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CM870 and ISX Engines – FAULT CODE 2356

Turbocharger Control Shutoff Valve Circuit


Overview

CODE REASON EFFECT
Fault Code: 2356
PID: 
SPN: 2792
FMI: 4/4
LAMP: Amber
SRT: 

Turbocharger Control Shutoff Valve – shorted high. Low voltage detected at turbocharger control shutoff valve circuit.

Turbocharger control shutoff valve will remain closed. No air delivered to turbocharger control valve.
Turbocharger Control Shutoff Valve Circuit
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Circuit Description

The turbocharger control shutoff valve controls the flow of vehicle brake air to the turbocharger control valve. When the keyswitch is in the ON position, the ECM commands the shutoff valve open, allowing vehicle air to pass through to the turbocharger control valve. When the keyswitch is in the OFF position, the ECM commands the shutoff valve closed, shutting off the flow of vehicle air to the turbocharger control valve. This also prevents vehicle brake air from bleeding down through the turbocharger control valve while the vehicle is not in use.

Component Location

The turbocharger control shutoff valve is located on the intake side of the engine, below the air compressor. Refer to Section E for a detailed component location view.

Shop Talk

Possible causes for this fault include:

  • Short circuit to ground in the engine harness, connectors, or control valve.

Refer to Troubleshooting Fault Code t05-2356

Last Modified:  01-Sep-2010

Published by Jack