Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Radiator Fan Circuit Troubleshooting - Open
- Fan motor check
-1. Test the radiator fan motor .
Is the radiator fan motor OK?
YES
Go to step 2.
NO
- Open wire check (GND line)
-1. Disconnect the following connector.
RFC unit connector B (3P) -2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode RFC unit connector B (3P): disconnected Test circuit GND Test point 1 RFC unit connector B (3P) No. 2 (BLK) Test point 2 Body ground Is there continuity?
YES
NO
Repair an open in the GND wire between the RFC unit and ground G302.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.