INSPECTION PROCEDURE F-4: The sunroof inhibition function does not work normally (The sunroof operation lock warning buzzer does not sound).


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.


COMMENTS ON TROUBLE SYMPTOM
If the sunroof inhibition function does not work normally, the sunroof motor assembly, the power window main switch or the ETACS-ECU may be defective.

PROBABLE CAUSES

  • Malfunction of the power window main switch
  • Malfunction of the sunroof motor assembly
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Which does not operate normally, the sunroof inhibition or the sunroof operation lock buzzer?

Q. Which does not operate normally, the sunroof inhibition or the sunroof operation lock buzzer?
The sunroof inhibition does not work normally. : Go to Step 2.
The sunroof operation lock buzzer does not work normally. : Go to Step 4.
Neither operates normally. : Go to Step 7.

Step 2. M.U.T.-III diagnosis code
Check that the ETACS-ECU sets a diagnosis code.

Q. Is the diagnosis code set?
Go to Step 3.
Refer to diagnosis code chart .

Step 3. Check the operation of the sunroof.
Check that the sunroof works normally by using the sunroof switch.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Inspection procedure F-1 "The sunroof does not work at all ."

Step 4. Check the power supply circuit.
When the ignition switch is turned to the LOCK (OFF) position, check if the hazard warning lamps illuminate.

Q. Is the check result normal?
Go to Step 5.
Refer to inspection procedure A-2 "Check the ETACS-ECU battery power supply circuit ."

Step 5. Connector check: E-07 sunroof motor assembly connector and C-221 ETACS-ECU connector




Q. Is the check result normal?

Go to Step 6.

Repair the connector.

Step 6. Check the wiring harness between E-07 sunroof motor assembly connector terminal No.10 and C-221 ETACS-ECU connector terminal No.59.






note Prior to the wiring harness inspection, check intermediate connector C-128 and joint connector C-01, and repair if necessary.

  • Check the communication lines for open circuit.

Q. Is the check result normal?

Replace the ETACS-ECU.

Repair the wiring harness.

Step 7. Check the power supply circuit.
When the ignition switch is turned to the LOCK (OFF) position, check if the hazard warning lamps illuminate.

Q. Is the check result normal?
Go to Step 8.
Refer to inspection procedure A-2 "Check the ETACS-ECU battery power supply circuit ."

Step 8. Check the operation of the sunroof.
Check that the sunroof works normally by using the sunroof switch.

Q. Is the check result normal?
Go to Step 9.
Inspection procedure F-1 "The sunroof does not work at all."

Step 9. Confirm the operation of the power windows.
Check that each of the power windows (excluding the driver’s door) works normally by using the power window main switch.

Q. Is the check result normal?
Go to Step 10.
Inspection procedure D-4 "Passenger’s and/or rear power window(s) do not work by means of the power window main switch ."

Step 10. Confirm the operation of the power windows.
Turn on the power window lock switch. Check that neither of the power windows (excluding the driver’s door) works when the relevant power window sub switch is operated.

Q. Is the check result normal?
Replace to the power window main switch.
Go to Step 11.

Step 11. Connector check: E-07 sunroof motor assembly connector and F-05 power window main switch connector




Q. Is the check result normal?

Go to Step 12.

Repair the connector.

Step 12. Check the wiring harness between E-07 sunroof motor assembly connector terminal No.7 and F-05 power window main switch connector terminal No.11.








note Prior to the wiring harness inspection, check intermediate connector C-128, C-27 <L.H. drive vehicles>, C-14 <R.H. drive vehicles> and repair if necessary.

  • Check the communication lines for open circuit.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).

Repair the harness wire, and then go to Step 13.

Step 13. Check the diagnosis code.
When the ignition switch is turned to the LOCK (OFF) position, check that the ETACS-ECU does not set the diagnosis code.

Q. Is the diagnosis code set?
Refer to diagnosis code chart .
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).