CM850 Electronic Control System – FAULT CODE 2345 (ISB/QSB Automotive or Industrial Application)

Turbocharger Speed – Invalid Rate of Change Detected


Fault Code: 2345
PID: P103
SPN: 103
FMI: 10/10
LAMP: Amber

Turbocharger speed – invalid rate of change detected. The turbocharger speed sensor has detected an erroneous speed value.

Possible-low-power estimated turbocharger speed will be used.

Turbocharger Speed Sensor Circuit

Circuit Description

The electronic control module (ECM) provides +5 VDC to the turbocharger speed sensor signal pin. Circuitry inside the turbocharger speed sensor detects the movement of the turbocharger compressor blades and produces a speed signal. This signal is used by the ECM for engine controls.

Component Location

The turbocharger speed sensor is located in the turbocharger compressor housing. Refer to Procedure 100-002 for a detailed component location view.

Shop Talk

This fault becomes active if the engine is running and the turbocharger speed signal rapidly changes faster than the capabilities of the turbocharger. This could be caused by a bent or missing compressor blade or a damaged compressor wheel.

Refer to Troubleshooting Fault Code t05-2345

Last Modified:  08-Jul-2010