DTC ECM-2000

Condition







Diagnostic trouble code (DTC) ECM-2000 is stored if the control module registers that there is a short-circuit to ground/voltage in the sensor circuit or if there is an open-circuit in the circuit.

Substitute value
- if the temperature sensor in the mass air flow (MAF) sensor is OK, its value is used as the start temperature. Otherwise the value is set at +20 degrees C
- after starting, the engine coolant temperature (ECT) is calculated theoretically
- engine cooling fan (FC) at low-speed.

Possible source

Signal too high
- short-circuit to supply voltage in the signal cable
- open-circuit in the signal cable
- defective engine coolant temperature (ECT) sensor.

Signal too low
- short-circuit to ground in the signal cable
- defective engine coolant temperature (ECT) sensor.

Fault symptom[s]
- difficult to start when the engine is warm
- driveability problems when warm starting
- the engine cooling fan (FC) operates constantly.