Inspection Procedure 5: Starting Impossible (Starter Operative but No Initial Combustion)


COMMENT ON TROUBLE SYMPTOM



PROBABLE CAUSE



DIAGNOSIS PROCEDURE

STEP 1. Check battery voltage.

  • Measure battery voltage at cranking.
OK: 8 V or more

Q. Is the check result normal?
Go to STEP 2 .
Check battery (Refer to GROUP 54 - Battery - On-vehicle Service - Battery Test ).

STEP 2. Check engine -A/T-ECU communicates with M.U.T.-III.


Q. Is the check result normal?
Go to Step 3 .
Check engine-A/T-ECU power supply, engine control relay and ignition switch IG1 system (Refer to Inspection Procedure 22 ).

STEP 3. M.U.T.-III diagnosis code

Q. Is diagnosis code set?
Inspection chart for diagnosis codes (Refer to )
Go to Step 4 .

STEP 4. M.U.T.-III actuator test

  • Item 07: Fuel pump
OK: Operating sound of fuel pump can be heard.

Q. Is the check result normal?
Go to Step 5 .
Check fuel pump system (Refer to Inspection Procedure 23 ).

STEP 5. Check timing belt for breakage.

  • Engine: Cranking
OK: Camshaft rotates.

Q. Is the check result normal?
Go to Step 6 .
Replace timing belt.

STEP 6. Check throttle body (throttle valve portion) contamination.

Q. Is the check result normal?
Go to Step 7 .
Clean throttle body (throttle valve portion) (Refer to ).

STEP 7. M.U.T.-III data list
OK:
    ON (Ignition switch: ST)
    OFF (Ignition switch: ON)

Q. Is the check result normal?
Go to Step 9 .
Go to Step 8 .

STEP 8. Connector check: C-111 engine-A/T-ECU connector


Q. Is the check result normal?


    Check intermediate connector B-17, and repair if necessary. If intermediate connector is normal, check and repair harness between B-111 (terminal No. 9) inhibitor switch connector and C-111 (terminal No. 51) engine-A/T-ECU connector.

    • Check output line for open circuit.

Repair or replace.

STEP 9. M.U.T.-III data list



  • Refer to Data List Reference Table .

    1. Item 22: Crank angle sensor

Q. Is the check result normal?
Go to Step 10 .
Check crank angle sensor system (Refer to Code No. P0335 ).

STEP 10. Check injector for operating sound.

  • Check injector for operating sound (Refer to ).

Q. Can operating sound be heard?

Go to Step 11 .

    Check the injector system of the defective cylinder.
    (Refer to Code No. P0201: No. 1 injector system .)
    (Refer to Code No. P0202: No. 2 injector system .)
    (Refer to Code No. P0203: No. 3 injector system .)
    (Refer to Code No. P0204: No. 4 injector system .)

STEP 11. Check spark plug.

Q. Is the check result normal?

Go to Step 12 .
Replace spark plug.

STEP 12. Check ignition coil spark.

Q. Is the check result normal?
Go to Step 13 .

    Check ignition circuit system (Refer to Inspection Procedure 26 ).

STEP 13. Fuel pressure measurement.

  • Fuel pressure measurement (Refer to Fuel Pressure Test ).

Q. Is the check result normal?
Go to Step 14 .
Repair.

STEP 14. Replace engine-A/T-ECU

  • After replacing the engine-A/T-ECU, re-check the trouble symptom.

Q. Does the trouble symptom persist?

Check for foreign matters (water, kerosene, etc.) in fuel and replace if necessary.
Check end.