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Inspection When Radiator Fans Do Not Rotate (A)

WARNING: This page is about a different variant/trim than selected.
  1. CHECK POWER SUPPLY CIRCUIT  .

    Check the power supply circuit.

    Is the power supply circuit normal?

    Yes  : Go to  2.

    No 

    1. Repair the defective part.
    2. Restore the vehicle to its original state.
  2. CHECK SUB FAN FUSE  .
    1. Disconnect the ground terminal from battery. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
    2. Remove the sub fan fuse.
    3. Check sub fan fuse.

    Is the sub fan fuse OK?

    Yes  : Go to  3.

    No  : Go to  14.

  3. CHECK SUB FAN RELAY  .
    1. Remove the sub fan relay. Ref. to COOLING (H4DO (HEV))>RADIATOR FAN RELAY>LOCATION .
    2. Perform unit check for the sub fan relay. Ref. to COOLING (H4DO (HEV))>RADIATOR FAN RELAY>INSPECTION .

    Is the sub fan relay OK?

    Yes  : Go to  4.

    No 

    1. Replace the sub fan relay.
    2. Restore the vehicle to its original state.
  4. CHECK MAIN FAN RELAY 2  .
    1. Remove the main fan relay 2. Ref. to COOLING (H4DO (HEV))>RADIATOR FAN RELAY>LOCATION .
    2. Perform unit check for the main fan relay 2. Ref. to COOLING (H4DO (HEV))>RADIATOR FAN RELAY>INSPECTION .

    Is the main fan relay 2 OK?

    Yes  : Go to  5.

    No 

    1. Replace the main fan relay 2.
    2. Restore the vehicle to its original state.
  5. CHECK SUB FAN MOTOR  .
    1. Disconnect the connector from the sub fan motor.
    2. Connect the battery terminal to the sub fan motor.

    Does the sub fan motor rotate properly?

    Yes  : Go to  6.

    No 

    1. Replace the sub fan motor. Ref. to COOLING (H4DO (HEV))>RADIATOR FAN AND FAN MOTOR ASSEMBLY .
    2. Restore the vehicle to its original state.
  6. CHECK MAIN FAN MOTOR  .
    1. Disconnect the connector from the main fan motor.
    2. Connect the battery terminal to the main fan motor.

    Does the main fan motor rotate properly?

    Yes  : Go to  7.

    No 

    1. Replace the main fan motor. Ref. to COOLING (H4DO (HEV))>RADIATOR FAN AND FAN MOTOR ASSEMBLY .
    2. Restore the vehicle to its original state.
  7. CONTINUITY CHECK OF HARNESS BETWEEN MAIN FAN MOTOR AND CHASSIS GROUND  .

    Check continuity of harness between the main fan motor and chassis ground.

    Is there continuity?

    Yes  : Go to  8.

    No 

    1. Repair the harness between the main fan motor and chassis ground.
    2. Restore the vehicle to its original state.
  8. CONTINUITY CHECK OF HARNESS BETWEEN MAIN FAN RELAY 2 AND MAIN FAN MOTOR  .

    Check continuity of harness between main fan relay 2 and the main fan motor.

    Is there continuity?

    Yes  : Go to  9.

    No 

    1. Repair the harness between main fan relay 2 and the main fan motor.
    2. Restore the vehicle to its original state.
  9. CONTINUITY CHECK OF HARNESS BETWEEN SUB FAN MOTOR AND MAIN FAN RELAY 2  .

    Check continuity of harness between the sub fan motor and the main fan relay 2.

    Is there continuity?

    Yes  : Go to  10.

    No 

    1. Repair the harness between the sub fan motor and the main fan relay 2.
    2. Restore the vehicle to its original state.
  10. CONTINUITY CHECK OF HARNESS BETWEEN SUB FAN RELAY AND SUB FAN MOTOR  .

    Check continuity of harness between sub fan relay and sub fan motor.

    Is there continuity?

    Yes  : Go to  11.

    No 

    1. Repair the harness between sub fan relay and sub fan motor.
    2. Restore the vehicle to its original state.
  11. CONTINUITY CHECK OF HARNESS BETWEEN SUB FAN FUSE AND SUB FAN RELAY  .

    Check continuity of harness between sub fan fuse and sub fan relay.

    Is there continuity?

    Yes  : Go to  12.

    No 

    1. Repair the harness between sub fan fuse and sub fan relay.
    2. Restore the vehicle to its original state.
  12. CHECK CONTINUITY IN HARNESS BETWEEN UNIT+B FUSE AND SUB FAN RELAY  .

    Check the continuity in harness between UNIT+B fuse and sub fan relay.

    Is there continuity?

    Yes  : Go to  13.

    No 

    1. Repair the harness between UNIT+B fuse and sub fan relay.
    2. Restore the vehicle to its original state.
  13. CONTINUITY CHECK OF HARNESS BETWEEN SUB FAN RELAY AND ECM  .
    1. Disconnect the ECM connector. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (HEV))>ENGINE CONTROL MODULE (ECM)>REMOVAL .
    2. Check continuity of harness between sub fan relay and ECM.

    Is there continuity?

    Yes 

    1. Check for poor contact of the connectors due to wear damage of connector pins. If they are OK, replace the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (HEV))>ENGINE CONTROL MODULE (ECM) .
    2. Restore the vehicle to its original state.

    No 

    1. Repair the harness between sub fan relay and ECM.
    2. Restore the vehicle to its original state.
  14. CHECK SUB FAN RELAY  .
    1. Remove the sub fan relay. Ref. to COOLING (H4DO (HEV))>RADIATOR FAN RELAY>LOCATION .
    2. Perform unit check for the sub fan relay. Ref. to COOLING (H4DO (HEV))>RADIATOR FAN RELAY>INSPECTION .

    Is the sub fan relay OK?

    Yes  : Go to  15.

    No 

    1. Replace the sub fan relay.
    2. Replace the sub fan fuse.
    3. Restore the vehicle to its original state.
  15. INSULATION CHECK OF HARNESS BETWEEN SUB FAN FUSE AND SUB FAN RELAY  .

    Check insulation of harness and chassis ground between sub fan fuse and sub fan relay.

    Are they insulated?

    Yes 

    1. Replace the sub fan fuse.
    2. Restore the vehicle to its original state.

    No 

    1. Repair the harness between sub fan fuse and sub fan relay.
    2. Replace the sub fan fuse.
    3. Restore the vehicle to its original state.
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