Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-7100

Condition
The engine control module (ECM) contains a code for the immobilizer which is unique to each car. Before the engine can be started, the immobilizer code is checked to ensure that it corresponds to both the central electronic module (CEM) and the engine control module (ECM). The diagnostic trouble code (DTC) is stored if the immobilizer code does not correspond.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute value
None.

Possible source
- The engine control module (ECM) has an incorrect code for the immobilizer
- The central electronic module (CEM) has an incorrect code for the immobilizer
- Damaged engine control module (ECM).

Fault symptom[s]
- The starter motor turns but the engine does not start.