Inspection Procedure M-2
Interior Light: The front dome light, the rear dome lightInterior Lights And Luggage Compartment Light Circuit Part 1:
CIRCUIT OPERATION
The ETACS-ECU operates the dome light according to the following signals:
- Ignition switch (IG1)
- Key reminder switch
- Front door switch
- All door switches
- Driver's door lock actuator switch
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 on the scan tool.
TROUBLESHOOTING HINTS
- Trouble in input signal system
- 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
- MB992006: Extra Fine Probe
STEP 1. Verify which of the front dome light, the rear dome light
Q: Which of the front dome light, the rear dome light
The front dome light: Go to Step 2.
The rear dome light
The luggage compartment light: Go to Step 12.
STEP 2. Check front dome light connectors D-05 and junction block connector C-218 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are front dome light connector D-05 and junction block connector C-218 in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged components). 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 front dome light bulb. Verify that the front dome light illuminates normally.
STEP 4. Check the battery power supply circuit to the front dome light. Measure the voltage 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 6.
NO: Go to Step 5.
STEP 5. Check the wiring harness between front dome light connector D-05 (terminal 1) and junction block connector C-218 (terminal 3).
Q: Is the wiring harness between front dome light connector D-05 (terminal 1) and junction block connector C-218 (terminal 3) in good condition?
YES: Replace the front dome light. 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 6. Check the wiring harness between front dome light connector D-05 (terminal 2) and junction block connector C-218 (terminal 1).
Q: Is the wiring harness between front dome light connector D-05 (terminal 2) and junction block connector C-218 (terminal 1) in good condition?
YES: Replace the front dome light. 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 7. Check rear dome light connectors D-07 and junction block connector C-218 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are rear dome light connector D-07 and junction block connector C-218 in good condition?
YES: Go to Step 8.
NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Verify that the front dome light illuminates normally.
STEP 8. Verify the rear dome light bulb.
Q: Is the rear dome light bulb in good condition?
YES: Go to Step 9.
NO: Replace the bulb. Verify that the rear dome lights illuminate normally.
STEP 9. Check the battery power supply circuit to the rear dome light. Measure the voltage 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 11.
NO: Go to Step 10.
STEP 10. Check the wiring harness between rear dome light connector D-07 (terminal 1) and junction block connector C-218 (terminal 3).
Q: Is the wiring harness between rear dome light connector D-07 (terminal 1) and junction block connector C-218 (terminal 3) in good condition?
YES: Replace the rear dome light. 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 rear dome lights illuminate normally.
STEP 11. Check the wiring harness between rear dome light connector D-07 (terminal 2) and junction block connector C-218 (terminal 1).
Q: Is the wiring harness between rear dome light connector D-07 (terminal 2) and junction block connector C-218 (terminal 1) in good condition?
YES: Replace the rear dome light. 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 rear dome lights illuminate normally.
STEP 12. 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 13.
NO: Repair or replace the damaged components). Refer to Harness Connector Inspection. Verify that the luggage compartment lights illuminate normally.
STEP 13. Verify the luggage compartment light bulb.
Q: Is the luggage compartment bulb in good condition?
YES: Go to Step 14.
NO: Replace the luggage compartment light bulb. Verify that the luggage compartment lights illuminate normally.
STEP 14. Check the battery power supply circuit to the luggage compartment light. Measure the voltage 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 17.
NO: Go to Step 15.
STEP 15. Check junction block connector C-217 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is junction block connector C-217 in good condition?
YES: Go to Step 16.
NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Verify that the luggage compartment lights illuminate normally.
STEP 16. Check the wiring harness between luggage compartment light connector F-02 (terminal 1) and junction block connector C-217 (terminal 11).
Q: Is the wiring harness between luggage compartment light connector F-02 (terminal 1) and junction block connector C-217 (terminal 11) in good condition?
YES: Replace the luggage compartment light. 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 luggage compartment lights illuminate normally.
STEP 17. 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 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 luggage compartment light switch.
Disconnect luggage compartment light switch connector F-09. Then check the continuity between the switch and switch body.
Q: Is the luggage compartment light switch in good condition?
YES: Go to Step 19.
NO: Replace the luggage compartment light switch. Verify that the luggage compartment lights illuminate normally.
STEP 19. 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: Replace the luggage compartment light. 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 luggage compartment lights illuminate normally.