Test K: The Engine Over Temperature Warning Indicator Is Never/Always On

PINPOINT TEST K: THE ENGINE OVER TEMPERATURE WARNING INDICATOR IS NEVER/ALWAYS ON

Normal Operation
The engine over temperature warning indicator informs the driver that the engine coolant is overheating due to loss of engine coolant fluid or other cause, and that the PCM is in failsafe cooling mode. There are two levels of failsafe cooling mode. The 1st mode is when the PCM provides engine operation but takes on the limp home strategy. The 2nd mode is when the PCM determines that the engine is sufficiently over temperature and is about to be shut down by the PCM. In both modes, the PCM provides the engine over temperature information to the instrument cluster (IC) to illuminate the engine over temperature warning indicator.

This pinpoint test is intended to diagnose the following:
- PCM
- Instrument cluster (IC)

K1-K2:

K3-K4: