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.

POSSIBLE CAUSES

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

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 5.

Step 2. Check the operation condition of the sunroof.
Check that the sunroof works normally.

Q. Is the check result normal?
Go to Step 3.
Refer to Inspection Procedure F-1 "The sunroof does not work at all ."

Step 3. ECU check by using the SWS monitor
Check that the power supply and earth lines to the ETACS-ECU and the sunroof motor assembly (incorporating sunroof-ECU) and the SWS communication lines are normal.

  • Ignition switch: ON
  • Operate the sunroof switch.
ECUS TO BE CHECKED
  • ETACS ECU
  • Sunroof ECU
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?
"OK" are displayed for all the items : Go to Step 4.
"NG" is displayed on the "ETACS ECU" menu. : Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible ."
"NG" is displayed on the "SUNROOF ECU" menu. : Refer to Inspection Procedure A-5 "Communication with sunroof motor assembly (sunroof-ECU) is not possible ."

Step 4. Function diagnosis by using the SWS monitor.
Check the SWS communication signal, which are related to the sunroof operation lock buzzer.
<Selected item> S/R- REAR S/R LOCK
  • Ignition switch: ON
  • Power window lock switch :ON
  • Operate the sunroof switch
Item No.
 Item name
 Normal condition
Item 30
 IG SW(IG1)
 ON
Item 43
 BUZZER
 ON
Item 72
 S/R ECU ACK
 BUZZER ACK
OK: Normal conditions is displayed.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.

Step 5. 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 6.
Inspection procedure D-4 "Passenger’s and/or rear power window(s) do not work by means of the power window main switch ."

Step 6. ECU check by using the SWS monitor
Check that the power supply and earth lines to the ETACS-ECU and the sunroof motor assembly (incorporating sunroof-ECU) and the SWS communication lines are normal.

  • Ignition switch: ON
  • Operate the sunroof switch.
ECUS TO BE CHECKED
  • ETACS ECU
  • Sunroof ECU
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?
"OK" are displayed for all the items : Go to Step 7.
"NG" is displayed on the "ETACS ECU" menu. : Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible ."
"NG" is displayed on the "SUNROOF ECU" menu. : Refer to Inspection Procedure A-5 "Communication with sunroof motor assembly (sunroof-ECU) is not possible ."

Step 7. SWS monitor data list.
Check the SWS communication signal, which are related to the sunroof inhibition function.
<Selected item> S/R- REAR S/R LOCK
  • Ignition switch: ON
  • Power window lock switch :ON
  • Operate the sunroof switch
Item No.
 Item name
 Normal condition
Item 30
 IG SW(IG1)
 ON
Item 43
 BUZZER
 ON
Item 72
 S/R ECU ACK
 BUZZER ACK
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?
Normal conditions are displayed for all the items : Go to Step 8.
Normal condition is not displayed for item No.30 : Refer to inspection procedure P-2 "The ignition switch (IG1) signal is not received ."
Normal condition is not displayed for item No.43 : Replace the ETACS.
Normal condition is not displayed for item No.72 : Replace the sunroof motor assembly.

Step 8. 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 9.

Repair the connector.

Step 9. 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 <LH drive vehicles>, C-14 <RH 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.