Code No.U1512:
Rear panel power window-ECU time-out
TROUBLE JUDGMENT
The ETACS-ECU receives signal from the rear panel power window-ECU. If signal cannot be
received at all, diagnosis code No.U1512 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 rear panel power
window-ECU and the ETACS-ECU, the power supply system of the rear panel power window-ECU, or
the rear panel power window-ECU itself may be defective.
The M.U.T.-III shows a diagnosis code status as stored.
If diagnosis code No.U1512 is stored as a past trouble, carry out diagnosis with
particular emphasis on wiring and connector(s) in the LIN bus line between the rear panel power
window-ECU and the ETACS-ECU, and the power supply system of the rear panel power window-ECU.
For diagnosis procedures, refer to GROUP 00, How to Use Troubleshooting/Inspection
Service Points - How to Treat Past Trouble .
STEP 2. Check the wiring harness between C-219 ETACS-ECU connector
terminal No.54 and D-11 rear panel power window-ECU connector terminal No.14.
note
Prior to the wiring harness inspection, check intermediate connector C-16, 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 rear panel power window-ECU and the ETACS-ECU (Refer to GROUP
00, How to Use Troubleshooting/Inspection Service Points - How to Cope with
Intermittent Malfunctions ).
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Go to Step 2.
Repair the defective connector. Go to Step 3.)
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