Inspection Procedure F-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.

POSSIBLE CAUSES

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

DIAGNOSTIC PROCEDURE

Step 1. Check the power window main switch.
Check that the power window lock switch is turned off.

Q. Is the check result normal?
Go to Step 2.
Turn off the power window lock switch.

Step 2. Pulse check
Check the input signals from the ignition switch (IG1) and the sunroof switch.
System switch
 Check conditions
Ignition switch (IG1)
 When turned from ACC to ON
sunroof switch
 When the sunroof switch is opened or closed
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 3.
The ignition switch (IG1) signal is not received. : Refer to Inspection Procedure P-2 "The ignition switch (IG1) signal is not received ."
The sunroof switch signal is not received. : Refer to Inspection Procedure P-9 "When the sunroof switch is operated, the switch signals are not received ."

Step 3. Check the power window main switch.
Check that all of the front passenger’s and rear door power windows can operate by means of the power window main switch.

Q. Is the check result normal?
Go to Step 4.
Refer to Inspection Procedure D-1 "Power windows do not work at all ."

Step 4. Connector check: E-07 sunroof motor assembly connector

Q. Is the check result normal?

Go to Step 5.

Repair the connector.

Step 5. Voltage measurement at the E-07 sunroof motor assembly connector.

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

(2)Check the voltage between the E-07 sunroof motor assembly connector terminal No.1 and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 7.

Go to Step 6.

Step 6. Check the wiring harness between E-07 sunroof motor assembly connector terminal No.1 and the fusible link (5).



note Prior to the wiring harness inspection, check intermediate connector C-124 and C-128, 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 7. 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 the E-07 sunroof motor assembly connector terminal No.2 and body earth.
OK: System voltage

Q. Is the check result normal?

Go to Step 9.

Go to Step 8.

Step 8. 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 9. Resistance measurement at the E-07 sunroof motor assembly connector.

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

(2)Check the resistance between E-07 sunroof motor assembly connector terminal No.5 and body earth.
OK: 2Ω or less

Q. Is the check result normal?

Go to Step 11.

Go to Step 10.

Step 10. Check the wiring harness between E-07 sunroof motor assembly connector terminal No.5 and body earth.


  • Check body earth 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 11. 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 Cope with Intermittent Malfunction ).
Replace the sunroof motor assembly.