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

COMMENT ON TROUBLE SYMPTOM

Failure is possibly caused by failed ignition circuit, failed fuel feed or other faults.

PROBABLE CAUSES

Failed battery
Timing belt broken
Failed throttle valve control system
Throttle valve fouled around
Failed ignition system
Failed fuel system
Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check battery voltage.

Measure battery voltage at cranking.

OK: 8 V or higher

Q. Is the check result normal?

	Go to Step 2 .

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

STEP 2. Confirmation of communication with M.U.T.-III.

Confirm the communication available M.U.T.-III and engine-ECU

Q. Is the check result normal?

	Go to Step 3 .

	Check engine-ECU power supply, engine control relay and ignition switch IG1 system (Refer to Inspection Procedure 21 ).

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

Q. Diagnosis code set?

	Inspection chart for diagnosis codes (Refer to ).

	Go to Step 4 .

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

Item No. 5: 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 22 ).

STEP 5. Check timing belt for breakage.

Engine: Cranking

OK: Camshaft rotates.

Q. Is the check result normal?

	Go to Step 6 .

	Replace the timing belt.

STEP 6. Check throttle body (throttle valve) 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

Refer to Data List Reference Table .

Item No. 3: Crank angle sensor

Q. Is the check result normal?

	Go to Step 8 .

	Check crank angle sensor system (Refer to Code No. P0335 ).

STEP 8. Check injector for operating sound.

Check injector for operating sound (Refer to ).

Q. Can operating sound be heard?

	Go to Step 9 .

	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 9. Visual check of ignition spark.

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

Q. Is the check result normal?

	Go to Step 10 .

	Check ignition circuit system (Refer to Inspection Procedure 24 ).

STEP 10. Fuel pressure measurement.

Fuel pressure measurement (Refer to Fuel Pressure Test ).

Q. Is the check result normal?

	Go to Step 11 .

	Repair the fuel pressure.

STEP 11. Replace the engine-ECU.

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

Q. Does trouble symptom persist?

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

	Check end.