Inspection Procedure 1: The sunroof does not work at all.



caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.





COMMENTS 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.

PROBABLE CAUSES



  • Malfunction of the sunroof switch
  • Malfunction of the sunroof motor assembly (sunroof-ECU)
  • Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE


STEP 1. Connector check: C-01 sunroof switch connector



Q. Is the check result normal?

Go to Step 2.

Repair the connector.

STEP 2. Check the sunroof switch.


Check that the sunroof switch works normally. Refer to .

Q. Is the check result normal?

Go to Step 3.
Replace the sunroof switch.

STEP 3. Resistance measurement at the the C-01 sunroof switch connector.



(1)Disconnect the connector, and measure at the wiring harness side.

(2)Continuity between C-01 sunroof switch connector terminal No.4 and body earth
OK: Continuity (Less than 2 Ω)

Q. Is the check result normal?

Go to Step 5.

Go to Step 4.

STEP 4. Check the wiring harness between C-01 sunroof switch connector terminal No.4 and body earth.







note Prior to the wiring harness inspection, check intermediate connector C-34, junction block connector B-213 and B-230, and repair if necessary.

  • Check the earth wires for open circuit.

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 5. Connector check: C-03 sunroof motor assembly connector



Q. Is the check result normal?

Go to Step 6.

Repair the connector.

STEP 6. Voltage measurement at the the C-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 the C-03 sunroof motor assembly connector terminal No.3 and body earth.
OK: Battery positive voltage

Q. Is the check result normal?

Go to Step 8.

Go to Step 7.

STEP 7. Check the wiring harness between C-03 sunroof motor assembly connector terminal No.3 and the ignition switch (IG2).





note Prior to the wiring harness inspection, check intermediate connector C-34, junction block connector B-208 and B-213, 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 use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

STEP 8. Voltage measurement at the the C-03 sunroof motor assembly connector.



(1)Disconnect the sunroof motor assembly connector, and measure at the harness side.

(2)Check the voltage between the C-03 sunroof motor assembly connector terminal No.6 and body earth.
OK: Battery positive voltage

Q. Is the check result normal?

Go to Step 10.

Go to Step 9.

STEP 9. Check the wiring harness between C-03 sunroof motor assembly connector terminal No.6 and the fusible link (6).






note Prior to the wiring harness inspection, check intermediate connector C-34, junction block connector B-208 and B-213, 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 use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

STEP 10. Resistance measurement at the the C-03 sunroof motor assembly connector.



(1)Disconnect the sunroof motor assembly connector, and measure at the harness side.

(2)Check the resistance between C-03 sunroof motor assembly connector terminal No.1 and body earth.
OK: Continuity (Less than 2 Ω)

Q. Is the check result normal?

Go to Step 12.

Go to Step 11.

STEP 11. Check the wiring harness between C-03 sunroof motor assembly connector terminal No.1 and body earth.







note Prior to the wiring harness inspection, check intermediate connector C-34, junction block connector B-213 and B-230, and repair if necessary.

  • Check earth line for open circuit.

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 12. Retest the system.


The sunroof assembly should now work 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 sunroof motor assembly.





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