Radiator Fan Circuit Troubleshooting - Open

Radiator Fan Circuit Troubleshooting (Open)

1. Test the radiator fan motor.

Is the radiator fan motor OK?

YES - Go to step 2.

NO - Replace the radiator fan motor.

2. Disconnect the radiator fan control (RFC) unit 3P connector.
3. Check for continuity between RFC unit 3P connector terminal No. 2 and body ground.





Is there continuity?

YES - Replace the RFC unit.

NO - Check for an open in the wire between RFC unit 3P connector terminal No. 2 and body ground. If the wire is OK, check for a poor ground at G301.