Inspection Procedure 3: Radiator Fan and Condenser Fan do not Operate <4B1-PHEV>




OPERATION


The engine coolant temperature sensor senses engine coolant temperature. The oil thermistor senses cooling oil temperature. The A/C control panel (A/C-ECU) determines whether the A/C switch is turned on or off. The PHEV-ECU controls the radiator and the condenser fan according to these signals.

TECHNICAL DESCRIPTION




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be stored. Prior to this diagnosis, diagnose the CAN bus lines.
  • Before replacing the ECU, ensure that the CAN bus lines is normal.

STEP 1. Check the CAN bus system diagnosis.


Using M.U.T.-III, perform CAN bus diagnosis (Refer to GROUP 54C - Explanation About The M.U.T-III CAN Bus Diagnostics ).

Q. Is the check result satisfactory?

Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting, CAN Bus Diagnostic Table ). Then go to Step 9.

STEP 2. Actuator test. <PHEV-ECU>


Using M.U.T.-III, carry out the MPI system actuator test (Refer to GROUP 54D - Troubleshooting, Actuator Test Reference Table ).

  • Item No.3: Radiator fan 1
  • Item No.4: Radiator fan 2

Q. Is the check result normal?

Go to Step 18.
Go to Step 3.

STEP 3. Check the diagnosis code. <PHEV-ECU>


Using M.U.T.-III, check PHEV-ECU diagnosis code (Refer to GROUP 54D - Troubleshooting, Diagnosis Function ).

Q. Is any diagnosis code stored?

Repair the PHEV-ECU system (Refer to GROUP 54D - Troubleshooting, Inspection Chart for Diagnosis Code ). Then go to Step 20.
Go to Step 4.

STEP 4. Check the diagnosis code. <A/C control panel (A/C-ECU)>


Using M.U.T.-III, check A/C control panel (A/C-ECU) diagnosis code (Refer to GROUP 55 - Troubleshooting, Diagnosis Function <PHEV>).

Q. Is any diagnosis code stored?

Repair the A/C control panel (A/C-ECU) system. (Refer to GROUP 55 - Troubleshooting, Inspection Chart for Diagnosis Code <PHEV>). Then go to Step 20.
Go to Step 5.

STEP 5. Check the radiator fan relay, the condenser fan relay, and the fan control relay.


Refer to .

Q. Is the check result normal?

Go to Step 6.
Replace the damaged radiator fan relay (Refer to ). Then go to Step 20.

STEP 6. Check the radiator fan motor and the condenser fan motor.


Refer to .

Q. Is the check result normal?

Go to Step 7.
Replace the damaged radiator fan motor (Refer to ). Then go to Step 20.

STEP 7. Check of short to power supply, short to earth, open circuit and harness damage in power supply line between fusible link (SBF4) and cooling fan controller 1 connector.


Q. Is the check result normal?

Go to Step 8.
Repair the connector(s) or wiring harness. Then go to Step 20.

STEP 8. Check of short to power supply, short to earth, open circuit and harness damage in power supply line between fusible link (SBF1) and cooling fan controller 2 connector.


Q. Is the check result normal?

Go to Step 9.
Repair the connector(s) or wiring harness. Then go to Step 20.

STEP 9. Check of short to power supply, short to earth, open circuit and harness damage in power supply line between cooling fan controller 1 connector and radiator fan motor connector.


Q. Is the check result normal?

Go to Step 10.
Repair the connector(s) or wiring harness. Then go to Step 20.

STEP 10. Check of short to power supply, short to earth, open circuit and harness damage in power supply line between cooling fan controller 2 connector and condenser fan motor connector.


Q. Is the check result normal?

Go to Step 11.
Repair the connector(s) or wiring harness. Then go to Step 20.

STEP 11. Check of short to power supply, short to earth, open circuit and harness damage in body earth line between cooling fan controller 1 connector and body earth.


Q. Is the check result normal?

Go to Step 12.
Repair the connector(s) or wiring harness. Then go to Step 20.

STEP 12. Check of short to power supply, short to earth, open circuit and harness damage in body earth line between cooling fan controller 2 connector and body earth.


Q. Is the check result normal?

Go to Step 13.
Repair the connector(s) or wiring harness. Then go to Step 20.

STEP 13. Check of short to power supply, short to earth, open circuit and harness damage in WTS, WTSE line between engine ECU connector and water temperature sensor connector


Q. Is the check result normal?

Go to Step 14.
Repair the connector(s) or wiring harness. Then go to Step 20.

STEP 14. Service data <engine ECU>


Using M.U.T.-III, check engine-ECU service data (Refer to GROUP 13E - Troubleshooting, Service data ).

  • Item No.6: water temperature sensor

Q. Is the check result normal?

Go to Step 15.
Replace the damaged water temperature sensor (Refer to <4B1-PHEV>). Then go to Step 20.

STEP 15. Actuator test. <engine ECU and PHEV-ECU>


Using M.U.T.-III, carry out the actuator test.

  • Item No.14: Cooling fan (Refer to GROUP 13C - Troubleshooting, Actuator Test ).
  • Item No.3: Radiator fan relay 1 actuate (Refer to GROUP 54D - Troubleshooting, Actuator Test Reference Table .)
  • Item No.4: Radiator fan relay 2actuate (Refer to GROUP 54D - Troubleshooting, Actuator Test Reference Table .)
  • Item No.10: Condenser fan relay (Refer to GROUP 55 - Troubleshooting, Actuator Test Reference Table .)

Q. Is the check result normal?

Go to Step 17.
Go to Step 16.

STEP 16. Check the cooling fan controller.


Refer to .

Q. Is the cooling fan controller in good condition?

It can be assumed that this malfunction is intermittent (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunction ).
Replace the damaged cooling fan controller. (Refer to <PHEV>).Then go to Step 20.

STEP 17. Check the fusible link SBF1 and SBF4.


Q. Is the fusible link SBF1 and SBF4 in good condition?

Go to Step 18.
Replace the damaged fusible link.Then go to Step 20.

STEP 18. Actuator test. <PHEV-ECU>


Using M.U.T.-III, carry out the MPI system actuator test (Refer to GROUP 54D - Troubleshooting, Actuator Test Reference Table ).

  • Item No.3: Radiator fan 1
  • Item No.4: Radiator fan 2

Q. Is the check result normal?

Go to Step 19.
Repair the PHEV-ECU (Refer to GROUP 54D - Troubleshooting, Inspection Chart for Diagnosis Code ). Then go to Step 20.

STEP 19. Check the symptoms.


Q. Does the radiator fan and condenser fan operate normal?

It can be assumed that this malfunction is intermittent (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunction ).
Repair the PHEV-ECU (Refer to GROUP 54D - Troubleshooting, Inspection Chart for Diagnosis Code ). Then go to Step 20.

STEP 20. Check the symptoms.


Q. Does the radiator fan and condenser fan operate normal?

The procedure is complete.
Return to Step 1.