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

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 ETACS-ECU

Malfunction of the sunroof motor assembly (sunroof-ECU)

Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. ECU check by using 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: Is the check result normal?

"OK" are displayed for all the items: Go to Step 2.

"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-6 "Communication with sunroof motor assembly (sunroof-ECU) is not possible

Step 2. SWS monitor data list

Check the SWS communication signal, which are related to the sunroof timer function.

<Selected item> ETACS ECU

Ignition switch: OFF

Item No.	Item name	Normal condition
Item 30	IG SW(IG1)	OFF
Item 32	DR DOOR SW	From OFF to ON

OK: Normal conditions displayed for all the items.

Q: Is the check result normal?

Normal conditions are displayed for all the items.: Go to Step 3

.
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-4 "The driver's door switch signal is not received <LH drive vehicles>

." Refer to Inspection Procedure P-4 "The driver's door switch signal is not received <RH drive vehicles>

Step 3. SWS monitor data list

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?

YES: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction

).
NO: Replace the sunroof motor assembly.