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Engine Control Module Warning Internal Hardware Failure - Bad Intelligent Device or C... Page 1 of 3


FAULT CODE 343

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

Overview


CODE

REASON

EFFECT

Fault Code: 343

Engine Control Module Warning Internal Hardware Failure - Bad Intelligent Device

Possible none on performance, or

PID:

or Component. Internal ECM error.

severe derate.

SPN: 629



FMI: 12/12



LAMP: Amber



SRT:




Engine Control Module Warning Internal Hardware Failure - Bad Intelligent Device or C... Page 3 of 3


Circuit Description


The engine control module (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. Use the following procedure for a detailed component location view. Refer to Procedure 100-002 in Section E.


Shop Talk


  • This is a fault that can only be caused by an internal ECM problem. Repairs are not possible for the ECM. Refer to Troubleshooting Fault Code t05-343.

Last Modified: 15-Jan-2013

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