Inspection Procedure 10

Condenser Fan does not Operate.

Condenser Fan Motor Circuit Part 1:

Condenser Fan Motor Circuit Part 2:

TECHNICAL DESCRIPTION (COMMENT)
If the condenser fan does not operate, the condenser fan relay circuit system or the condenser fan motor may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the heater control
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

Required Special Tools:
- MB991223: Test Harness Set

STEP 1. Measure the voltage at condenser fan motor connector A-34.

1. Disconnect condenser fan motor connector A-34 and measure the voltage at the harness side.

2. Disconnect engine-ECU connector C-119, and earth terminal 32.
3. Turn the ignition switch to the "ON" position.

4. Measure the voltage between terminal 1 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 12.

NO: Go to Step 2.

STEP 2. Measure the voltage at condenser fan control relay (high) connector A-07X.

1. Disconnect condenser fan control relay (high) connector A-07X, and measure the voltage at the junction block 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 5.

NO: Go to Step 3.

STEP 3. Check condenser fan control relay (high) connector A-07X for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is condenser fan control relay (high) connector A-07X in good condition?

YES: Go to Step 4.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The blower motor should operate normally.

STEP 4. Check the wiring harness between condenser fan control relay (high) connector A-07X (terminal 2) and the ignition switch (IG2).

NOTE: Also check junction block connectors C-211, C-210, intermediate connector C-129 and joint connector C-101 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connectors C-211, C-210, intermediate connector C-129 or joint connector C-101 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between condenser fan control relay (high) connector A-07X (terminal 2) and the ignition switch (IG2) in good condition?

YES: It can be assumed that this malfunction is intermittent. Refer to How to Cope with intermittent Malfunctions.

NO: Repair the wiring harness. Check that the air conditioning works normally.

STEP 5. Measure the voltage at condenser fan control relay (high) connector A-07X.

1. Disconnect condenser fan control relay (high) connector A-07X, 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 8.

NO: Go to Step 6.

STEP 6. Check condenser fan control relay (high) connector A-07X for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is condenser fan control relay (high) connector A-07X in good condition?

YES: Go to Step 7.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The blower motor should operate normally.

STEP 7. Check the wiring harness between condenser fan control relay (high) connector A-07X (terminal 4) and the battery.

Q: Is the wiring harness between condenser fan control relay (high) connector A-07X (terminal 4) and the battery in good condition?

YES: It can be assumed that this malfunction is intermittent. Refer to How to Cope with intermittent Malfunctions.

NO: Repair the wiring harness. Check that the air conditioning works normally.

STEP 8. Check condenser fan control relay (high) connector A-07X and condenser fan motor connector A-34 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is condenser fan control relay (high) connector A-07X and condenser fan motor connector A-34 in good condition?

YES: Go to Step 9.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The blower motor should operate normally.

STEP 9. Check the wiring harness between condenser fan control relay (high) connector A-07X (terminal 1) and condenser fan motor connector A-34 (terminal 1).

Q: Is the wiring harness between condenser fan control relay (high) connector A-07X (terminal 1) and condenser fan motor A-34 connector (terminal 1) in good condition?

YES: Go to Step 10.

NO: Repair the wiring harness. Check that the air conditioning works normally.

STEP 10. Check condenser fan control relay (high) connector A-07X and engine control module connector C-119 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is condenser fan control relay (high) connector A-07X and engine control module connector C-119 in good condition?

YES: Go to Step 11.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The blower motor should operate normally.

STEP 11. Check the wiring harness between condenser fan control relay (high) connector A-07X (terminal 3) and engine control module connector C-119 (terminal 32).

NOTE: Also check intermediate connector A-29 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector A-29 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between condenser fan control relay (high) connector A-07X (terminal 3) and engine control module connector C-119 (terminal 32) in good condition?

YES: It can be assumed that this malfunction is intermittent. Refer to How to Cope with intermittent Malfunctions.

NO: Repair the wiring harness. Check that the air conditioning works normally.

STEP 12. Measure the voltage at condenser fan motor connector A-34.

1. Disconnect condenser fan motor connector A-34 and measure the voltage at the harness side.

2. Disconnect engine-ECU connector C-119, and earth terminal 34.
3. Turn the ignition switch to the "ON" position.

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 23.

NO: Go to Step 13.

STEP 13. Measure the voltage at condenser fan control relay (low) connector A-06X.

1. Disconnect condenser fan control relay (low) connector A-06X, and measure the voltage at the junction block side.
2. Turn the ignition switch to the "ON" position.

STEP 14. Check condenser fan control relay (low) connector A-06X for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is condenser fan control relay (low) connector A-06X in good condition?

YES: Go to Step 15.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The blower motor should operate normally.

STEP 15. Check the wiring harness between condenser fan control relay (low) connector A-06X (terminal 2) and the ignition switch (IG2).

NOTE: Also check junction block connectors C-211, C-210, intermediate connector C-129 and joint connector C-101 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connectors C-211, C-210, intermediate connector C-129 or joint connector C-101 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between condenser fan control relay (low) connector A-06X (terminal 2) and the ignition switch (IG2) in good condition?

YES: It can be assumed that this malfunction is intermittent. Refer to How to Cope with intermittent Malfunctions.

NO: Repair the wiring harness. Check that the air conditioning works normally.

STEP 16. Measure the voltage at condenser fan control relay (low) connector A-06X.

1. Disconnect condenser fan control relay (low) connector A-06X, and measure the voltage at the junction block side.

STEP 17. Check condenser fan control relay (low) connector A-06X for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is condenser fan control relay (low) connector A-06X in good condition?

YES: Go to Step 18.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The blower motor should operate normally.

STEP 18. Check the wiring harness between condenser fan control relay (low) connector A-06X (terminal 4) and the battery.

Q: Is the wiring harness between condenser fan control relay (low) connector A-06X (terminal 4) and the battery in good condition?

YES: It can be assumed that this malfunction is intermittent. Refer to How to Cope with intermittent Malfunctions.

NO: Repair the wiring harness. Check that the air conditioning works normally.

STEP 19. Check condenser fan control relay (low) connector A-06X and condenser fan motor connector A-34 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is condenser fan control relay (low) connector A-06X and condenser fan motor connector A-34 in good condition?

YES: Go to Step 20.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The blower motor should operate normally.

STEP 20. Check the wiring harness between condenser fan control relay (high) connector A-06X (terminal 1) and condenser fan motor connector A-34 (terminal 1).

Q: Is the wiring harness between condenser fan control relay (high) connector A-06X (terminal 1) and condenser fan motor A-34 connector (terminal 1) in good condition?

YES: Go to Step 21.

NO: Repair the wiring harness. Check that the air conditioning works normally.

STEP 21. Check condenser fan control relay (low) connector A-06X and engine control module connector C-119 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is condenser fan control relay (low) connector A-06X and engine control module connector C-119 in good condition?

YES: Go to Step 22.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The blower motor should operate normally.

STEP 22. Check the wiring harness between condenser fan control relay (low) connector A-06X (terminal 3) and engine control module connector C-119 (terminal 34).

NOTE: Also check intermediate connector A-29 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector A-29 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between condenser fan control relay (low) connector A-06X (terminal 3) and engine control module connector C-119 (terminal 34) in good condition?

YES: It can be assumed that this malfunction is intermittent. Refer to How to Cope with intermittent Malfunctions.

NO: Repair the wiring harness. Check that the air conditioning works normally.

STEP 23. Measure the resistance at condenser fan motor connector A-35.

1. Disconnect heater condenser fan motor connector A-35, and measure at the wiring harness side.

2. Measure the resistance between terminal 2 and ground.
- The measured value should be 2 ohms or less.

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

YES: Replace the engine control module, and check that the air conditioning works normally.

NO: Go to Step 24.

STEP 24. Check condenser fan motor connector A-35 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is condenser fan motor connector A-35 connector in good condition?

YES: Go to Step 25.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the air conditioning works normally.

STEP 25. Check the wiring condenser fan motor connector A-35 (terminal 2) and the ground.

Q: Is the wiring harness between condenser fan motor connector A-35 (terminal 2) and the ground in good condition?

YES: It can be assumed that this malfunction is intermittent. Refer to How to Cope with intermittent Malfunctions.

NO: Repair the wiring harness. Check that the air conditioning works normally.