CAUTIONCOMMENTS ON TROUBLE SYMPTOM
If the sunroof does not work at all, these power supply circuit(s), these earth circuit(s), sunroof switch or the sunroof motor assembly (sunroof-ECU) may be defective.POSSIBLE CAUSES
- Malfunction of the sunroof switch
- Malfunction of the sunroof motor assembly (sunroof-ECU)
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Pulse check
| System switch |
Check condition |
|---|---|
| Ignition switch (IG1) |
When turned from ACC to ON |
OK: The MUT-II/III sounds or the voltmeter needle fluctuates.
Q: Is the check result normal?
YES:
Go to Step 2
.NO: Refer to Inspection Procedure P-2 "The ignition switch (IG1) signal is not received
."Step 5. Check the wiring harness between D-06 sunroof switch connector terminal No.4 and body earth.
NOTE: Prior to the wiring harness inspection, check intermediate connector C-218 <RH drive vehicles>, and repair if necessary.
- Check the earth wires for open circuit.
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: Repair the wiring harness.
Step 7. Measure the voltage at the D-09 sunroof motor assembly connector.
- Disconnect the sunroof motor assembly connector, and measure at the harness side.
- Check the voltage between the D-09 sunroof motor assembly connector terminal No.1 and body earth.
OK: Battery positive voltage
Q: Is the check result normal?
YES:
Go to Step 9.NO: Go to Step 8
.Step 8. Check the wiring harness between D-09 sunroof motor assembly connector terminal No.1 and the battery.
- Check the power supply line to the battery for open circuit.
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: Repair the wiring harness.
Step 9. Measure the voltage at the D-09 sunroof motor assembly connector.
- Disconnect the sunroof motor assembly connector, and measure at the harness side.
- Ignition switch: ON
- Check the voltage between the D-09 sunroof motor assembly connector terminal No.2 and body earth.
OK: Battery positive voltage
Q: Is the check result normal?
YES:
Go to Step 11.NO: Go to Step 10
.Step 10. Check the wiring harness between D-09 sunroof motor assembly connector terminal No.2 and the ignition switch (IG2).
NOTE: Prior to the wiring harness inspection, check junction block connectors C-210 and C-203, and repair if necessary.
- Check the power supply line to the ignition switch (IG2) for open circuit.
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: Repair the wiring harness.
Step 11. Measure the resistance at the D-09 sunroof motor assembly connector.
- Disconnect the sunroof motor assembly connector, and measure at the harness side.
- Check the resistance between D-09 sunroof motor assembly connector terminal No.5 and body earth.
OK: 2Ω
or less
Q: Is the check result normal?
YES:
Go to Step 13.NO: Go to Step 12
.Step 12. Check the wiring harness between D-09 sunroof motor assembly connector terminal No.5 and body earth.
NOTE: Prior to the wiring harness inspection, check intermediate connector C-218 <RH drive vehicles>, and repair if necessary.
- Check body earth line for open circuit.
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: Repair the wiring harness.