Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-273D

Condition




The engine control module (ECM) checks the signal for engine coolant temperature (ECT).
A diagnostic trouble code (DTC) is stored if the engine control module (ECM) receives a signal from the engine coolant temperature (ECT) sensor corresponding to a temperature that is lower than a certain value.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute value
- Initial boost pressure
- The engine coolant temperature (ECT) is calculated based on a model. Three-way catalytic converter (TWC) heating and fuel trim at start (starting trim), idle diagnostic and misfire diagnostic are disabled
- The engine cooling fan (FC) runs at a predefined speed.

Possible source
- Contact resistance and oxidation in the terminals
- Open-circuit in the signal cable
- Open-circuit in the signal ground cable
- Short-circuit to supply voltage in the signal cable
- Damaged temperature sensor.

Fault symptom[s]
- Malfunction indicator lamp (MIL) lit
- The engine is difficult to start.