Temperature Gauge: Testing and Inspection

ENGINE COOLANT TEMPERATURE GAUGE INSPECTION

1. INSPECT RECEIVER GAUGE OPERATION





(a) Disconnect the connector from the sender gauge.
(b) Turn the ignition switch ON, check that the receiver gauge needle indicates COOL.





(c) Ground terminal on the wire harness side connector through a 3.4 W test bulb.
(d) Turn the ignition switch ON, check that the bulb lights up and the receiver gauge needle moves toward the hot side.
If operation is as specified, replace the sender gauge. Then recheck the system.
If operation is not as specified, measure the receiver gauge resistance.





2. INSPECT RECEIVER GAUGE RESISTANCE
(a) Remove the 3 screws.





(b) Measure the resistance between terminals.

HINT: Connect the test leads so the current from the ohmmeter can flow according to the chart order.

If resistance value is not as specified, replace the engine coolant temperature receiver gauge.