L0632

CODE NO.L0632 S/R Switch fail

CAUTION: Before replacing the ECU, ensure that the input and output signal circuits are normal.

Sunroof Switch Circuit:

COMMENTS ON TROUBLE SYMPTOM

Current trouble
- If each switch (up, open, close/down) of the sunroof switch has been ON for 60 seconds, ETACS-ECU sets the diagnosis code No. L0632.

Past trouble
- If diagnosis code No. L0632 is set as past trouble, carry out diagnosis with particular emphasis on wiring and connector(s) in the CAN bus line. For diagnosis procedures, refer to How to treat past trouble (Refer to General (Body and Chassis)-How to Use Troubleshooting/Inspection Service Points).

NOTE: For a past trouble, you cannot find it by the M.U. T.-III CAN bus diagnostics even if there is any failure in CAN bus lines. In this case, refer to General (Body and Chassis), How to Use Troubleshooting/Inspection Service Points and check the CAN bus lines. You can narrow down the possible cause of the trouble by referring to the diagnosis code, which is set regarding the CAN communication-linked ECUS (Refer to Controller Area Network-CAN Bus Line Diagnostic Flow).

PROBABLE CAUSES
- Malfunction of the sunroof motor assembly
- Malfunction of the sunroof switch
- Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

STEP 1.Check sunroof switch connector D-04 and sunroof motor assembly D-05 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are sunroof switch connector D-04 and sunroof motor assembly D-05 in good condition?

YES : Go to Step 2.

NO : Repair or replace the damaged component(s). Refer to General (Electrical), Harness Connector Inspection. Check that the sunroof works normally.

STEP 2.Check the wiring harness between sunroof switch connector D-04 (terminals No. 3, 5, 6) and sunroof motor assembly connector D-05 (terminals No. 4, 5, 10).

Q: Is the wiring harness between sunroof switch connector D-04 (terminal 3, 5, 6) and sunroof motor assembly connector D-05 (terminal No. 4, 5, 10) in good condition?

YES : Go to Step 3.

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. Check that the sunroof works normally.

STEP 3.Diagnostic trouble code recheck

Replace the sunroof switch. Recheck if the diagnostic trouble code is set.

1. Erase the diagnostic trouble code.
2. Turn the ignition switch from the LOCK (OFF) position to the ON position.
3. Check if the diagnostic trouble code is set.

Q: Is the diagnostic trouble code set?

YES : Replace the sunroof motor assembly.

NO : The procedure is complete.