Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-531D

Condition
The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) detects that the checksum calculated by the engine control module (ECM) does not correspond to the checksum stored in the central electronic module (CEM).
The diagnostic trouble code (DTC) is diagnosed when the ignition is on.

Substitute value
- None.

Possible source
- One or more diagnostic trouble codes (DTCs) are stored in the central electronic module (CEM).

Fault symptom[s]
- None.