CHECK HARNESS BETWEEN ENGINE COOLANT TEMPERATURE SENSOR AND ECM CONNECTOR.

Measure the voltage between engine coolant temperature sensor connector and engine ground.

Connector & terminal

(E8) No. 2 (+) — Engine ground (−):

QUESTION

Is the voltage 4 V or more?

Yes No

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit of harness between ECM and engine coolant temperature sensor connector

• Poor contact of engine coolant temperature sensor connector

• Poor contact in ECM connector

• Poor contact of coupling connector

• Poor contact of joint connector