A/C Condenser Fan Motor Relay High-Speed Control System Check: Troubleshooting
WARNING:
Keep hands, tools, and clothing away from A/C condenser fan to help prevent personal injury. This fan is electric and can come on whether or not the engine is running. The fan can start automatically in response to the ECT sensor with the ignition switch in the "ON" position.
A/C CONDENSER FAN MOTOR - TROUBLESHOOTING CHART
| Step | Action | YES | NO |
|---|---|---|---|
| 1 | A/C condenser fan motor control circuit check
Is voltage 10 - 14 V? |
Go to Step 3. | Go to Step 2. |
| 2 | A/C condenser fan motor control circuit check
Is check result as specified? |
"YEL/GRN" wire or "BLU/ORN" wire is open circuit. | Faulty A/C condenser fan motor relay. |
| 3 | A/C condenser fan motor high-speed control signal check
Is A/C condenser fan motor started at high speed? |
Go to Step 7. | Go to Step 4. |
| 4 | A/C condenser fan control circuit check
Is voltage 10 - 14 V? |
Go to Step 7. | Go to Step 5. |
| 5 | A/C condenser control circuit check
Is check result as specified? |
"RED/BLK" wire, "BLU/BLK" wire are open circuit. | Faulty A/C condenser fan motor high-speed relay No.1 or No.2. |
| 6 | A/C condenser control circuit check
Is resistance below 5 Ω? |
"BLU/WHT" wire or "BLK" wire are open circuit. | Faulty A/C condenser fan motor high-speed relay No.1 or No.2. |
| 7 | A/C refrigerant pressure switch signal check
Is voltage 10 - 14 V? |
Substitute a known-good ECM and recheck. | Faulty "ORN" wire or faulty refrigerant pressure switch or faulty A/C system referring to HVAC CONTROL MODULE AND ITS CIRCUITS INSPECTION : Manual Type or HVAC CONTROL MODULE AND ITS CIRCUITS INSPECTION : Automatic Type. |