CM850 Electronic Control System – FAULT CODE 343

Engine Control Module Warning Internal Hardware Failure – Bad Intelligent Device or Component


Overview

CODE REASON EFFECT
Fault Code: 343
PID: S254
SPN: 629
FMI: 12/12
LAMP: Amber
SRT: 

Engine Control Module Warning Internal Hardware Failure – Bad Intelligent Device or Component.

No performance effects or possible severe power derate.

Electronic Control Module
SMALL | MEDIUM | LARGE

Circuit Description

The ECM is a computer that is responsible for engine control, diagnostics, and user features.

Component Location

The ECM is located on the fuel system side of the engine. Refer to Procedure 100-002 for a detailed component location view.

Shop Talk

This fault code can only be caused by an internal ECM problem. Repairs are not possible for the ECM.

For Euro certified engines this fault code indicates that the Real Time Clock feature needs to re reset (if equipped).

Refer to Troubleshooting Fault Code t05-343

Last Modified:  08-Jul-2010