Temperature Gauge: Testing and Inspection

Gauge Testing
1. Check the No. 20 (20 A) fuse in the under-dash fuse/relay box before testing.
2. Remove the engine cover.





3. Make sure the ignition switch is OFF, then disconnect the YEL/GRN wire from the ECT sending unit, and ground it with a jumper wire.
4. Turn the ignition switch ON (II). Check that the pointer of the ECT gauge starts moving toward the "H" mark.

CAUTION: Turn the ignition switch OFF before the pointer reaches THE on the gauge dial. Failure to do so may damage the gauge.

- If the pointer of the gauge does not move at all, check for an open in the YEL/GRN wire.
If the wires are OK, replace the ECT gauge.
- If the ECT gauge works, test the ECT sending unit.