Corolla LE Sedan L4-1762cc 1.8L DOHC MFI (1998)
Temperature Gauge: Testing and Inspection
INSPECT ENGINE COOLANT TEMPERATURE RECEIVER GAUGE OPERATION
a. Disconnect the connector from the sender gauge.
b. Turn the ignition switch ON and 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, and check that the bulb lights up and the receiver gauge needle moves to 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.
INSPECT ENGINE COOLANT TEMPERATURE RECEIVER GAUGE RESISTANCE
w/ Tachometer:
Measure the resistance between terminals.
If resistance value is not as specified, replace the receiver gauge.
HINT: Connect the test leads so that the current from the ohmmeter can flow according to the above order. This circuit includes the diode.
If resistance value is not as specified, replace the receiver gauge.
