 FT sensor ground 3 FT sensor 4 Camshaft 5 SCV 6 SCV HI 7 SCV LO LNW21ASF002601 5 4 3 1 2 7 6...

Страница 221: ...inder 1 injector 1 is terminated Conditions for Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clea...

Страница 222: ...s open wiring If pins are not jumpered and the resistance reads 0 the cause is short Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go...

Страница 223: ...intermediate connector 2 Disconnect harnesses from the cylinder 1 injector 3 Measure the resistance between injector terminal and connector pin as well as between connector pins Was the resistance wit...

Страница 224: ...uipped with idle stop function input the number of startups to the replacing ECM Is the action complete Verify repair and go to Step 16 16 Check DTC271 will not be set again 1 Using Tech 2 clear the D...

Страница 225: ...inder 2 injector 4 is terminated Conditions for Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clea...

Страница 226: ...s open wiring If pins are not jumpered and the resistance reads 0 the cause is short Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go...

Страница 227: ...intermediate connector 2 Disconnect harnesses from the cylinder 2 injector 3 Measure the resistance between injector terminal and connector pin as well as between connector pins Was the resistance wit...

Страница 228: ...uipped with idle stop function input the number of startups to the replacing ECM Is the action complete Verify repair and go to Step 16 16 Check DTC272 will not be set again 1 Using Tech 2 clear the D...

Страница 229: ...inder 3 injector 2 is terminated Conditions for Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clea...

Страница 230: ...s open wiring If pins are not jumpered and the resistance reads 0 the cause is short Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go...

Страница 231: ...intermediate connector 2 Disconnect harnesses from the cylinder 3 injector 3 Measure the resistance between injector terminal and connector pin as well as between connector pins Was the resistance wit...

Страница 232: ...uipped with idle stop function input the number of startups to the replacing ECM Is the action complete Verify repair and go to Step 16 16 Check DTC273 will not be set again 1 Using Tech 2 clear the D...

Страница 233: ...inder 4 injector 3 is terminated Conditions for Clearing MIL DTC When the system fails and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clea...

Страница 234: ...s open wiring If pins are not jumpered and the resistance reads 0 the cause is short Step Action Value s Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go...

Страница 235: ...intermediate connector 2 Disconnect harnesses from the cylinder 4 injector 3 Measure the resistance between injector terminal and connector pin as well as between connector pins Was the resistance wit...

Страница 236: ...quipped with idle stop function input the number of startups to the replacing ECM Is the action complete Verify repair and go to Step 16 16 Check DTC274 will not be set again 1 Using Tech 2 clear the...

Страница 237: ...DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 s...

Страница 238: ...Is the action complete Go to Step 3 3 Review the DTC 1 Using Tech 2 check and store the DTC 2 Clear the DTC 3 Perform test run and review the DTC Is DTC277 detected Go to Step 4 Refer to Diagnostic Ai...

Страница 239: ...within range 0 4 Go to Step 12 Go to Step 10 10 Repair or replace the faulty injector s Is the action complete Go to Step 11 11 Check DTC277 will not be set again 1 Restore the vehicle 2 Using Tech 2...

Страница 240: ...1A 238 Engine Control System Injector Description Legend 1 Injector 2 Power supply harness 3 Drive harness LNW21ASH010701 1 2 3...

Страница 241: ...DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 s...

Страница 242: ...Is the action complete Go to Step 3 3 Review the DTC 1 Using Tech 2 check and store the DTC 2 Clear the DTC 3 Perform test run and review the DTC Is DTC278 detected Go to Step 4 Refer to Diagnostic Ai...

Страница 243: ...as the resistance within range 0 4 Go to Step 12 Go to Step 10 10 Replace the faulty injector s Is the action complete Go to Step 11 11 Check DTC278 will not be set again 1 Restore the vehicle 2 Using...

Страница 244: ...1A 242 Engine Control System Injector Description Legend 1 Injector 2 Power supply harness 3 Drive harness LNW21ASH010701 1 2 3...

Страница 245: ...o the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less than 1 second but not m...

Страница 246: ...Yes No 1 Perform the On Board Diagnostic OBD System Check Was the OBD System Check performed Go to Step 2 Refer to OBD System Check and go to Step 2 2 Check the main relay 1 Remove the main relay 2 At...

Страница 247: ...Engine Control System 1A 245 Main Relay Description Legend 1 Contact 1 battery side 2 Contact 2 ECM side 3 Coil 1 battery side 4 Contact 3 5 Coil 2 ECM side LNW21ASF002701 2 3 5 1 4 1 3 5 2 4...

Страница 248: ...and the DTC is stored to the ECM even repairing the faulty portion will not clear the DTC from the memory To clear the DTC conduct the following steps 1 Turn off the idle position switch for not less...

Страница 249: ...n Board Diagnostic OBD System Check Was the OBD System Check performed Go to Step 2 Refer to OBD System Check and go to Step 2 2 Check the path between starter switch ST and ON circuits for short 1 St...

Страница 250: ...ds 9 1 Replace the ECM IMPORTANT If necessary for the vehicle equipped with idle stop function input the number of startups to the replacing ECM Is the action complete Verify repair and go to Step 10...

Страница 251: ...minates for 3 seconds to report the memory is cleared 7 Turn off the starter switch Wait for 5 seconds and turn on the starter switch again When Tech 2 has been connected to the vehicle the DTC can be...

Страница 252: ...startability at low temperature The engine shows good startability at ordinary temperature but it takes long time to start at low temperature Hunting instable idling The idle speed is instable or vary...

Страница 253: ...ure limiter D 14 Injector C 3 Fuel filter pipe tank D 4 Fuel D 12 Valve clearance D 1 Valve timing D 11 Compression D 2 Ring gear D 6 Rotary parts D 10 CKP sensor D 8 CMP sensor D 8 Mechanical timing...

Страница 254: ...with the idle stop system turned off Inspect the clutch free system Inspect the system for ASR or AT accelerator cut request Inspect the parking brake or retarder for working Inspect the engine oil fo...

Страница 255: ...and Accelerator Pedal Position Sensor displays while operating the accelerator pedal Reference value Idle position 0 approx 0 6 V WOT position 100 approx 4 5 V 4 PTO accelerator sensor 1 Check the ext...

Страница 256: ...speed is reduced 3 Injector 1 Perform the injector balance test to check all the injectors are working 2 Observe the Cylinder 1 4 Compensation display for individual cylinders to check all the cylinde...

Страница 257: ...cleaner intake pipe Perform the visual check according to the following procedures Check the air cleaner for excessive contamination and choke Check the pipe for damage collapse and poor assembling 6...

Страница 258: ...the starter for motor rotation and pinion projection Refer to Starter in Electrical System 14 Common rail flow damper pressure limiter 1 Check the flow damper or pressure limiter is not working 2 Che...

Страница 259: ...move the mylar 3 Untwist the conductors 4 Strip the insulator as necessary Installation Procedure 1 Splice the wires using splice clips and rosin core solder 2 Wrap each splice to insulate 3 Wrap the...

Страница 260: ...s required Installation Procedure 1 Use splice clips and rosin core solder in order to splice the two wires together 2 Cover the splice with tape in order to insulate it from the other wires 3 Twist t...

Страница 261: ...Engine Control System 1A 259 4 Tape the wires with electrical tape Hold in place LNW21ASH005101...

Страница 262: ...pins these pins cannot be straightened after they have been improperly bent 3 Cut the wire immediately behind the cable seal Installation Procedure Make certain the connectors are properly seated and...

Страница 263: ...System 1A 261 5 Push the pin and the connector to engage the locking tangs 6 Close the secondary locking hinge Special Tools LNW21ASH005401 Illustration Tool No Tool name 5 8840 0388 0 Weather Pack Te...

Страница 264: ...II pin looks similar to some Weather Pack pins This pin is not sealed and is used where resistance to the environment is not required Use the standard method when repairing a pin Do not use the Weathe...

Страница 265: ...wire and the pin out through the connector IF you reuse the pin reshape the locking tang Installation Procedure Metri Pack pins are also referred to as pull to seat pins 1 In order to install a pin o...

Страница 266: ...manual number that is shown above All rights reserved This manual may not be reproduced in whole or in part without the permission in writing of ISUZU MOTORS LIMITED Issued by ISUZU MOTORS LIMITED IN...

Страница 267: ...No LG4HL WE 0229DOM...

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