Inspection Procedure 2

The Sunroof does not Operate when the Sunroof Switch is Operated






CIRCUIT OPERATION
The sunroof-ECU monitors the sunroof switch status (slide open, slide closed, tilt down, tilt up) and operates the sunroof motor.

TECHNICAL DESCRIPTION (COMMENT)
The cause may be a malfunction of the sunroof switch power supply circuit system or of the ground circuit system.

TROUBLESHOOTING HINTS
- Malfunction of the sunroof-ECU
- Malfunction of the sunroof switch
- Damaged harness wires or connectors

DIAGNOSIS







STEP 1. Measure the power supply voltage at sunroof switch connector E-03.
1. Remove the headlining.
2. Disconnect sunroof switch connector E-03 and measure at the harness side.
3. Turn the ignition key "ON".
4. Measure the voltage between terminal 1 and ground, and between terminal 3 and ground.
- The measured value should be approximately 12 volts (battery positive voltage).

Q: Does the measured voltage correspond with this range?
YES: Go to Step 4.
NO: Go to Step 2.







STEP 2. Check sunroof switch connector E-03 for damage for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is sunroof switch connector E-03 damaged?
YES: Repair or replace the damaged components. Refer to Harness Connector Inspection. Then go to Step 5.
NO: Go to Step 3.







STEP 3. Check the harness wires between sunroof switch connector E-03 (terminal No.1 and 3) and sunroof-ECU connector E-07 (terminal No.4 and 5).

Q: Are there any damaged wires between sunroof switch connector E-03 (terminal No.1 and 3) and sunroof-ECU connector E-07 (terminal No.4 and 5)?
YES: Repair or replace the harness wire. Then go to Step 4.
NO: Replace the sunroof-ECU. Then go to Step 4.










STEP 4. Check the harness wire between sunroof switch connector E-03 (terminal No.4) and ground

NOTE: After inspecting intermediate connector C-01 inspect the wire. If intermediate connector C-01 is damaged, repair or replace it. Refer to Harness Connector Inspection. Then go to Step 5.

Q: Is the harness wire between sunroof switch connector E-03 (terminal No.4) and ground damaged?
YES: Repair or replace the harness wire, then go to Step 5.
NO: Replace the sunroof switch. Then go to Step 5.

STEP 5. Retest the system.

Q: Does the sunroof open and close normally?
YES: The procedure is complete.
NO: Return to Step 1.