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GEN III V8 ENGINE MANAGEMENT

SYSTEM DIAGNOSTICS

The PCM has two functions to perform

1. It must be able to control the vehicle systems using sensor inputs and internal software

2. It must also be able to perform system diagnostics

Both management systems have the ability to share information and communicate

The PCM diagnostics are controlled by the diagnostic management system The diagnostic management
system must be able to

• Perform diagnostic testing

• Record the results of diagnostic testing

• Request test fail actions

P a g e - 1 2 GEN III V8 ENGINE MANAGEMENT

Summary of Contents for GEN III V8

Page 1: ...HOLDEN GEN III V8 ENGINE MANAGEMENT...

Page 2: ...HOLDEN LTD A C N 006 893 232 SERVICE TRAINING COPYRIGHT HOLDEN LTD Reproduction in whole or in part prohibited without written approval February 2000...

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Page 4: ...GEN III V8 ENGINE MANAGEMENT CONTENTS SUBJECT GEN III V8 ENGINE MANAGEMENT...

Page 5: ...GEN III V8 ENGINE MANAGEMENT NOTES GEN III V8 ENGINE MANAGEMENT...

Page 6: ...ch as the Powertrain Interface Module PIM Instruments and the Body Control Module BCM The illustration on the following page contains a list of the various operating conditions sensed by the PCM on th...

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Page 9: ...CM controls the 12 volts sent to the coil of the relay The earth side of the fuel pump relay coil is connected to engine earth The PCM supplies current to the PCS and monitors how much current returns...

Page 10: ...the operating conditions at the time the diagnostic fails The PCM stores this information in the Freeze Frame Failure Records Conditions for clearing the Check Powertrain Lamp and DTC P1635 The PCM t...

Page 11: ...g the connector into place is not necessary if it is being installed with the proper orientation Failure to take care to match the indexing tabs and slots to ensure the connector is being installed co...

Page 12: ...circuit or component through logic based on the process of elimination The charts are prepared with the requirement that the vehicle Functioned correctly at the time of assembly There are no multiple...

Page 13: ...g Publications 5 Service Diagnostics Paper Electronic 5 1 DTC Stored Follow the designed DTC table exactly to make an effective repair 5 2 Symptom No DTC Select the symptom from the symptom tables and...

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Page 15: ...about what is happening in the engine transmission management system The Data Link Connector DLC is used by the assembly plant to perform end of line tests This connector can also be used by technici...

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Page 17: ...t must also be able to perform system diagnostics Both management systems have the ability to share information and communicate The PCM diagnostics are controlled by the diagnostic management system T...

Page 18: ...rmation in the Service Manual Diagnostic testing occurs during a trip A Trip is a key on cycle in which all the enable criteria for a given diagnostic test are met followed by a key off power down Sin...

Page 19: ...rds are stored any time a diagnostic test fails The PCM has the ability to store up to six freeze frame failure records When a diagnostic test fails records are stored in the first fail position If a...

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Page 21: ...Clear DTCs There are three methods for clearing DTCs from the PCM memory Method1 Tech 2 can be used to clear DTC information This also clears freeze frame failure record data and statistical PCM filt...

Page 22: ...ons The test fail actions are dependent on the DTC The Diagnostic Management System may perform the following once a DTC is set Illuminate the Check Power train Lamp controlled by the Diagnostic Execu...

Page 23: ...GEN III V8 ENGINE MANAGEMENT PCM GEN III V8 ENGINE DIAGNOSTIC TROUBLE CODES DTC Page 1 8 GEN III V8 ENGINE MANAGEMENT...

Page 24: ...GEN III V8 ENGINE MANAGEMENT PCM GEN III V8 ENGINE DIAGNOSTIC TROUBLE CODES DTC Continued GEN III V8 ENGINE MANAGEMENT Page 1 9...

Page 25: ...GEN III V8 ENGINE MANAGEMENT NOTES Page 20 GEN III V8 ENGINE MANAGEMENT...

Page 26: ...ansmit serial data via the conventional Universal Asynchronous Receive and Transmit UART protocol Since these two types of serial data are not compatible the PIM is required to transmit data in either...

Page 27: ...its sec With UART communication when there is no communication on the data line the system voltage will be 5 volts The GEN III V8 PCM uses Class 2 communication This type of communication toggles the...

Page 28: ...a bus and inhibiting theft deterrent communications This period short loop time continues until the PIM responds with an acknowledgment or for a maximum of five seconds after which the BCM will switch...

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Page 32: ...n Displays if the PCM is requesting the BCM to turn on the low speed cooling fan in run on mode Displays the current PCM Theft Status Displays PCM DTC status Displays the current Status of the Check P...

Page 33: ...e serial data circuit or other circuits and direct the technician in the proper direction for diagnosis There are no PIM DTC tables associated with these twenty 20 PIM DTCs so always diagnose the PCM...

Page 34: ...rsion number will vary with PIM software updates Will display Off when the diagnostic enable line is grounded Represents the commanded state of the A C clutch control relay Clutch should be engaged wh...

Page 35: ...ds The PCM uses this signal to accurately measure crankshaft position and engine speed The reluctor wheel is mounted on the rear of the crankshaft The 24X reluctor wheel use two different width notche...

Page 36: ...turns the Check Powertrain Lamp OFF when the diagnostic runs and does not fail A last test failed current DTC clears when the diagnostic runs and does not fail DTC P0336 Crankshaft Position Sensor Cir...

Page 37: ...ch the PCM reads The PCM uses this IX signal in combination with the Crankshaft Position sensor 24X signal in order to determine crankshaft position and stroke If the PCM is receiving a 24X Crankshaft...

Page 38: ...e signal should be high for at least one second Action taken when the DTC P0342 Sets The PCM illuminates the Check Powertrain Lamp when the diagnostic runs and fails The PCM records the operating cond...

Page 39: ...significantly above ambient air temperature The two heated elements are connected electrically in parallel and mounted directly in the air flow stream of the sensor housing One sensor is in the top an...

Page 40: ...ting or at idle The Tech 2 scan tool displays MAF sensor information in frequency and in grams per second At idle the readings should be low and increase with engine RPM If a problem occurs in the MAF...

Page 41: ...ses speed density RPM MAP IAT for fuel management Conditions for clearing the Check Powertrain Lamp and DTC P0101 The PCM turns the Check Powertrain Lamp OFF when the diagnostic runs and does not fail...

Page 42: ...The PCM illuminates the Check Power train Lamp when the diagnostic runs and fails The PCM utilises speed density RPM MAP IAT for fuel management The PCM records the operating conditions at the time th...

Page 43: ...inside the manifold is the same as outside the manifold during wide open throttle so it measures 100 of outside air pressure atmospheric pressure The MAP sensor is also used to measure barometric pre...

Page 44: ...ic runs and does not fail A last test failed current DTC clears when the diagnostic runs and does not fail DTC P0108 Manifold Absolute Pressure Sensor Circuit High Voltage Conditions for running DTC P...

Page 45: ...ensor warms Engine coolant temperature affects most systems controlled by the PCM The PCM uses a dual pull up resistor network to increase the resolution through the entire operating range of engine c...

Page 46: ...k Powertrain Lamp OFF when the diagnostic runs and does not fail A last test failed current DTC clears when the diagnostic runs and does not fail DTC P0118 Engine Coolant Temperature Sensor Circuit Hi...

Page 47: ...s The PCM stores the DTC information into memory when the diagnostic runs and fails The Check Powertrain Lamp will not be illuminated The PCM records the operating conditions at the time the diagnosti...

Page 48: ...80 ohms at 130 C The PCM 1 Supplies a 5 volt signal voltage to the sensor through a resistor in the PCM and 2 Monitors the intake air temperature circuit voltage which will change when connected to th...

Page 49: ...Check Powertrain Lamp and DTC P0112 A last test failed current DTC clears when the diagnostic runs and does not fail DTC P0113 Intake Air Temperature Sensor Circuit High Voltage Conditions for runnin...

Page 50: ...s for clearing the Check Power train Lamp and DTC P 1 1 1 1 A last test failed Current DTC will clear when the diagnostic runs and does not fail DTC P 1 1 1 2 Intake Air Temperature Sensor Circuit Int...

Page 51: ...ine fuel delivery based on throttle valve angle driver demand A broken or loose TP sensor can cause intermittent bursts of fuel from the injectors and an unstable idle because the PCM interprets the t...

Page 52: ...p and DTC P0121 The PCM turns the Check Powertrain Lamp OFF when the diagnostic runs and does not fail A last test failed current DTC clears when the diagnostic runs and does not fail DTC P0122 Thrott...

Page 53: ...Voltage ConditionsforrunningDTCP1121 The ignition is on ConditionsforsettingDTCP1121 The TP sensor voltage is greater than 4 8 volts Action taken when DTC P1121 Sets The PCM stores the DTC informatio...

Page 54: ...lows through the heater circuit and gradually reduces to approximately 0 5 amps as the sensor reaches full operating temperature The other two sensor wires are for the sensor s signal to the PCM and t...

Page 55: ...as they cure that may contaminate the oxygen sensor This contamination is usually caused by the vapours being pulled from the PCV system into the combustion chamber and passed on to the exhaust syste...

Page 56: ...resent for at least 33 seconds Criteria 2 DTCs P0101 P0102 P0103 P0112 P0113 P0117 P0118 P0121 P0122 P0123 P0335 P0336 P0351 P0358 P1258 are not set The ignition voltage is greater than 9 0 volts The...

Page 57: ...cle that the diagnostic runs and does not fail A last test failed current DTC clears when the diagnostic runs and does not fail DTC P0133 Heated Oxygen Sensor Slow Response Bank 1 Sensor 1 Conditions...

Page 58: ...t test failed current DTC clears when the diagnostic runs and does not fail DTC P0135 Heated Oxygen Sensor Heater Circuit Bank 1 Sensor 1 Conditions for running DTC P0135 DTCs P0101 P0102 P0103 P0112...

Page 59: ...that the diagnostic runs and does not fail A last test failed current DTC clears when the diagnostic runs and does not fail DTC P0152 Heated Oxygen Sensor Circuit High Voltage Bank 2 Sensor 1 Conditio...

Page 60: ...ng the Check Powertrain Lamp and DTC P0153 The PCM turns the Check Powertrain Lamp OFF after one ignition cycle that the diagnostic runs and does not fails A last test failed current DTC clears when t...

Page 61: ...0122 P0123 P0335 P0336 P0351 P0352 P0353 P0354 P0355 P0356 P0357 P0358 P 1 1 1 1 P1112 P1258 are not set The engine coolant temperature is between 50 C and 115 C The barometric pressure is greater tha...

Page 62: ...ure conditions A last test failed Current DTC clears when the diagnostic runs and does not fail DTC P0174 Fuel System Lean Bank 2 Conditions for running DTC P0174 DTCs P0101 P0102 P0103 P0107 P0108 P0...

Page 63: ...ditions that the DTC last failed NOTE If the last failure was during a non typical driving condition the Check Powertrain Lamp may remain ON longer than the one drive trip Review the Freeze Frame Fail...

Page 64: ...knock sensor is specifically chosen for this engine to best detect engine knock over all the other noises in the engine The knock sensor produces an AC output voltage that increases with the severity...

Page 65: ...Lamp OFF after one ignition cycle that the diagnostic runs and does not fail A last test failed current DTC clears when the diagnostic runs and does not fail DTC P0327 Knock Sensor Circuit Front Senso...

Page 66: ...ency is less than or greater than the expected amount for at least three seconds Action taken when DTC P0332 Sets The PCM illuminates the Check Powertrain Lamp when the diagnostic runs and fails The P...

Page 67: ...negative direction This AC voltage produced in the VSS sensor circuit is fed into the PCM the PCM filters and shapes the signal The PCM then counts the number of pulses received in a given time to det...

Page 68: ...P0502 A last test failed current DTC clears after one ignition cycle that the diagnostic runs and does not fail DTC P0503 Vehicle Speed Sensor Circuit Intermittent Conditions for running DTC P0503 No...

Page 69: ...The condition must be present for at least ten seconds Action taken when DTC P0608 Sets The PCM stores the DTC information into memory when the diagnostic runs and fails The Check Powertrain Lamp will...

Page 70: ...de the surge tank will rise the magnet in the float will cause the reed switch contacts to close pulling the PCM supplied voltage low When the coolant level is low the float will fall the reed switch...

Page 71: ...Oil Pressure Sensor Low Voltage Conditions for running DTC P0522 The engine is running Conditions for setting DTC P0522 The Engine Oil Pressure Sensor voltage is less than 0 48 volts Action taken when...

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Page 73: ...ng diaphragm The PCM will disengage the A C compressor at low or high refrigerant pressures and control the operation of the engine cooling fans A failure in the A C Refrigerant Pressure Sensor or Cir...

Page 74: ...t the PCM to turn the A C compressor clutch on or off when required The PCM on receiving a request to turn on the A C compressor will 1 Adjust the Idle Air Control IAC valve position to compensate for...

Page 75: ...g If the A C master switch is pressed again the BCM will request the PCM to turn off the A C compressor The operating status of the system will be remembered by the BCM when the ignition is switched f...

Page 76: ...equest Signal Circuit Without ECC The PCM on receiving a request to turn on the A C compressor monitors the A C pressure coolant temperature and throttle position to determine A C clutch operation GEN...

Page 77: ...is information in the Freeze Frame Failure Records Conditions for clearing the Check Powertrain Lamp and DTC P1539 A last test failed Current DTC will clear when the diagnostic runs and does not fail...

Page 78: ...han 1500 kPa or The coolant temperature is greater than 98 C or If the coolant temperature is greater than 113 C when the ignition is switched off the relay is energised for approximately four minutes...

Page 79: ...inturn convert the PCM Class 2 message to a UART message and supply this UART message to the BCM This message will request the BCM to supply the needed earth signal for the Low Speed Relay to operate...

Page 80: ...e PCM stores this information in the Freeze Frame Failure Records Conditions for clearing the Check Powertrain Lamp and DTC P0481 The PCM turns the Check Powertrain Lamp OFF after one ignition cycle t...

Page 81: ...does not receive it the vehicle will not start unless the PCM is in Vehicle Theft Deterrent VTD Fail Enable mode The BCM will only transmit the correct security information to the PIM if the BCM has...

Page 82: ...from the PIM prior to the theft deterrent Fuel Decision Point Action taken when DTC P1626 Sets The PCM enables the fuel injection on future ignition cycles only if the PCM is in Fail Enable Mode The P...

Page 83: ...aring the Check Powertrain Lamp and DTC P1630 The last test failed Current DTC will clear when the diagnostic runs and does not fail DTC P1631 Theft Deterrent Password Incorrect Conditionsforrunning D...

Page 84: ...open circuit measures 12 Volts while an earthed circuit measures 0 Volts The switches are opened or closed by fluid pressure The combination of which switches are open and closed is used by the PCM t...

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Page 86: ...rt All conditions are met for at least 5 seconds Condition 3 The TP angle is 8 45 The PCM commands fourth gear The TCC is locked ON The speed ratio is 0 65 0 8 speed ratio is engine speed divided by t...

Page 87: ...command to the instruments via the PIM and the serial data normal mode message commanding the instruments to turn ON the correct gear indicator lamp for the gear that is has been selected The PRNDL s...

Page 88: ...essage The PCM will command the instruments to turn on the Check Powertrain Lamp for two seconds when the ignition is first turned on and when a DTC has been set and the DTC requires the lamp to be il...

Page 89: ...pposed to the three in a waste spark arrangement Furthermore no energy is lost to the resistance of a waste spark system The ignition coil modules are fused separately for each bank of the engine are...

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Page 91: ...lts and 17 0 volts Conditions for setting DTC The PCM detects the ignition control circuit is earthed open or shorted to a voltage All conditions met for at least 15 seconds Action taken when DTC Sets...

Page 92: ...igh pressure in tank single pump is capable of providing fuel at more than 410 kPa A pressure regulator in the modular fuel sender assembly maintains the fuel pressure at a regulated pressure of 410 k...

Page 93: ...splacement Gerotor design pump similar to that commonly used in engine oil pumps that creates the high pressures required for the fuel injection system The Gerotor section contains a composite bushing...

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Page 95: ...s the strainer fabric also acts as a wick to draw sufficient fuel to the inlet of the fuel sender or pump Should the external filter screen become blocked or restrict fuel entry then the secondary umb...

Page 96: ...both in the sequence of removal and installation of a replacement filter Failure to observe these instructions will most probably result in permanent damage to the flexible line resulting in unnecess...

Page 97: ...tions for running DTC P0230 The engine speed is greater than 400 RPM The ignition voltage is between 6 0 volts and 16 0 volts Conditions for setting DTC P0230 The PCM detects that the commanded state...

Page 98: ...iding the earth circuit The injectors are never fully energised on as that would flood the engine with too much fuel The PCM supplies the earth circuit in short pulses The longer the duration of the p...

Page 99: ...e the PCM with the basic information for the fuel management portion of its operation Engine speed RPM from the crankshaft position signal and the amount of air entering the engine from the Mass Air F...

Page 100: ...tle position coolant temperature manifold air pressure mass air flow and engine speed Catalyst Protection Mode During sustained heavy loads the PCM increases the pulse width to the injectors to provid...

Page 101: ...n chambers At this time the PCM will switch from open loop to closed loop and the STFT will start to constantly monitor the oxygen sensor signals so that the PCM can modify fuel injector pulse width w...

Page 102: ...Each cell corresponds to a region on a MAP vs RPM table Each region is calibrated to a LTFT value of 0 A value of 0 in a given block indicates no fuel adjustment is needed for that engine load conditi...

Page 103: ...t valve cycling aids in obtaining maximum road surface traction in the same manner as the Anti Lock Brake mode The difference between Traction Control and Anti Lock Brake mode is that brake fluid pres...

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Page 105: ...ne running the PCM can lose track of the actual position of the IAC This will also happen if the PCM connectors fuse F31 or battery terminals are disconnected If this happens the PCM will reset the IA...

Page 106: ...one ignition cycle that the diagnostic runs and does not fail A last test failed current DTC clears when the diagnostic runs and does not fail DTC P0507 Idle Speed High Conditions for running DTC P050...

Page 107: ...ls the manifold vacuum signal from the throttle body The vapour inlet port allows fuel vapour to enter the canister from the fuel tank The atmospheric port allows fresh air to be drawn into the canist...

Page 108: ...it do not match The conditions are present for at least ten seconds Action taken when DTC P0443 Sets The PCM illuminates the Check Powertrain Lamp when the diagnostic runs and fails The PCM records th...

Page 109: ...rse inhibit solenoid 1 is energised by the PCM pulling the solenoid plunger 2 down this allows the reverse lockout plunger 3 to move enabling selection of reverse gear Above 8 km h the PCM de energise...

Page 110: ...mp to turn ON F2 Last Test Failed This DTC search will display only DTCs that failed the last time the test ran F3 Test Failed Since Code Cleared This DTC search will display all DTCs that have report...

Page 111: ...ted number of steps and cycle times and compares the initial IAC valve steps to the end IAC valve steps to determine if the IAC valve is controlling RPM properly and not losing steps Preconditions Coo...

Page 112: ...connect TECH 2 to the vehicles DLC Connect TECH 2 to DLC turn TECH 2 on at the TECH 2 title screen press ENTER and select the following F1 Service Programming System SPS F1 Program ECU F1 Program ECU...

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