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Inspection Procedure
7: Starting Impossible (Initial Combustion but no Complete Combustion), Starting (Long Time
to Start)
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COMMENTS ON TROUBLE SYMPTOM
- Failure is possibly caused by poor ignition, incorrect air-fuel ratio at
cranking, improper fuel pressure or other faults.
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PROBABLE CAUSE
- Failed air-fuel ratio control system
- Failed exhaust gas cleaning system
- Throttle valve fouled around
- Compression pressure improper
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| STEP 1: Check battery condition. Q: Have the battery terminal been disconnected?
YES:
After warm-up engine, idle for about 10 minutes.
NO:
Go to Step 2  .
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| STEP 2: Check battery voltage. - Measure battery voltage at cranking.
OK: 8 V or higher
Q: Is the check result normal?
YES:
Go to Step 3 .
NO:
Check battery (Refer to GROUP 54A -
Battery -
On-vehicle Service -
Battery
Test  ).
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| STEP 3: MUT-II/III diagnosis code Q: Diagnosis code set?
YES:
Inspection chart for diagnosis codes (Refer to ).
NO:
Go to Step 4 .
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| STEP 4: MUT-II/III data list - Refer to Data list reference table .
- Item 13: Intake air temperature sensor
- Item 21: Engine coolant temperature sensor
- Item 25: Barometric pressure sensor <DOHC>
Q: Are the check results normal?
YES:
Go to Step 5 .
NO:
Perform the diagnosis code classified check procedure for the sensor that has
shown an abnormal data value (Refer to Inspection Chart for Diagnosis Codes ).
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| STEP 5: Check start ability. - With depressing the accelerator pedal slightly, and start the engine.
Q: Is the start ability good?
YES:
Go to Step 6 .
NO:
Go to Step 7 .
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| STEP 6: Check idle speed control servo for operating sound. - Check idle speed control servo for operating sound (Refer to ).
Q: Is the check result normal?
YES:
Clean throttle body (throttle valve portion) (Refer to ).
NO:
Check idle speed control servo system (Refer to Inspection Procedure 30 ).
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| STEP 7: MUT-II actuator test OK: Operating sound of fuel pump can be heard.
Q: Is the check result normal?
YES:
Go to Step 8 .
NO:
Check fuel pump system (Refer to Inspection Procedure 24 ).
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| STEP 8: Check air intake from intake hose and intake manifold. Q: Is the check result normal?
YES:
Go to Step 9 .
NO:
Repair.
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| STEP 9: Check injector for operating sound. - Check injector for operating sound at engine cranking (Refer to ).
Q: Can operating sound be heard?
YES:
Go to Step 10 .
NO:
- Check the injector system of the defective
cylinder
- (Refer to Code No. 0201: No. 1 injector system ).
- (Refer to Code No. 0202: No. 2 injector system ).
- (Refer to Code No. 0203: No. 3 injector system ).
- (Refer to Code No. 0204: No. 4 injector system ).
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| STEP 10. Check timing marks of timing belt. Q: Is the check result normal?
YES:
Go to Step 11 .
NO:
Align timing marks.
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| STEP 11: Perform voltage measurement at C-111 engine-A/T-ECU connector. |
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- Measure engine-A/T-ECU terminal voltage.
- Voltage between terminal No. 66 and earth.
OK: System voltage
Q: Is the check result normal?
YES:
Go to Step 15 .
NO:
Go to Step 12 .
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| STEP 12: Connector check: C-111 engine-A/T-ECU connector |
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Q: Is the check result normal?
YES:
Go to Step 13 .
NO:
Repair.
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| STEP 13: Check harness between battery and C-111 (terminal No. 66)
engine-A/T-ECU connector. |
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NOTE: Before checking harness, check intermediate connectors A-14, C-106, C-125, C-202 and C-204,
and repair if necessary.
- Check power supply line for open/short circuit and damage.
Q: Is the check result normal?
YES:
Go to Step 14 .
NO:
Repair.
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| STEP 14: Check the trouble symptoms. Q: Does trouble symptom persist?
YES:
Replace engine-A/T-ECU.
NO:
Intermittent malfunction (Refer to GROUP 00 -
How to Use Troubleshooting/Inspection
Service Points ).
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| STEP 15: Perform voltage measurement at C-111 engine-A/T-ECU connector. |
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- Measure engine-A/T-ECU terminal voltage.
- Voltage between terminal No. 42 and earth, also between terminal No. 48 and earth.
OK: 0.5 V or less
Q: Is the check result normal?
YES:
Go to Step 17 .
NO:
Go to Step 16 .
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| STEP 16: Connector check: C-111 engine-A/T-ECU connector |
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Q: Is the check result normal?
YES:
- Check and repair harness between C-111 (terminal No.
42) engine-A/T-ECU connector and body earth.
- Check earthing line for open circuit and damage.
NO:
Repair.
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| STEP 17: Connector check: B-110 and B-111 ignition coil connectors. |
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Q: Is the check result normal?
YES:
Go to Step 18 .
NO:
Repair.
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| STEP 18: Check ignition coil spark. Q: Is the check result normal?
YES:
Go to Step 23 .
NO:
Go to Step 19 .
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| STEP 19: Check spark plug. Q: Is the check result normal?
YES:
Go to Step 20 .
NO:
Replace spark plug.
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| STEP 20: Check spark plug cable itself. - Check spark plug cable itself (Refer to GROUP 16 -
Ignition System -
On-vehicle
Service ).
Q: Is the check result normal?
YES:
Go to Step 21 .
NO:
Replace spark plug cable.
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| STEP 21: Check ignition coil itself. - Check ignition coil itself (Refer to GROUP 16 -
Ignition System -
On-vehicle
Service ).
Q: Is the check result normal?
YES:
- Go to Step 22 .
NO:
Replace ignition coil.
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| STEP 22: Check harness between terminal No. 2 of each cylinder’s
ignition coil connector and vehicle body earth. |
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- Check earthing line for open circuit and damage.
Q: Is the check result normal?
YES:
- Check and repair harness between terminal
No. 3 of each cylinder’s ignition coil connector and C-112 engine-A/T-ECU connector.
- Check signal line for open/short circuit and damage.
NO:
Repair.
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| STEP 23: Check spray condition of injector. - Check each injector for spray condition (Refer to).
Q: Is the check result normal?
YES:
Go to Step 24 .
NO:
Replace injector.
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| STEP 24: Check compression pressure. - Check compression pressure<SOHC>
(Refer to GROUP 11A -
On-vehicle
Service ).
Check compression pressure<DOHC>
(Refer to GROUP 11C -
On-vehicle
Service ).
Q: Is the check result normal?
YES:
Go to Step 25 .
NO:
Repair.
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| STEP 25: Check EGR control solenoid valve itself. - Check EGR control solenoid valve itself [Refer to GROUP 17 -
Emission
Control System -
Exhaust Gas Recirculation (EGR) System ].
Q: Is the check result normal?
YES:
Go to Step 26 .
NO:
Replace EGR control solenoid valve.
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| STEP 26: Check EGR valve itself. - Check EGR valve itself [Refer to GROUP 17 -
Emission Control
System -
Exhaust Gas Recirculation (EGR) System ].
Q: Is the check result normal?
YES:
Go to Step 27 .
NO:
Replace EGR valve.
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| STEP 27: Replace engine-A/T-ECU. - After replacing the engine-A/T-ECU, re-check the trouble symptoms.
Q: Does trouble symptom persist?
YES:
Check for foreign matters (water, kerosene, etc.) in fuel and replace if necessary.
NO:
Check end.
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