L0640

CODE NO.L0640 S/R Over load

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

COMMENTS ON TROUBLE SYMPTOM

Current trouble
- If the anti-trap function is activated consecutively five times or more, ETACS-ECU sets the diagnosis code No. L0640.

Past trouble
- If the diagnosis code No. L0640 is set as past trouble, carry out diagnosis with particular emphasis on wiring and connector(s) in the CAN bus communication 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

STEP 1.Check the sunroof fully closed position

1. Carry out the learning procedures of the sunroof fully closed position.
2. Recheck if the diagnostic trouble code is set.

a. Erase the diagnostic trouble code.
b. Turn the ignition switch from the LOCK (OFF) position to the ON position.
c. Check if the diagnostic trouble code is set.

Q: Is the check result normal?

YES : The procedure is complete.

NO : Go to Step 2.

STEP 2.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.