The ETACS-ECU receives signal from the power window main switch. If signal cannot be received
at all, diagnosis code No.U1508 will be set.
COMMENT ON TROUBLE SYMPTOM
The M.U.T.-III shows a diagnosis code status as active.
Connector(s) or wiring harness in the LIN bus lines between the power window main
switch and the ETACS-ECU, the power supply system of the power window main switch, or the power
window main switch itself may be defective.
The M.U.T.-III shows a diagnosis code status as stored.
If diagnosis code No.U1508 is stored as a past trouble, carry out diagnosis with
particular emphasis on wiring and connector(s) in the LIN bus line between the power window
main switch and the ETACS-ECU, and the power supply system of the power window main switch.
For diagnosis procedures, refer to GROUP 00, How to Use Troubleshooting/Inspection
Service Points - How to Treat Past Trouble .
PROBABLE CAUSES
Malfunction of the power window main switch
Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Connector check: C-219 ETACS-ECU connector, E-03
power window main switch connector
Q.
Is the check result normal?
Go to Step 2.
Repair the defective connector. Go to Step 3.
STEP 2. Check the wiring harness between C-219 ETACS-ECU connector
terminal No.54 and E-03 power window main switch connector terminal No.4.
note
Prior to the wiring harness inspection, check joint connector C-138 and intermediate connector
C-133 <L.H. drive vehicles> or C-122 <R.H. drive vehicles>, and repair if necessary.
Check the communication line for open circuit.
Q.
Is the check result normal?
Go to Step 3.
Repair the wiring harness. Go to Step 3.
STEP 3. Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to the ETACS-ECU.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is reset.
Q.
Is the check result normal?
A poor connection, open circuit or other intermittent malfunction is present in
the LIN bus lines between the power window main switch and the ETACS-ECU (Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent
Malfunctions ).
)
.)
)
)
)
Go to Step 2.
Repair the defective connector. Go to Step 3.)
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