Inspection Procedure 3

INSPECTION PROCEDURE 3: The Immobilizer Indicator Light does not Illuminate.













CIRCUIT OPERATION

The immobilizer indicator starts flashing in approximately 10 seconds after the additional key registration mode is entered. It illuminates for 3 seconds after the additional key registration of the unregistered key is completed or after the registration completion judgment of the registered key. In addition, when a read error is detected, the immobilizer indicator stops flashing after read error judgment.

TECHNICAL DESCRIPTION (COMMENT)

The immobilizer indicator light or a malfunction of the combination meter or ETACS-ECU.

TROUBLESHOOTING HINTS

- Malfunction of combination meter
- Malfunction of ETACS-ECU
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tool:

- MB991223: Harness Set


STEP 1. Check ETACS-ECU connector C-218 for loose, corroded or damaged terminals, or terminals pushed back in the connector





Q. Is ETACS-ECU connector C-218 in good condition?

YES Go to Step 2.

NO Repair or replace the component(s). Harness Connector Inspection. Confirm that scan tool MB991958 communicates normally.

STEP 2. Check the immobilizer indicator light circuit of ETACS-ECU connector C-218.





(1)Disconnect the ETACS-ECU connector C-218 and measure at the harness side.
(2)Turn the ignition switch to the "ON" position.





(3)Connect terminal 60 to the ground.

Q. Does only the immobilizer indicator light illuminate? (other indicator lights are in good condition)

YES Replace the ETACS-ECU, and then record the VIN. Then, register the encrypted code again (Refer to Encrypted Code Registration Criteria Table). Retest the system.

NO Go to Step 3.

STEP 3. Check ETACS-ECU connector C-218 and combination meter connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector.









Q. Are ETACS-ECU connector C-218 and combination meter connector C-04 in good condition?

YES Go to Step 4.

NO Repair or replace the component(s). Harness Connector Inspection. Confirm that the immobilizer indicator light illuminates normally.

STEP 4. Check the wiring harness between combination meter connector C-04 (terminal 5) and ETACS-ECU connector C-218 (terminal 60).

- Check the signal line for open circuit.









Q. Is the wiring harness between combination meter connector C-04 (terminal 5) and ETACS-ECU connector C-218 (terminal 60) in good condition?

YES Go to Step 5.

NO Repair the wiring harness. Confirm the immobilizer indicator light illuminates normally.

STEP 5. Measure the voltage at combination meter connector C-04 in order to check the battery circuit of power supply system to the combination meter.

(1)Turn the ignition switch to the "LOCK" (OFF) position.





(2)Disconnect combination meter connector C-04, and measure at the wiring harness side.





(3)Measure the voltage between terminal 10 and ground.

- The measured value should be approximately 12 volts (battery positive voltage).

Q. Is measured voltage approximately 12 volts?

YES Go to Step 8.

NO Go to Step 6.

STEP 6. Check combination meter connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is combination meter connector C-04 in good condition?

YES Go to Step 7.

NO Repair or replace the component(s). Harness Connector Inspection. Confirm the immobilizer indicator light illuminates normally.

STEP 7. Check the wiring harness between combination meter connector C-04 (terminal 10) and the battery.





NOTE:
Also check intermediate connector C-24 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-24 is damaged, repair or replace it. Harness Connector Inspection.

Q. Is the wiring harness between combination meter connector C-04 (terminal 10) and the battery in good condition?

YES Go to Step 8.

NO Repair the wiring harness. Check to see that all meters operate.

STEP 8. Retest the system.

Q. Is the malfunction eliminated?

YES The procedure is complete. (If no malfunctions are found in all steps, an intermittent malfunction is suspected. How to Cope With Intermittent Malfunctions).
NO Replace the combination meter.