INSPECTION PROCEDURE B-1: The Sunroof does not work at All.


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

DIAGNOSTIC PROCEDURE


STEP 1. Check the power window main switch.



Q. Is the check result normal?





STEP 2. ECU check on the SWS monitor.




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

Q. Are the check result normal?







STEP 3. Function diagnosis by using the SWS monitor



<Selected item> SUNROOF OPE
  • Ignition switch: ON
Item No.
 Item name
 Normal condition
Item 30
 IG SW(IG1)
 ON
Item 72
 S/R ECU ACK
 INPUT CHECK (only momentarily when switch is operated)
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?







STEP 4. Retest the system.



Q. Is the check result normal?