STEP 1. Check the MFI system actuator test.
STEP 2. Check the MFI system diagnostic trouble code.
STEP 3. Check the A/T system diagnostic trouble code.
STEP 4. Check the A/C system diagnostic trouble code.
STEP 5. Check the ETACS system diagnostic trouble code.
STEP 6. Check the radiator fan relay, the condenser fan relay, and the fan control relay.
STEP 7. Check the fusible link SBF3 and SBF4.
STEP 8. Check the radiator fan motor and the condenser fan motor.
STEP 9. Check of short to power supply, short to ground, open circuit and harness damage in power supply line between fusible link (SBF4) and radiator fan relay connector.
STEP 10. Check of short to power supply, short to ground, open circuit and harness damage in power supply line between fusible link (SBF3) and condenser fan relay connector.
STEP 11. Check of short to power supply, short to ground, open circuit and harness damage in power supply line between fusible link (SBF3) and fan control relay connector.
STEP 12. Check of short to power supply, short to ground, open circuit and harness damage in power supply line between radiator fan relay connector and radiator fan motor connector.
STEP 13. Check of short to power supply, short to ground, open circuit and harness damage in power supply line between radiator fan motor connector and fan control relay connector.
STEP 14. Check of short to power supply, short to ground, open circuit and harness damage in power supply line between condenser fan relay connector and condenser fan motor connector.
STEP 15. Check of short to power supply, short to ground, open circuit and harness damage in power supply and control line between fan control relay connector and condenser fan relay connector.
STEP 16. Check of short to power supply, short to ground, open circuit and harness damage in body ground line between fan control relay and body ground.
STEP 17. Check of short to power supply, short to ground, open circuit and harness damage in body ground line between condenser fan motor connector and body ground.
STEP 18. Check of short to power supply, short to ground, open circuit and harness damage in F/LO line between radiator fan relay connector and ETACS-ECU connector.
STEP 19. Check of short to power supply, short to ground, open circuit and harness damage in F/HI line between condenser fan relay connector and ETACS-ECU connector.
STEP 20. Check the ETACS system diagnostic trouble code.
STEP 21. Check the MFI system data list.
STEP 22. Check the A/C system actuator test.
STEP 23. Check the symptoms.