INSPECTION PROCEDURE F-3: Sunroof timer function does not work normally. <Except vehicles for Australia and New Zealand>


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


COMMENTS ON TROUBLE SYMPTOM
If the sunroof timer function does not work, the input circuit from the ignition switch (IG1) or the driver’s door switch, the communication lines between the ETACS-ECU and the sunroof motor assembly (sunroof-ECU), the sunroof motor assembly (sunroof-ECU) or the ETACS-ECU may be defective.

POSSIBLE CAUSES

  • Malfunction of the driver’s door switch
  • Malfunction of ETACS-ECU
  • Malfunction of the sunroof motor assembly (sunroof-ECU)
  • Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Check the operation condition of the sunroof.
Check that the sunroof works normally.

Q. Is the check result normal?
Go to Step 2.
Refer to Inspection Procedure F-1 "The sunroof does not work at all ."

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: OFF
  • Operate the sunroof switch.
note Operate the sunroof switch within the timer period after the ignition switch is turned off.
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 ETACS-ECU is not possible ."
"NG" is displayed on the "SUNROOF ECU" menu. : Refer to Inspection Procedure A-5 "Communication with sunroof motor assembly (sunroof-ECU) is not possible ."

Step 3. 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 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?
Go to Step 4.
Replace the sunroof motor assembly.

Step 4. SWS monitor data list
Check the SWS communication signal, which are related to the sunroof timer function.
<Selected item> ETACS ECU
  • Ignition switch: OFF
  • Driver’s door: Close → Open
Item No.
 Item name
 Normal condition
Item 30
 IG SW(IG1)
 OFF
Item 32
 DR DOOR SW
 from OFF to ON
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.32. : Refer to inspection procedure P-5 "The driver’s door switch signal is not received <LH drive vehicles> or <RH drive vehicles>."

Step 5. Retest the system.
After the sunroof motor assembly is replaced, check that the sunroof timer function works normally.
(1)Replace the sunroof motor assembly.
(2)Check that the sunroof timer function works 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 ETACS-ECU.