Component Tests and General Diagnostics

Radiator Fan High Speed Circuit Troubleshooting
1. Remove the fan control relay from the under-hood fuse/relay box, and test it.
Is the relay OK?
YES - Go to step 2.
NO - Replace the fan control relay.
2. Measure the voltage between the fan control relay 5P socket terminal No.5 and body ground





Is there battery voltage?
YES - Go to step 3.
NO - Replace the under-hood fuse/relay box.
3. Check for continuity between the fan control relay 5P socket terminal No.2 and body ground.





Is there continuity?
YES - Replace the under-hood fuse/relay box.
NO - Repair an open in the wire between the fan control relay 5P socket terminal No.2 and body ground. If the wire is OK, check for poor ground at G301.