Inspection Procedure F-3: 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) 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

DIAGNOSTIC PROCEDURE

Step 1. Pulse check
Check the input signals from the ignition switch (IG1) and the driver’s door switch.
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?
All the signals are received normally. : Go to Step 2.
The ignition switch (IG1) signal is not received. : Refer to Inspection Procedure P-2 "The ignition switch (IG1) signal is not received ."
The driver’s door switch signal is not received. : Refer to Inspection Procedure P-4 "The driver’s door switch signal is not received ."

Step 2. Connector check: E-07 sunroof motor assembly connector

Q. Is the check result normal?

Go to Step 3.

Repair the connector.

Step 3. Voltage measurement at the E-07 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-07 sunroof motor assembly connector terminal No.2 and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 5.

Go to Step 4.

Step 4. Check the wiring harness between E-07 sunroof motor assembly connector terminal No.2 and the ignition switch (IG2).


note Prior to the wiring harness inspection, check junction block connectors C-211 and C-202, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?

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

Repair the wiring harness.

Step 5. Connector check: C-221 ETACS-ECU connector

Q. Is the check result normal?

Go to Step 6.

Repair the connector.

Step 6. Check the wiring harness between E-07 sunroof motor assembly connector terminal No.10 and C-221 ETACS-ECU connector terminal No.59.



note Prior to the wiring harness inspection, check intermediate connector C-128 and joint connector C-01, and repair if necessary.

  • Check the communication lines for open circuit.

Q. Is the check result normal?

Go to Step 7.

Repair the wiring harness.

Step 7. Retest the system.
Check that the sunroof timer function 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.