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 CAM bus communication line. For diagnosis procedures, refer to How to treat past trouble (Refer to GROUP 00 - 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 GROUP 00, 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 GROUP 54C - 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. Refer to

(2)Recheck if the diagnosis code is set.
..... Erase the diagnosis code.
..... Turn the ignition switch from the LOCK (OFF) position to the ON position.
..... Check if the diagnosis code is set.

Q. Is the check result normal?

	The diagnosis is complete.

	Go to Step 2.

STEP 2. Diagnosis code recheck

Recheck if the diagnosis code is set.

(1)Erase the diagnosis code.

(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.

(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

	Replace the sunroof motor assembly.

	The diagnosis is complete.