Diagnostic Trouble Code (DTC) Information ECM-842D
Condition
Engine Control Module (ECM) checks the starter motor relay. If Engine Control Module (ECM) registers that the starter motor relay's signal cable has a voltage that is lower than a certain limit value for a certain time, this is interpreted as a malfunction and the diagnostic trouble code (DTC) is generated.
The diagnostic trouble code (DTC) can be diagnosed when starting the engine.
Substitute Value
- Only manual start possible.
Possible Source
- Short-circuit to ground in the signal cable.
- Open-circuit in the signal cable.
- Damaged starter motor relay.
- Open-circuit in the voltage supply to the starter motor.
- Damaged control module.
Fault symptom[s]
Engine fails to start