Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




The engine coolant temperature (ECT) signal from the engine control module (ECM) is a pulsed signal between 0 V and 5 V with a variable frequency and fixed pulse ratio (% duty). The frequency (f) increases with decreasing temperature.
Diagnostic trouble code (DTC) CI-10 is stored in the combined instrument panel if the engine coolant temperature (ECT) signal from the engine control module (ECM) has had a time constant that is less than 2 ms for more than 2 seconds.

Substitute value
None.

Possible source
- defective combined instrument panel
- defective engine control module (ECM).

Fault symptom[s]
- the engine coolant temperature (ECT) gauge does not function (does not apply to Bi-fuel cars)
- the high engine coolant temperature (ECT) warning lamp flashes.
The lamp flashes for 10 seconds if a fault is detected (Bi-fuel cars only).