Inspection Procedure 5: Condenser fan does not operate <Vehicles with Condenser Fan>


COMMENTS ON TROUBLE SYMPTOM
If the condenser fan does not function at all, the condenser fan motor circuit may be defective.

PROBABLE CAUSES

  • Malfunction of the fuse
  • Malfunction of the fusible link
  • Malfunction of the A/C condenser fan motor
  • Malfunction of the A/C condenser fan relay
  • Damaged harness wires and connectors
  • Malfunction of the engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III actuator test (Engine-ECU)

  • Refer to GROUP 13A - Actuator test reference table . <4G6>
Item No.13: A/C condenser fan relay

  • Refer to GROUP 13B - Actuator test reference table . <4D5>
Item No.5: Condenser fan relay

  • Refer to GROUP 13C - Actuator test reference table . <4N1>
Item No.5: Condenser fan relay

Q. Are the check results normal?
Go to Step 13.
Go to Step 2.

STEP 2. M.U.T.-III diagnosis code for other systems.
Use M.U.T.-III to check that the diagnosis code is set in the engine-ECU.

Q. Is the diagnosis code set?
Carry out the diagnosis for the diagnosis code.
Go to Step 3.

STEP 3. Check the A/C condenser fan relay.
Refer to .

Q. Is the check result normal?
Go to Step 4.
Replace A/C condenser fan relay.

STEP 4. Check the A/C condenser fan motor itself.
Refer to .

Q. Is the check result normal?
Go to Step 5.
Replace condenser fan motor (Refer to ).

STEP 5. Check the fusible link (3).

Q. Is the fusible link (3) in good condition?
Go to Step 7.
Go to Step 6.

STEP 6. Check short circuit in fusible link line between fusible link (3) and relay box connector terminal No.1.

Q. Is the check result normal?
Replace the fusible link (3).
Repair or replace the connector(s) or wiring harness.

STEP 7. Check the fuse (F8).

Q. Is the fuse (F8) in good condition?
Go to Step 9.
Go to Step 8.

STEP 8. Check short circuit in fusible link line between relay box connector terminal No.1 and A/C condenser fan motor.

Q. Is the check result normal?
Replace the fuse (F8).
Repair or replace the connector(s) or wiring harness.

STEP 9. Voltage measurement at A/C condenser fan motor connector.
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Turn the ignition switch to the "ON" position.
(3)Voltage between terminal 2 and body earth.
OK: System voltage

Q. Is the check result normal?
Go to Step 11.
Go to Step 10.

STEP 10. Check open circuit in A/C condenser fan motor line between A/C condenser fan relay and A/C condenser fan motor connector.

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Repair or replace the connector(s) or wiring harness.

STEP 11. Resistance measurement at the A/C condenser fan motor connector.
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Continuity between terminal No.1 and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?
Go to Step 13.
Go to Step 12.

STEP 12. Check open circuit in A/C condenser fan motor earth line between A/C condenser fan motor connector and body earth.

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Repair or replace the connector(s) or wiring harness.

STEP 13. Recheck the trouble symptom.

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
NO <4G6> : Replace the engine-ECU (Refer to GROUP 13A - Engine-ECU ).
NO <4D5> : Replace the engine-ECU (Refer to GROUP 13B - Engine-ECU ).
NO <4N1> : Replace the engine-ECU (Refer to GROUP 13C - Engine-ECU ).