Inspection Procedure 8: Condenser fan does not operate
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COMMENTS ON TROUBLE SYMPTOM
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If the condenser fan does not function at all, the condenser fan motor circuit may be defective.
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- 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
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STEP 1. M.U.T.-III actuator test (Engine-ECU)
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Refer to GROUP 13A - Actuator Test Reference Table .
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Item No.13: A/C condenser fan relay Item No.5: Condenser fan relay
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Q.
Are the check results normal?
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Go to Step 13.
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Go to Step 2.
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STEP 2. M.U.T.-III diagnosis code for other systems.
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Use M.U.T.-III to check that the diagnosis code is set in the engine-ECU (Refer to GROUP 13A - Diagnosis Code Chart ).
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Q.
Is the diagnosis code set?
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Carry out the diagnosis for the diagnosis code.
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Go to Step 3.
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STEP 3. Check the A/C condenser fan relay.
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Refer to .
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Q.
Is the check result normal?
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Go to Step 4.
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Replace A/C condenser fan relay.
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STEP 4. Check the A/C condenser fan motor itself.
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Refer to .
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Q.
Is the check result normal?
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Go to Step 5.
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Replace condenser fan motor (Refer to ).
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STEP 5. Check the fusible link (3).
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Q.
Is the fusible link (3) in good condition?
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Go to Step 7.
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Go to Step 6.
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STEP 6. Check short circuit in fusible link line between fusible link (3) and relay box connector terminal No.1.
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Q.
Is the check result normal?
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Replace the fusible link (3).
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Repair or replace the connector(s) or wiring harness.
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STEP 7. Check the fuse (F21).
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Q.
Is the fuse (F21) in good condition?
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Go to Step 9.
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Go to Step 8.
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STEP 8. Check short circuit in fusible link line between relay box connector terminal No.1 and A/C condenser fan motor.
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Q.
Is the check result normal?
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Replace the fuse (F21).
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Repair or replace the connector(s) or wiring harness.
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STEP 9. Voltage measurement at A/C condenser fan motor connector.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Voltage between terminal 2 and body earth. OK: System voltage
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Q.
Is the check result normal?
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Go to Step 11.
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Go to Step 10.
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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.
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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Repair or replace the connector(s) or wiring harness.
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STEP 11. Resistance measurement at the A/C condenser fan motor connector.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Continuity between terminal No.1 and body earth OK: Continuity exists (2 Ω or less)
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Q.
Is the check result normal?
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Go to Step 13.
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Go to Step 12.
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STEP 12. Check open circuit in A/C condenser fan motor earth line between A/C condenser fan motor connector and body earth.
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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Repair or replace the connector(s) or wiring harness.
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STEP 13. Recheck the trouble symptom.
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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Replace the engine-ECU (Refer to GROUP 13A - Engine-ECU ).
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