CHECK HARNESS BETWEEN ECM AND ENGINE COOLANT TEMPERATURE SENSOR CONNECTOR.

1) Connect all connectors.

2) Turn the ignition switch to ON.

3) Measure the voltage between ECM and chassis ground.

Connector & terminal

(B134) No. 34 (+) — Chassis ground (−):

QUESTION

Is the voltage 5 V or more?

Yes No

Repair the short circuit to power in the harness between the ECM and engine coolant temperature sensor connector.

Replace the engine coolant temperature sensor.