INSPECTION PROCEDURE F-2: Any of the sunroof switch positions is defective.


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


COMMENTS ON TROUBLE SYMPTOM
If any of the sunroof switch positions is defective, the communication line between the sunroof switch and the sunroof motor assembly (sunroof-ECU) may be defective.

POSSIBLE CAUSES

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

DIAGNOSTIC PROCEDURE

Step 1. SWS monitor data list.
Check the SWS communication signal, which are related to the sunroof.
<Selected item> Front ECU·P/W·S/R
  • Ignition switch: ON
  • Operate the sunroof switch.
Item No.
 Item name
 Normal condition
Item 72
 S/R ECU ACK
 INPUT CHECK (only momentarily when switch is operated)
OK: Normal condition is displayed.

Q. Is the check result normal?
Replace the sunroof motor assembly.
Refer to inspection procedure P-9 "When the sunroof switch is operated, the switch signal are not received ."