INSPECTION PROCEDURE B-5: 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



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

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?









STEP 2. Check the operation condition of the sunroof.



Q. Is the check result normal?





STEP 3. ECU check by using the SWS monitor.




  • Ignition switch: ON
  • Operate the sunroof switch.
ECUS TO BE CHECKED
  • Sunroof ECU
OK: "OK" is displayed on the "SUNROOF ECU" menu.

Q. Is the check result normal?





STEP 4. ECU check on the SWS monitor




  • Ignition switch: ON
ECUS TO BE CHECKED
  • ETACS ECU
OK: "OK" is displayed on the "ETACS ECU" menu.

Q. Is the check result normal?





STEP 5. SWS monitor data list



Selected item ETACS-ECU
  • Ignition switch: ON
  • Power window lock switch: ON
  • Operate the sunroof switch
Item No.
 Item name
 Normal conditions
Item 43
 BUZZER
 ON
OK: Normal conditions is displayed.

Q. Is the check result normal?





STEP 6. ECU check by using the SWS monitor




  • Ignition switch: ON
  • Operate the sunroof switch.
ECUS TO BE CHECKED
  • ETACS ECU
  • P/W MODULE
  • Sunroof ECU
OK: "OK" is displayed for all the items.

Q. Are the check result normal?









STEP 7. Function diagnosis by using the SWS monitor



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 conditions
Item 30
 IG SW(IG1)
 ON
Item 43
 BUZZER
 ON
Item 71
 P/W ECU ACK
 P/W LOCK ACK
Item 72
 S/R ECU ACK
 BUZZER ACK
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?











STEP 8. Retest the system.



Q. Is the check result normal?