Engine coolant temperature (ect) gauge

A

B

Fuel tank access panel

3 – P connector

• If the indicator light did not come on in step 3, remove the fuel tank access panel and disconnect the 3 – P connector from the fuel gauge sending unit. Connect the GRN/RED terminal to the BLK terminal with a jumper wire.
  • If the light comes on, the problem is the sending unit.
  • If the light does not come on, the problem is an open in the GRN/RED wire to the gauge assembly, no power to the gauge, a blown bulb, or poor earth.

ENGINE COOLANT TEMPERATURE (ECT) GAUGE

Gauge Test

Note: Refer to the engine coolant temperature (ECT) gauge circuit diagram.

1. Check the No. 8 (10 A) fuse in the passenger compartment fuse/relay box and YEL wire between the passenger compartment fuse/relay box and the gauge before testing.

A

B

RED wire

2. Make sure the ignition switch is OFF, then disconnect the RED wire from the engine coolant temperature (ECT) sending unit and earth it with a jumper wire.
3. Turn the ignition switch ON. (II) Check that the pointer of the ECT gauge starts moving toward the red zone.

CAUTION: Turn the ignition switch OFF (0) before the pointer reaches the red zone on the gauge dial. Failure to do so may damage the gauge.

• If the pointer of the gauge does not swing at all, check for an open in the RED wire. If the wire is OK, check the ECT gauge.
• If the gauge is OK, check the ECT sending unit.