L0634

CODE NO.L0634 S/R Sensor signal

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

COMMENTS ON TROUBLE SYMPTOM

Current trouble
- If the signal from one of two lid position detection sensors cannot be detected, ETACS-ECU sets the diagnosis code No. L0634.

Past trouble
- If diagnosis code No. L0634 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

DIAGNOSTIC PROCEDURE

Diagnostic trouble code recheck

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.