Inspection Procedure 9

INSPECTION PROCEDURE 9: Condenser Fan does not Operate.

Condenser Fan Motor (Part 1):

Condenser Fan Motor (Part 2):

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.

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.

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.

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.

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.

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.

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.

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.