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Electronic Control System Signature, ISX and QSX15 Engines – FAULT CODE 111

Electronic Control Module (ECM) Microprocessor


Overview

CODE REASON EFFECT
Fault Code: 111
PID: S254
SPN: 629
FMI: 12/12
LAMP: Red
SRT: 

Error internal to the ECM related to the memory hardware failures or internal ECM voltage supply circuits.

Engine will not start.
ECM Microprocessor
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 bolted to the intake side of the engine between the air horn and the front of the engine.

Shop Talk

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

Refer to Troubleshooting Fault Code t05-111.

Last Modified:  26-Oct-2010
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