Inspection Procedure 3: The Engine Warning Lamp Remains Illuminating and Never Goes Out or Is Blinking.

OPERATION

Engine-ECU has detected failed sensor or failed actuator. Or failure is possibly caused by short circuit or other faults.

PROBABLE CAUSES

Damaged connector (Engine-ECU connector, combination meter connector)
Damaged harness (Short circuit between engine-ECU and combination meter)
Failed combination meter
Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the illuminating condition of the engine warning lamp.

Q. Is the engine warning lamp blinking?

	Carry out the small injection quantity learning procedure (Refer to GROUP 00 - Precautions Before Service - Small Injection Quantity Learning Procedure ).

	Go to Step 2 .

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. Check combination meter.

Ignition switch: ON
Disconnect C-111 combination meter connector

Q. Does the engine warning lamp go out?

Go to Step 5 .

Check combination meter (Refer to GROUP 54A - Combination Meter - Check Chart for Trouble Symptoms

).

STEP 5. Perform resistance measurement for short circuit at C-105 engine-ECU connector.

Disconnect connector, and measure at harness side.
Disconnect C-111 combination meter connector.
Voltage between terminal No. 11 and earth.

OK: 1 kΩ or more

Q. Is the check result normal?

Go to Step 6 .

Repair the harness wire.

STEP 6. Check injector identification code.

Check injector identification code (Refer to GROUP 00 - Precautions Before Service - Injector Identification code Registration Procedure ).

Q. Is the check result normal?

	Go to Step 7 .

	Register the injector ID.

STEP 7. Small injection quantity learning.

Carry out the small injection quantity learning procedure (Refer to GROUP 00 - Precautions Before Service - Small Injection Quantity Learning Procedure ).

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 ).

	The procedure is complete.