Temperature Gauge: Testing and Inspection

Inspection

Engine Coolant Temperature Gauge (Hi Model)
1. Disconnect the wiring connector (A) from the engine coolant temperature sender in the engine compartment.
2. Turn the ignition switch ON. Check that the gauge needle indicates cool. Turn the ignition switch OFF.
3. Connect a 12V, 3.4 wattages test bulb between the harness side connector and ground.
4. Turn the ignition switch ON.
5. Verify that the test bulb flashes and that the indicator moves to HOT position.
If operation is not as specified, replace the cluster. Then recheck the system.






Engine Coolant Temperature Gauge (Low Model)
1. Turn the ignition switch ON.
2. Check that the high temperature lamp (Red) is ON for 3 seconds and then the low temperature lamp (Blue) is ON.
3. If operation is not as specified, replace the cluster. Then recheck the system.

Engine Coolant Temperature Sender
1. Using an ohmmeter, measure the resistance between the terminal 2 and ground.




2. If the resistance value is not as shown in the table, replace the temperature sender.





A. Temp high/Low indicator's on & off condition




When IGN(+) ON, temp high on for 3 seconds when temp high/low is on/off according to engine coolant temperature sender.