Inspection Procedure 2: The Engine Warning Lamp Does Not Illuminate Right after the Ignition Switch Is Turned the "ON" Position




OPERATION



PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Check indicator illumination.

Q. Does an indicator other than the engine warning lamp illuminate?
Go to Step 2 .
Inspect combination meter and related circuits (Refer to GROUP 54A - Combination Meter - Check Chart for Trouble Symptoms ).

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

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

STEP 3. Check connector: C-105 Engine-ECU connector and C-111 combination meter connector.


Q. Are the check results normal?

Go to Step 4 .

Repair or replace.

STEP 4. Perform resistance measurement for open circuit at between C-105 engine-ECU connector and C-111 combination meter connector.



  • Disconnect C-105 engine-ECU connector and C-111 combination meter connector, and measure resistance at the wiring harness.
  • Resistance between C-105 engine-ECU connector terminal No. 11 and C-111 combination connector terminal No. 63.
OK: Continuity (2 Ω or less)

Q. Is the check result normal?

Go to Step 5 .

Check the intermediate connector C-53 <L.H. drive vehicles> or C-35 <R.H. drive vehicles>, and repair if necessary. If intermediate connector is normal, repair the harness wire.

STEP 5. Check the trouble symptoms.

Q. Does trouble symptom persist?
Replace the engine-ECU. When the engine-ECU is replaced, write the chassis number (Refer to GROUP 00 - How to Perform Chassis Number Writing ). After replacing the engine-ECU, register the injector identification code and learn fuel injection (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).