Cummins ISB6.7 CM2350 (2013-17) Fault Code: 5177 PID: SPN: FMI: 9 Variable Geometry Turbocharger Actuator Software – Abnormal Update Rate. The ECM lost communication or did not support message from the VGT actuator.

Cummins ISB6.7 CM2350 (2013-17) Fault Code: 5177 PID: SPN: FMI: 9 Variable Geometry Turbocharger Actuator Software – Abnormal Update Rate. The ECM lost communication or did not support message from the VGT actuator.

Circuit Description
The variable geometry turbocharger (VGT) is electronically activated by the VGT actuator. The VGT actuator is a smart device and receives information via the J1939 data link from the primary engine control module (ECM). The VGT actuator performs its own diagnostics and reports malfunctions back to the primary engine ECM, using the J1939 data link. The ECM then decodes the error message and converts it to a fault code.

Component Location
The VGT actuator is located on the turbocharger bearing housing.

Conditions for Running the Diagnostics
This diagnostic runs continuously when the keyswitch is in the ON position.

Conditions for Setting the Fault Codes
The Engine Control Module (ECM) did not receive a valid J1939 data link message from the Variable Geometry Turbocharger (VGT) actuator for more than 1 second.

Action Taken When the Fault Code is Active
The ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.

Conditions for Clearing the Fault Code
1)To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
2)The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
3)The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
4)The Reset All Faults command in INSITE? electronic service tool can be used to clear active and inactive faults.

Shop Talk
This fault code indicates that the ECM did not recieve the turbocharger actuator identification message from the VGT actuator.