Whenever the ECU is replaced,
ensure that the input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
Current trouble
At the engine startup, if a signal reception of the rear power window sub switch
(RH) information fails, ETACS-ECU stores the diagnosis code No. 4008.
At the engine startup, if a signal reception of the rear right door window glass
position fails, ETACS-ECU sets the diagnosis code No. 4009.
Past trouble
If the diagnosis code No. 4008 or 4009 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 cope with past trouble (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service
Points - How to Treat Past Trouble ).
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 - How to Treat Past Trouble 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 - Explanation
About The M.U.T.-III CAN Bus Diagnostics ).
PROBABLE CAUSES
Malfunction of the rear power window sub switch (RH)