YH4
GRAND
VITARA
ENGINE (H25 ENGINE)
6-1-111
SYSTEM/ CIRCUIT DESCRIPTION
Refer to “ENGINE AND EMISSION CONTROL” section.
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
TROUBLE AREA
Idle engine speed is lower than desired engine speed
100 r / min. though IAC valve opening is about 100 %.
Idle engine speed is higher than desired engine speed
200 r / min. though IAC valve opening is about 0 %.
IAC valve monitor voltage is high.
IAC valve or its circuit
Air intake system
VSS
Engine mechanical
External load
ECM (PCM)
DTC CONFIRMATION PROCEDURE
NOTE:
Check to make sure that following conditions are satisfied when using this DTC CONFIRMATION PROCE-
DURE.
Intake air temperature: between – 14 C and 70 C (6.8 F and 158 F)
Atmospheric pressure: higher than 560 mmHg (Altitude: lower than 2790 m (9150 ft))
(1) With ignition switch OFF, connect scan tool.
(2) Turn ON ignition switch and clear DTC by using scan tool if any.
(3) Start engine and warm up to normal operating temperature.
(4) Run engine at idle speed for 30 sec.
(5) Check DTC and pending DTC by using scan tool.
DTC TROUBLESHOOTING
STEP
ACTION
YES
NO
1
Was “ENGINE DIAG. FLOW TABLE” performed?
Go to Step 2.
Go to “ENGINE
DIAG. FLOW
TABLE”.
2
Idle Speed check:
(1) Check idle speed and idle air control duty referring
to “ENGINE AND EMISSION CONTROL” section.
Are they in good condition?
Intermittent trouble.
If OK, substitute a
known-good ECM
(PCM) and recheck.
Go to Step 3.
3
IAC Valve inspection:
(1) Inspect IAC valve referring to “ENGINE AND
EMISSION CONTROL” section.
Is it in good condition?
Go to Step 6.
Go to Step 4.
4
IAC Valve Circuit check:
(1) With ignition switch OFF, disconnect ECM (PCM)
couplers.
(2) Check resistance between C51-2-14 and
C51-2-15, C51-2-24 and C51-2-25.
Is each resistance 40 – 48
?
Go to Step 5.
Faulty “Lg / B”, “V / B”,
“Gr / Bl” or “V / Y” wire.
If OK, faulty IAC
valve.
5
IAC Valve Power Supply Voltage check:
(1) Connect ECM (PCM) couplers.
(2) With ignition switch OFF, disconnect C29 coupler
(1) of IAC valve.
(3) With ignition switch ON, check voltage between
C29-2 (b) and ground, C29-5 (e) and ground.
Is each voltage 10 – 14 V?
IAC valve or ECM
(PCM) malfunction.
Faulty “Bl / B” wire.
Содержание 2000 Grand Vitara SQ416
Страница 75: ...ENGINE DIAGNOSIS G16 J20 ENGINES 6 71 Fig 1 for Step 3...
Страница 179: ...6 1 68 ENGINE H25 ENGINE a Fig for STEP 2 3 a HO2S heater relay...
Страница 190: ...ENGINE H25 ENGINE 6 1 79 a Fig for STEP 2 3 a HO2S heater relay...
Страница 205: ...6 1 94 ENGINE H25 ENGINE Fig for STEP 4 1 Disconnected CMP sensor coupler 2 BI B wire terminal 3 Gr Y wire terminal...
Страница 541: ...6E1 4 ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES G16 ENGINE...
Страница 542: ...ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES 6E1 5...
Страница 543: ...6E1 6 ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES J20 ENGINE...
Страница 544: ...ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES 6E1 7...
Страница 549: ...Or W Bl G Bl Y C51 1 22 C51 1 23 C51 1 10 C51 1 11 6E1 12 ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES...
Страница 552: ...ENGINE AND EMISSION CONTROL SYSTEM G16 J20 ENGINES 6E1 15...
Страница 592: ...6E2 4 ENGINE AND EMISSION CONTROL SYSTEM H25 ENGINE...
Страница 593: ...ENGINE AND EMISSION CONTROL SYSTEM H25 ENGINE 6E2 5...
Страница 597: ...ENGINE AND EMISSION CONTROL SYSTEM H25 ENGINE 6E2 9...
Страница 661: ...IGNITION SYSTEM FOR J20 H25 ENGINES 6F2 13 INSTALLATION For installation reverse removal procedure...
Страница 723: ...6H 30 CHARGING SYSTEM 17 Make sure that rotor turns smoothly...
Страница 729: ...Prepared by Overseas Service Department 1st Ed April 2000 Printed in Japan Printing April 2000 736...