INSPECTION PROCEDURE A-4: Sunroof Timer Function does not work Normally.


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), 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



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 A-1 "The sunroof does not work at all <Not using SWS monitor> or inspection procedure B-1 "The sunroof does not work at all <Using SWS monitor>."

STEP 2. Pulse check


Check the input signals below, which are related to the sunroof timer function.
System switch
 Check conditions
Ignition switch (IG1)
 When turned from ACC to ON
Driver’s door switch
 When the driver’s door is opened
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Are the check result normal?

YES <All the signals are received normally.> : Go to Step 3.

NO <The ignition switch (IG1) signal is not received.> : Refer to GROUP 54A, inspection procedure C-2 "The ignition switch (IG1) signal is not received ."

NO <The driver’s door switch signals are not received.> : Refer to GROUP 54A, inspection procedure C-5 "The driver’s door switch signal is not received <LH drive vehicles> or <RH drive vehicles>."

STEP 3. Connector check: E-03 sunroof motor assembly connector


Q. Is the check result normal?

Go to Step 4.

Repair the connector.

STEP 4. Voltage measurement at the E-03 sunroof motor assembly connector.


(1)Disconnect the sunroof motor assembly connector, and measure at the harness side.
(2)Ignition switch: ON
(3)Check the voltage between E-03 sunroof motor assembly connector terminal No.2 and body earth.
OK: Battery positive voltage

Q. Is the check result normal?

Go to Step 6.

Go to Step 5.

STEP 5. Check the wiring harness between E-03 sunroof motor assembly connector terminal No.2 and the ignition switch (IG2).


note Prior to the wiring harness inspection, check junction block connectors D-403, D-410, intermediate connector D-130, and repair if necessary.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

STEP 6. Connector check: D-420 ETACS-ECU connector


Q. Is the check result normal?

Go to Step 7.

Repair the connector.

STEP 7. Check the wiring harness between E-03 sunroof motor assembly connector terminal No.10 and D-420 ETACS-ECU connector terminal No.59.


note Prior to the wiring harness inspection, check intermediate connector D-130, and repair if necessary.

Q. Is the check result normal?

Go to Step 8.

Repair the wiring harness.

STEP 8. 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 use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the ETACS-ECU.