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 6.

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
  • Sunroof ECU
"OK" is displayed on the "SUNROOF ECU" menu.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Refer to Inspection Procedure A-6 "Communication with the sunroof motor assembly (sunroof-ECU) is not possible ."

Step 4. ECU check on the SWS monitor
Check that the power supply and earth lines to the ETACS-ECU the SWS communication lines is normal.

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

Q. Is the check result normal?
Go to Step 5.
Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible ."

Step 5. SWS monitor data list
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 conditions
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.

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

  • Ignition switch: ON
  • Operate the sunroof switch.
ECUS TO BE CHECKED
  • ETACS ECU
  • P/W MODULE
  • 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 the ETACS-ECU is not possible ."
"NG" is displayed on the "P/W MODULE" menu. : Refer to Inspection Procedure A-5 "Communication with the power window main switch (power window module) 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 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 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?
Normal conditions are displayed for all the items : The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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.71 : Replace the power window main switch.
Normal condition is not displayed for item No.72 : Replace the sunroof motor assembly.