Radiator Fan High Speed Circuit Troubleshooting (R18A)

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 2.


NO - Replace the fan control relay.n


2.Measure the voltage between the fan control relay 5P socket terminal No. 5 and body ground.

 

Is there battery voltage?


YES - Go to 3.


NO - Replace the under-hood fuse/relay box.n

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.n


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.n