INSPECTION PROCEDURE F-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
If the sunroof does not work at all, these power supply circuit(s), these earth circuit(s), sunroof switch or the sunroof motor assembly (sunroof ECU) may be defective.

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.
Check that the power window lock switch is turned off.

Q. Is the check result normal?
Go to Step 2.
Turn off the power window lock switch.

Step 2. ECU check on the SWS monitor.
Check that the power supply and earth lines to the sunroof motor assembly (sunroof-ECU) and the ETACS-ECU and the SWS communication lines are normal.

  • 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?
"OK" are displayed for all the items : Go to Step 3.
"NG" is displayed on the "ETACS ECU" menu. : Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible ."
"NG" is displayed on the "SUNROOF ECU" menu. : Refer to Inspection Procedure A-6 "Communication with the sunroof motor assembly (sunroof-ECU) is not possible ."

Step 3. Check the power window main switch.
Check that all of the front passenger’s and rear door power windows can operate by means of the power window main switch.

Q. Is the check result normal?
Go to Step 4.
Refer to Inspection Procedure D-1 "Power windows do not work at all ."

Step 4. Function diagnosis by using the SWS monitor
Check the SWS communication signal, which are related to the sunroof.
<Selected item> SUNROOF OPE
  • Ignition switch: ON
Item No.
 Item name
 Normal conditions
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?
Normal conditions are displayed for all the items. : Go to Step 5.
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.72 : Refer to inspection procedure P-9 "When the sunroof switch is operated, the switch signals are not received ."

Step 5. Retest the system.
The sunroof assembly should now work normally.

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 sunroof motor assembly.