On Vehicle Inspection
NOTE:
Low coolant temperature is below 181°F (83°C). High coolant temperature is above 199°F (93°C).
- Turn ignition switch on. Check that the fan does not rotate. If it does, check the fan relay and temperature switch, and check for a separated connector or severed wire between the relay and temperature switch. See Fig 1.
- Disconnect temperature switch connector. See Fig 2. Check that the fan rotates. If it does not, check the fan relay, fan motor, ignition relay and fuse, and check for a short circuit between the fan relay and temperature switch.
- Connect temperature switch connector.
- Start engine. Raise engine coolant temperature to above 199°F (93°C). Check that the fan rotates. If it does not, replace the temperature switch.