Inspection Procedure 27

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 circuit or short-circuited harness wire.
- PCM failed.

DIAGNOSIS




STEP 1. Check the circuit at PCM connector C-89.
1. Disconnect connector C-89 and measure at the harness side.
2. Turn the ignition switch "ON".
3. Check the condenser fan condition.

- The fan should stop.

4. Measure voltage between terminal 18 and ground.
- Voltage should be approximately 12 volts (battery positive voltage)

5. Connect a jumper cable between 18 and ground.
- The fan should run.

If all checks above meet the specifications, go to Step 2.

If any check above does not meet the specifications, check the harness wire and connector between the PCM and A/C condenser fan motor relay, and repair or replace if necessary. Refer to vehicle level Testing and Inspection. If the harness wire and connector is in good condition, check the A/C condenser fan circuit. Refer to Diagnosis. Then check that the malfunction is eliminated.




STEP 2. Check harness connector C-89 at the PCM for damage.
If harness connector C-89 is not damaged, replace the PCM.

If harness connector C-89 is damaged, repair or replace it.
Refer to vehicle level Testing and Inspection.

Then check that the malfunction is eliminated