Non-Trouble Code Procedures

Radiator Fan High Speed Circuit Troubleshooting
1. Remove the radiator fan relay from the under-hood fuse/relay box, and test it.
Is the relay OK?
YES - Go to step 2.
NO - Replace the radiator fan relay.

2. Turn the ignition switch ON (II).
3. Measure the voltage between radiator fan relay 4P socket terminal No. 1 and body ground.





Is there battery voltage?
YES - Go to step 4.
NO - Replace the under-hood fuse/relay box.

4. Connect radiator fan relay 4P socket terminals No. 1 and No. 2 with a jumper wire.





Does the radiator fan run at high speed?
YES - Go to step 5.
NO - Repair an open in the wire between radiator fan relay 4P socket terminal No. 2 and radiator fan motor 2P connector terminal No. 2, or open between terminal No. 1 and body ground.

5. Measure voltage between radiator fan relay 4P socket terminal No. 3 and body ground with the ignition switch ON (II).





Is there battery voltage?
YES - Repair an open in the wire between radiator fan relay 4P socket terminal No. 4 and the powertrain control module (PCM).
NO - Repair an open in the wire between radiator fan relay 4P socket terminal No. 3 and the underdash fuse/relay box.