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Inspection Procedure
6: Starting Impossible (Starter Operative but No Initial Combustion)
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COMMENT ON TROUBLE SYMPTOM
- Failure is possibly caused by failed ignition circuit, failed fuel feed or
other faults.
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PROBABLE CAUSE
- Failed idle speed control system
- Throttle valve fouled around
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| STEP 1: Check battery voltage. - Measure battery voltage at cranking.
OK: 8 V or higher
Q: Is the check result normal?
YES:
Go to STEP 2  .
NO:
Check battery (Refer to GROUP 54A -
Battery -
On-vehicle Service -
Battery
Test  ).
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| STEP 2: Check engine warning lamp for burnt out bulb Q: Is the check result normal?
YES:
Go to Step 3 .
NO:
Check engine-A/T-ECU power supply, engine control relay and ignition switch IG1
system (Refer to Inspection Procedure 23 ).
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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 actuator test OK: Operating sound of fuel pump can be heard.
Q: Is the check result normal?
YES:
Go to Step 5 .
NO:
Check fuel pump system (Refer to Inspection Procedure 24 ).
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| STEP 5. Check timing belt for breakage. OK: Camshaft rotates.
Q: Is the check result normal?
YES:
Go to Step 6 .
NO:
Replace timing belt.
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| STEP 6. Check the engine startability. - With depressing the accelerator pedal slightly, and start the engine.
Q: Is the start ability good?
YES:
Go to Step 7 .
NO:
Go to Step 8 .
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| STEP 7: Check idling speed control 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 8: MUT-II/III data list OK:
- OFF (Ignition switch: ON)
Q: Is the check result normal?
YES:
Go to Step 10 .
NO:
Go to Step 9 .
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| STEP 9: Connector check: C-111 engine-A/T-ECU connector |
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Q: Is the check result normal?
YES:
- Check intermediate connector B-19, and repair
if necessary. If intermediate connector is normal, check and repair harness between B-22 (terminal No.
9) inhibitor switch connector and C-111 (terminal No. 58) engine-A/T-ECU connector.
- Check output line for open/short circuit.
NO:
Repair.
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| STEP 10: MUT-II/III data list - Refer to Data list reference table .
- Item 22: Crank angle sensor
Q: Is the check result normal?
YES:
Go to Step 11 .
NO:
Check crank angle sensor system (Refer to Code No. 22 ).
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| STEP 11: Check injector for operating sound. - Check injector for operating sound (Refer to ).
Q: Can operating sound be heard?
YES:
Go to Step 12 .
NO:
- Check the injector system of the defective
cylinder
- (Refer to Code No. 41: injector system ).
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| STEP 12: Connector check: B-110 and B-111 ignition coil connectors |
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Q: Is the check result normal?
YES:
Go to Step 13 .
NO:
Repair.
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| STEP 13: Perform voltage measurement at each of B-110 and B-111 ignition
coil connectors. |
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- Disconnect connector, and measure at the harness side.
- Voltage between terminal No. 1 and earth.
OK: System voltage
Q: Is the check result normal?
YES:
Go to Step 15 .
NO:
Go to Step 14 .
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| STEP 14: Connector check: C-303 ignition switch connector |
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Q: Is the check result normal?
YES:
- Check intermediate connectors A-14 <LHD>,
C-116 <LHD>, C-126 <RHD>, C-203 and C-205, and repair if
necessary. Check and repair harness between C-303 (terminal No. 2) ignition switch connector
and terminal No. 1 of affected cylinder’s ignition coil connector.
- Check power supply line for open/short circuit.
NO:
Repair.
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| STEP 15: Check ignition coil spark. |
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Q: Is the check result normal?
YES:
Go to Step 16 .
NO:
- Check intermediate connectors A-14 <LHD>,
C-116 <LHD>, C-126 <RHD>, C-203 and C-205, and repair if
necessary. Check and repair harness between C-303 (terminal No. 2) ignition switch connector
and terminal No. 1 of affected cylinder’s ignition coil connector.
- Check power supply line for damage.
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| STEP 16: 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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