Electronic Control System Signature, ISX and QSX15 Engines – FAULT CODE 349 (INDUSTRIAL)

Auxiliary Speed Governor


Overview

CODE REASON EFFECT
Fault Code: 349
PID: P191
FMI: 0/16
LAMP: Yellow
SRT: 

A frequency greater than calibrated threshold was detected at the tailshaft governor signal pin of the 31-pin connector.

Calibration-dependent power and speed derate.

Auxiliary Speed Governor Circuit
SMALL | MEDIUM | LARGE

Circuit Description

The auxiliary speed governor provides a means to govern the engine independent of engine speed. This circuit controls output shafts or other devices downstream of a torque convertor.

The auxiliary speed governor provides a means to control the output shafts or other devices downstream of a torque convertor, independent of engine speed.

Component Location

The auxiliary speed governor location varies with the OEM. Use the OEM troubleshooting and repair manual.

Shop Talk

This fault can only be caused by a high-frequency input into the auxiliary speed governor circuit.

Refer to Troubleshooting Fault Code t05-349.

Last Modified:  26-Oct-2010