Inspection Procedure 27

A/C condenser fan is inoperative

A/C Condenser Fan Circuit:

CIRCUIT OPERATION
- The battery positive voltage is applied on the PCM (terminal 18) from the condenser fan motor relay.
- When the PCM switches on its power transistor, the condenser fan motor relay coil is energized, causing current to flow in the circuit.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Malfunction of the condenser fan motor relay.
- Malfunction of the condenser fan motor.
- Improper connector contact, open or short-circuited harness wire.
- PCM failed.

DIAGNOSIS




STEP 1. Check harness connector C-89 at PCM for damage.

Q: Is the harness connector in good condition?

YES: Go to Step 2.

NO: Repair or replace it. Refer to Harness Connector Inspection. Then confirm that the malfunction symptom is eliminated.




STEP 2. Check the output voltage at PCM harness side connector C-89.

1. Disconnect the connector C-89 and measure at the harness side.
2. Turn the ignition switch to the "ON" position.
3. Measure the voltage between terminal 18 and ground.
- Voltage should be battery positive voltage.

4. Check the condenser fan condition.
- When the terminal 18 is disconnected, the fan should step.
- When the terminal 18 is grounded by the jumper cable, the fan should run.

5. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the voltage and fan condition normal?

YES: Replace the PCM. Then confirm that the malfunction symptom is eliminated.

NO: Refer to Introduction to Heater, Air Conditioning and Ventilation Diagnosis.