COMMENTS ON TROUBLE SYMPTOM
The A/C-ECU power system may be defective if the air conditioner, rear window defogger, and outside/inside air selection damper motor all do not operate normally.TROUBLESHOOTING HINTS
- Damaged the wiring harness or connectors
- Malfunction of the manual air conditioner control panel (A/C-ECU)
DIAGNOSIS
Step 1. Measure the voltage at C-06 A/C-ECU connector.
- Disconnect C-06 A/C-ECU connector and measure the voltage at the harness side.
- Turn the ignition switch to the "ON" position.
- Measure the voltage between terminal 10 and earth.
OK: System voltage
Q: Is the check result normal?
YES:
Go to Step 4
.NO: Go to Step 2
.Step 3. Check the wiring harness between C-06 A/C-ECU connector (terminal 10) and the ignition switch (IG2).
NOTE: Prior to the wiring harness inspection, check junction block connectors C-205 and C-203, and repair if necessary.
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 4. Measure the resistance at C-06 A/C-ECU connector in order to check the earth circuit to the A/C-ECU.
- Disconnect C-06 A/C-ECU connector, and measure at the wiring harness side.
- Measure the resistance between terminal 12 and earth.
OK: 2 ohms or less
Q: Is the check result normal?
YES:
Replace the manual air conditioner control panel (A/C-ECU).NO: Go to Step 5
.