Inspection Procedure 9

INSPECTION PROCEDURE 9: Condenser Fan does not Operate.






























FUNCTION

The condenser turns the high-temperature and high-pressure refrigerant into liquid by cooling it down with fresh air, and it is cooled down by the air from the condenser fan.

PROBABLE CAUSES

- Malfunction of the condenser fan relay
- Malfunction of the condenser fan motor
- Malfunction of the ECM [M/T] or PCM [A/T]
- Malfunction of the harness.
- Malfunction of connector.

DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check condenser fan motor connector A-29 and ECM [M/T] or PCM [A/T] connector B-18 for loose, corroded or damaged terminals, or terminals pushed back in the connector.









Q. Is condenser fan motor connector A-29 and ECM [M/T] or PCM [A/T] connector B-18 in good condition?

YES Go to Step 2.

NO Repair or replace the connector. Harness Connector Inspection.

STEP 2. Measure the voltage at condenser fan motor connector A-29.





(1)Disconnect condenser fan motor connector A-29, and measure the voltage at the wiring harness side.
(2)Turn the ignition switch to the "ON" position.









(3)Disconnect ECM [M/T] or PCM [A/T] connector B-18 and ground harness side terminal No.5.





(4)Measure the voltage between terminal 2 and ground.

- The measured value should be approximately 12 volts (battery positive voltage).

Q. Is the measured voltage approximately 12 volts?

YES Go to Step 11.

NO Go to Step 3.

STEP 3. Check condenser fan motor connector A-29 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is condenser fan motor connector A-29 in good condition?

YES Go to Step 4.

NO Repair or replace the connector. Harness Connector Inspection.

STEP 4. Check the condenser fan relay continuity.





Follow the table below to check the condenser fan relay for continuity.





Q. Is the blower relay continuity in good condition?

YES Go to Step 5.

NO Replace the condenser fan relay.

STEP 5. Measure the voltage at condenser fan relay connector A-19X.





(1)Disconnect condenser fan relay connector A-19X, and measure the voltage at the relay box side.
(2)Turn the ignition switch to the "ON" position.





(3)Measure the voltage between terminal 2 and ground.

- The measured value should be approximately 12 volts (battery positive voltage).

Q. Is the measured voltage approximately 12 volts?

YES Go to Step 7.

NO Go to Step 6.

STEP 6. Check the wiring harness between condenser fan relay connector A-19X (terminal 2) and the ignition switch (IG2).

















NOTE:
Also check junction block connector C-202, C-203, intermediate connector C-24 and joint connector (1) C-28 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connector C-202, C-203, intermediate connector C-24 and joint connector (1) C-28 is damaged, repair or replace the connector as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between blower relay condenser fan relay connector A-19X (terminal 2) and the ignition switch (IG2) in good condition?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.

NO Repair the wiring harness.

STEP 7. Measure the voltage at condenser fan relay connector A-19X.





(1)Disconnect condenser fan relay connector A-19X, and measure the voltage at the junction block side.





(2)Measure the voltage between terminal 4 and ground.

- The measured value should be approximately 12 volts (battery positive voltage).

Q. Is the measured voltage approximately 12 volts?

YES Go to Step 9.

NO Go to Step 8.

STEP 8. Check the wiring harness between condenser fan relay connector A-19X (terminal 4) and the battery.





Q. Is the wiring harness between condenser fan relay connector A-19X (terminal 4) and the battery in good condition?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.

NO Repair the wiring harness.

STEP 9. Check the wiring harness for open circuit between condenser fan relay connector A-19X (terminal 3) and condenser fan motor connector A-29 (terminal 2).









Q. Is the wiring harness between condenser fan relay connector A-19X (terminal 3) and condenser fan motor connector A-29 (terminal 2) in good condition?

YES Go to Step 10.

NO Repair the wiring harness.

STEP 10. Check the wiring harness for open circuit between condenser fan relay connector A-19X (terminal 1) and ECM [M/T] or PCM [A/T] B-18 (terminal 5).









Q. Is the wiring harness between condenser fan relay connector A-19X (terminal 1) and ECM [M/T] or PCM [A/T] B-18 (terminal 5) in good condition?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.

NO Repair the wiring harness.

STEP 11. Measure the resistance at condenser fan motor connector A-29 in order to the ground circuit to the blower motor.





(1)Disconnect condenser fan motor connector A-29, and measure the resistance at the wiring harness side.





(2)Measure the resistance value between terminal 1 and ground.

- The measured value should be 2 ohms or less.

Q. Does the measured resistance value correspond with this range?

YES Go to Step 13.

NO Go to Step 12.

STEP 12. Check the wiring harness between condenser fan motor connector A-29 (terminal 1) and ground.





Q. Is the wiring harness between condenser fan motor connector A-29 (terminal 1) and ground in good condition?

YES It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.

NO Repair the wiring harness.

STEP 13. Check the condenser fan motor operation.





Check to be sure that the condenser fan motor operates when battery voltage is applied to terminal 2 and terminal 1 grounded.

Q. Is there any abnormal noise?

YES Replace the ECM [M/T] or PCM [A/T].

NO Replace the condenser fan motor.