Inspection Procedure L-5
Interior Light: The door ajar indicator lights do not illuminate or go out normallyDoor Indicator Light Circuit:
NOTE: This troubleshooting procedure requires the use of scan tool MB991958 and SWS monitor kit MB991862. For details on how to use the SWS monitor, refer to "How to use SWS monitor." How To Use SWS Monitor
CIRCUIT OPERATION
The ETACS-ECU operates the door ajar indicator light according to the following switch signals:
- Front door switch
- All door switches
TECHNICAL DESCRIPTION (COMMENT)
If the door ajar indicator light does not illuminate normally, the input circuit system from the switches or the ETACS-ECU may be defective (refer to "CIRCUIT OPERATION").
TROUBLESHOOTING HINTS
- The door switch 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
- MB991862: SWS Monitor Kit
STEP 1. Verify the dome light and the luggage area light.
If the dome light switch and the luggage area light. switch are moved to the "door interlock position", the dome light and the luggage area light. should illuminate when either door is opened.
Q: Do the dome light and the luggage area light. illuminate normally?
Both the dome light and the luggage area light. illuminate normally. : Go to Step 2.
Neither the dome light nor the luggage area light. illuminates normally. : Refer to Inspection Procedure L-1 "The dome light and luggage area light do not illuminate or go out normally"
Either the dome light or the luggage area light. illuminates normally.: Refer to Inspection Procedure L-2 "The dome light or luggage area light does not illuminate or go out normally"
STEP 2. Check the input signal by using "DATA LIST" menu of the SWS monitor.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect the DLC harness before connecting the column-ECU harness. Be sure to connect SWS monitor kit MB991862 after turning on scan tool MB991958.
Open the driver's door before checking the input signals from the front door switch (LH).
1. Connect scan tool MB991958 to the data link connector.
2. Connect SWS monitor kit MB991862 to the column switch connector.
3. Operate scan tool MB991958 according to the procedure below to display "ETACS ECU"
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "DATA LIST."
5. Select "ETACS ECU."
4. Check that normal conditions are displayed on the items described in the table.
Q: Is normal condition displayed on the "FRONT DOOR SW"?
YES : Go to Step 3.
NO : Refer to Inspection Procedure M-4 "ETACS-ECU does not receive signals from the front door switches."
STEP 3. Check the input signal by using the pulse check mode of the monitor.
Check the input signals from all the door switches:
Operate scan tool MB991958 according to the procedure below to display "PULSE CHECK."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "PULSE CHECK."
If a door (except front doors) is opened and closed, check if scan tool MB991958 sounds or not.
Q: If a door (except front doors) is opened and closed, does scan tool MB991958 sound?
YES : Go to Step 4.
NO : Refer to Inspection Procedure N-4 "ETACS-ECU does not receive any signal from all the door switches."
STEP 4. Check combination meter connector C-02, C-04 and ETACS-ECU connector C-229 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are combination meter connector C-02. C-04 and ETACS-ECU connector C-229 in good condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component(s). Refer to Harness Connector Inspection. Verify that the door ajar indicator light illuminates normally.
STEP 5. Check the wiring harness between combination meter connector C-02 (terminal 8), C-04 (terminal 34) and ETACS-ECU connector C-229 (terminals 71 and 53).
Q: Is the wiring harness between combination meter connector C-02 (terminal 8), C-04 (terminal 34) and ETACS-ECU connector C-229 (terminals 71 and 53) 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 door ajar indicator light illuminates normally.