Inspection Procedure M-2

Interior Light: The front dome light, rear dome light or luggage compartment light does not illuminate or go out normally.

Interior Lights And Luggage Compartment Light Circuit Part 1:

Interior Lights And Luggage Compartment Light Circuit Part 2:

CIRCUIT OPERATION
The ETACS-ECU operates the dome light according to the following signals:
- Ignition switch (IG1)
- Key reminder switch
- Door switch (front: LH)
- All door switches
- Door lock actuator switch (front: LH)

TECHNICAL DESCRIPTION (COMMENT)
Is the dome light does not flash normally, a burned-out dome light bulb, the input circuits from the switches described in "CIRCUIT OPERATION", the power supply line to the switches or the ETACS-ECU may be defective. Alternatively, the delay-off function may be set to "0 second" by using the configuration function.

TROUBLESHOOTING HINTS
- The key reminder switch may be defective
- The door switch may be defective
- The driver's door lock actuator switch may be defective
- The dome light may be defective
- The ETACS-ECU may be defective
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tools:
- MB991223: Harness Set
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: MUT-III USB Cable
- MB991911: MUT-III Main Harness B

STEP 1. Verify which of the front dome light, the rear dome light or the luggage compartment light does not illuminate normally.

Q: Which of the front dome light, the rear dome light or the luggage compartment light fail to illuminate normally?

Front dome light does not illuminate normally : Go to Step 2.

rear dome Light : Go to Step 8.

luggage compartment light : Go to Step 14.

STEP 2. Check front dome light connectors D-05 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is front dome light connector D-05 in good condition?

YES: Go to Step 3.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Verify that the front dome light illuminates normally.

STEP 3. Verify the front dome light bulb.

Q: Is the front dome light bulb in good condition?

YES: Go to Step 4.

NO: Replace the bulb. Verify that the front dome light illuminates normally.

STEP 4. Check the battery power supply circuit to the front dome light. Test at front dome light connector D-05.

1. Disconnect front dome light connector D-05 and measure the voltage available at the harness side of the connector.

2. Measure the voltage between terminal 1 and ground.
- The voltage should equal approximately 12 volts (battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery positive voltage)?

YES: Go to Step 7.

NO: Go to Step 5.

STEP 5. Check ETACS-ECU connector C-226 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is ETACS-ECU connector C-226 in good condition?

YES: Go to Step 6.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Verify that the front dome light illuminates normally.

STEP 6. Check the wiring harness between front dome light connector D-05 (terminal 1) and ETACS-ECU connector C-226 (terminal 6).

NOTE: Also check junction block connector C-218 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connector C-218 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection.

Q: Is the wiring harness between front dome light connector D-05 (terminal 1) and ETACS-ECU connector C-226 (terminal 6) in good condition?

YES: No action is necessary and testing is complete.

NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the front dome light illuminates normally.

STEP 7. Check the wiring harness between front dome light connector D-05 (terminal 2) and ETACS-ECU connector C-226 (terminal 5).

NOTE: Also check junction block connector C-218 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connector C-218 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection.

Q: Is the wiring harness between front dome light connector D-05 (terminal 2) and ETACS-ECU connector C-226 (terminal 5) in good condition?

YES: Replace the ETACS-ECU. Verify that the front dome light illuminates normally.

NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the front dome light illuminates normally.

STEP 8. Check rear dome light connectors D-07 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is rear dome light connector D-07 in good condition?

YES: Go to Step 9.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection.Verify that the rear dome lights illuminate normally.

STEP 9. Verify the rear dome light bulb.

Q: Is the rear dome light bulb in good condition?

YES: Go to Step 10.

NO: Replace the bulb. Verify that the rear dome lights illuminate normally.

STEP 10. Check the battery power supply circuit to the rear dome light. Test at rear dome light connector D-07.

1. Disconnect rear dome light connector D-07 and measure the voltage available at the harness side of the connector.

2. Measure the voltage between terminal 1 and ground.
- The voltage should equal approximately 12 volts (battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery positive voltage)?

YES: Go to Step 13.

NO: Go to Step 11.

STEP 11. Check ETACS-ECU connector C-226 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is ETACS-ECU connector C-226 in good condition?

YES: Go to Step 12.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection.Verify that the rear dome lights illuminate normally.

STEP 12. Check the wiring harness between rear dome light connector D-07 (terminal 1) and ETACS-ECU connector C-226 (terminal 6).

NOTE: Also check junction block connector C-218 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connector C-218 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection.

Q: Is the wiring harness between rear dome light connector D-07 (terminal 1) and ETACS-ECU connector C-226 (terminal 6) in good condition?

YES: No action is necessary and testing is complete.

NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the rear dome lights illuminate normally.

STEP 13. Check the wiring harness between rear dome light connector D-07 (terminal 2) and ETACS-ECU connector C-226 (terminal 5).

NOTE: Also check junction block connector C-218 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connector C-218 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection.

Q: Is the wiring harness between rear dome light connector D-07 (terminal 2) and ETACS-ECU connector C-226 (terminal 5) in good condition?

YES: No action is necessary and testing is complete.

NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the rear dome lights illuminate normally.

STEP 14. Check luggage compartment light connector F-02 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is luggage compartment light connector F-02 in good condition?

YES: Go to Step 15.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Verify that the luggage compartment lights illuminate normally.

STEP 15. Verify the luggage compartment light bulb.

Q: Is the luggage compartment bulb in good condition?

YES: Go to Step 16

NO: Replace the bulb. Verify that the luggage compartment lights illuminate normally.

STEP 16. Check the battery power supply circuit to the luggage compartment light. Test at luggage compartment light F-02.

1. Disconnect luggage compartment light F-02 and measure the voltage available at the harness side of the connector.

2. Measure the voltage between terminal 1 and ground.
- The voltage should equal approximately 12 volts (battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery positive voltage)?

YES: Go to Step 19.

NO: Go to Step 17.

STEP 17. Check ETACS-ECU connector C-226 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is ETACS-ECU connector C-226 in good condition?

YES: Go to Step 18.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Verify that the luggage compartment lights illuminate normally.

STEP 18. Check the wiring harness between luggage compartment light connector F-02 (terminal 1) and ETACS-ECU connector C-226 (terminal 6).

NOTE: Also check junction block connector C-217 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connector C-217 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection.

Q: Is the wiring harness between luggage compartment light connector F-02 (terminal 1) and ETACS-ECU connector C-226 (terminal 6) in good condition?

YES: No action is necessary and testing is complete.

NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the luggage compartment lights illuminate normally.

STEP 19. Check luggage compartment light switch connector F-09 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is luggage compartment light switch connector F-09 in good condition?

YES: Go to Step 20.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Verify that the luggage compartment lights illuminate normally.

STEP 20. Check the luggage compartment light switch.
Disconnect luggage compartment light switch connector F-09. Then check the continuity between the switch and ground.

Q: Is the luggage compartment light switch in good condition?

YES: Go to Step 21.

NO: Replace the luggage compartment light switch. Verify that the luggage compartment lights illuminate normally.

STEP 21. Check the wiring harness between luggage compartment light connector F-02 (terminal 2) and luggage compartment light switch connector F-09 (terminal 1).

Q: Is the wiring harness between luggage compartment light connector F-02 (terminal 2) and luggage compartment light switch connector F-09 (terminal 1) in good condition?

YES: No action is necessary and testing is complete.

NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the luggage compartment lights illuminate normally.