Inspection Procedure 5: Starting Impossible (starter operative but no initial combustion)


COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Check battery.

  • Check battery (Refer to GROUP 54A - Battery - On-vehicle Service - Battery Test ).

Q. Is the check result normal?
Go to Step 2.
Replace the battery.

STEP 2. M.U.T.-III diagnosis code

Q. Is diagnosis code set?
Inspection chart for diagnosis code (Refer to ).
Go to Step 3.

STEP 3. M.U.T.-III actuator test

  • Item 9: Fuel pump
OK: Operating sound of fuel pump can be heard

Q. Is the check result normal?
Go to Step 4.
Check Inspection Procedure - fuel pump system (Refer to ).

STEP 4. Check timing chain for breakage.

  • Engine: Cranking
OK: Camshaft rotates

Q. Is the check result normal?
Go to Step 5.
Replace the timing chain.

STEP 5. Check throttle body (throttle valve portion) contamination.

Q. Is the check result normal?
Go to Step 6.
Throttle body (throttle valve area) cleaning (Refer to ).

STEP 6. M.U.T.-III data list

  • Data list reference table (Refer to ).

    1. Item 2: Crank angle sensor

Q. Is the check result normal?
Go to Step 7.
Check code No. P0335: crank angle sensor system (Refer to ).

STEP 7. Visual check of ignition spark.

  • Remove the spark plug and install it to the ignition coil.
  • Connect the ignition coil connector.
  • Disconnect all injector connectors.
  • At the engine start, check each spark plug produces a spark.

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

STEP 8. Check spark plug.

  • Check spark plug (Refer to GROUP 16 - Ignition System - On-vehicle Service - Spark Plug Check and Cleaning ).

Q. Is the check result normal?
Check Inspection Procedure - ignition circuit system (Refer to ).
Replace the spark plug.

STEP 9. Check injector for operating sound.

  • Injector check (Refer to ).

Q. Is operating sound audible?
Go to Step 10.
Check the injector system of the defective cylinder. Check code No. P0261: No. 1 injector circuit low input (Refer to ). Check code No. P0262: No. 1 injector circuit high input (Refer to ). Check code No. P0264: No. 2 injector circuit low input (Refer to ). Check code No. P0265: No. 2 injector circuit high input (Refer to ). Check code No. P0267: No. 3 injector circuit low input (Refer to ). Check code No. P0268: No. 3 injector circuit high input (Refer to ). Check code No. P0270: No. 4 injector circuit low input (Refer to ). Check code No. P0271: No. 4 injector circuit high input (Refer to ).

STEP 10. Fuel pressure measurement.

  • Fuel pressure test (Refer to ).

Q. Is the check result normal?
Go to Step 11.
Repair.

STEP 11. Replace the engine-ECU.

  • After replacing the engine-ECU re-check the trouble symptoms.

Q. Does the trouble symptom persist?
Check for foreign matters (water, diesel fuel, etc.) in fuel and replace if necessary.
Check end.