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-11 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 greater than 65 ms for more than 2 seconds.
Substitute Value
None.
Possible Source
- short-circuit to ground in the signal cable
- short-circuit to supply voltage in the signal cable
- open-circuit in the signal cable
- 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).