Inspection When Main Fan And Sub Fan Do Not Stop

1. Disconnect the ground terminal from battery. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
2. Remove the sub fan relay. Ref. to COOLING (H4DO(HEV))>RADIATOR FAN RELAY>LOCATION .
3. 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  2.

No: 

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

1. Connect the battery ground terminal. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
   NOTE: Sub fan relay is removed.
2. Turn to IG ON.
3. Check the radiator fan operation.

Do the sub fan motor and the main fan motor rotate?

Yes: 

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

No:  Go to  3.

1. Disconnect the ground terminal from battery. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
2. Disconnect the ECM connector. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO(HEV))>ENGINE CONTROL MODULE (ECM)>REMOVAL .
3. Check the insulation of harness and chassis ground between sub fan relay - ECM and A/C control module.

Are they insulated?

Yes: 

1. Replace the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO(HEV))>ENGINE CONTROL MODULE (ECM) .
2. Restore the vehicle to its original state.

No:  Go to  4.

1. Disconnect the A/C control module connector. Ref. to AIR CONDITIONER (HEV)>CONTROL PANEL>REMOVAL .
2. Check the insulation of harness and chassis ground between sub fan relay - ECM and A/C control module.

Are they insulated?

Yes: 

1. Replace the A/C control module. Ref. to AIR CONDITIONER (HEV)>CONTROL PANEL .
2. Restore the vehicle to its original state.

No: 

1. Repair the harness between sub fan relay - ECM and A/C control module.
2. Restore the vehicle to its original state.