Engine Coolant Temperature Light Does Not Work

With the ignition key on, the engine coolant temperature warning light on the instrument panel does not work.

NOTE:

The message comes from the engine coolant temperature sensor signal to the Powertrain Control Module (PCM) on the CAN-C network and made available to the Instrument Panel Cluster (IPC) through the Body Control Module (BCM) via the CAN-B network.

1	CHECK WITH DIAGNOSTIC TOOL	Result OK	Result Not OK	Action
	Connect a diagnostic scan tool. Verify the absence of anomalies on the PCM.	Continue to Step 2	Presence of errors	Proceed as indicated by the diagnostic tool
2	CHECK WITH DIAGNOSTIC TOOL	Result OK	Result Not OK	Action
	With the diagnostic scan tool still connected to the DLC, test the functionality of the light in the IPC through active diagnosis	Continue to Step 3	The lamp does not flash.	Replace instrument panel cluster
3	CHECK ELECTRICAL CIRCUIT	Result OK	Result Not OK	Action
	Check continuity / insulation of the wiring between the engine coolant temperature sensor and the PCM.	Continue to Step 4	Circuit fault / not insulated	Restore circuit continuity / insulation
4	CHECK ENGINE TEMPERATURE SENSOR	Result OK	Result Not OK	Action
	Check the correct operation of the engine coolant temperature sensor	Diagnostic complete	Faulty sensor	Replace the engine coolant temperature sensor