Inspection Procedure 1
The Sunroof Does Not Operate When the Ignition Switch Is Turned toSunroof-ECU Power Supply And Ground Circuit:
CIRCUIT OPERATION
- The sunroof-ECU power is supplied from ignition switch (IG2).
TECHNICAL DESCRIPTION (COMMENT)
- The cause may be a malfunction of the sunroof-ECU power supply circuit system or the ground circuit system.
TROUBLESHOOTING HINTS
- Malfunction of the sunroof-ECU
- Damaged harness wires or connectors
DIAGNOSIS
STEP 1. Check the power supply line at the sunroof-ECU connector D-03.
1. Remove the headlining.
2. Disconnect the sunroof-ECU connector D-03 and measure at the harness side.
3. Turn the ignition key "ON".
4. Measure the voltage between terminal 6 and ground.
- Voltage should be approximately 12 volts (battery positive voltage).
Q: Is the voltage approximately 12 volts?
YES: Go to Step 3.
NO: Go to Step 2.
STEP 2. Check the harness wires between Ignition switch (IG2) and the sunroof-ECU connector D-03.
1. Remove the column cover.
2. Check the harness wires between ignition switch (IG2) and sunroof-ECU connector D-03.
Q: Are there any damaged wires between ignition switch (IG2) and sunroof-ECU connector D-03?
YES: Repair them, then go to Step 3.
NO: Go to Step 4.
NOTE: After inspecting intermediate connector C-27, C-73 or C-77 inspect the wire. If intermediate connector C-27, C-73 or C-77 are damaged, repair or replace them. Refer to Harness Connector Inspection. Then go to Step 3.
STEP 3. Check the harness wire between sunroof-ECU connector D-03 and ground.
Q: Is the harness wire between sunroof-ECU connector D-03 and ground damaged?
YES: Repair it, then go to Step 4.
NO: Replace the sunroof-ECU. Then go to Step 4.
NOTE: After inspecting intermediate connector C-73 inspect the wire. If intermediate connector C-73 are damaged, repair or replace them. Refer to Harness Connector Inspection. Then go to Step 4.
STEP 4. Check symptoms
Q: Does the sunroof open and close normally?
YES: This diagnosis is complete.
NO: Return to Step 1.