Inspection Procedure C-10: When the sunroof switch is operated, the switch signals are not received.
















caution Whenever the ECU is replaced, ensure that the input signal circuit is normal.

COMMENTS ON TROUBLE SYMPTOM
If the input signal from the sunroof switch is abnormal, the sunroof input check response signal will not be sent to the SWS communication line.

PROBABLE CAUSES

  • Malfunction of the sunroof assembly
  • Malfunction of the sunroof switch
  • Damaged harness wires and connectors

DIAGNOSIS 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 GROUP 42 - Troubleshooting .

STEP 2. Connector check: E-02 sunroof switch connector

Q. Is the check result normal?
Go to Step 3.
Repair the connector.

STEP 3. Check the sunroof switch.
Refer to GROUP 42 - Sunroof .

Q. Is the check result normal?
Go to Step 4.
Replace the sunroof switch.

STEP 4. Resistance measurement at E-02 sunroof switch connector.
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Continuity between E-02 sunroof switch connector terminal No.4 and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?
Go to Step 6.
Go to Step 5.

STEP 5. Check the wiring harness between E-02 sunroof motor switch connector terminal No.4 and body earth.

  • 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 Cope with Intermittent Malfunction ).
Repair the wiring harness.

STEP 6. Connector check: E-03 sunroof motor assembly 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 Nos.6, 7, 8 and E-02 sunroof switch connector terminal Nos.6, 3, 5.

  • Check the input line for open circuit.

Q. Is the check result normal?
Go to Step 8.
Repair the wiring harness.

STEP 8. Connector check: D-420 ETACS-ECU connector

Q. Is the check result normal?
Go to Step 9.
Repair the connector.

STEP 9. 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.

  • Check the communication lines for open circuit.

Q. Is the check result normal?
Go to Step 10.
Repair the wiring harness.

STEP 10. Retest the system.
Check that each switch signal is received by operating the sunroof switch.

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.