Cummins Fault Code 6575

07/12/2025

Overview

CODE

REASON

EFFECT

Fault Code: 6575
PID:
SPN: 7317
FMI: 9/9
LAMP: None
SRT:

Loss of communication with predictive cruise control.

Predictive cruise control will not operate. Standard cruise control may not operate.

Cummins Fault Code 6575 — SAE J1939 Datalink Circuit

Circuit Description

The predictive cruise control system sends commands to the ECM via the vehicle J1939 network. Predictive Cruise Control dynamically adjust the vehicle speed profile while the vehicle is operating in cruise control. The vehicle speed profile is optimized for fuel economy based on the upcoming road grade.

Component Location

The SAE J1939 data link wiring and the SAE J1939 devices vary by OEM options.

Conditions for Running the Diagnostics

This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.

Conditions for Setting the Fault Codes

The Engine Control Module (ECM) did not receive a message from a multiplexed device.

Action Taken When the Fault Code is Active

The ECM logs the fault code immediately when the diagnostic runs and fails.

The predictive cruise control will not operate.

Conditions for Clearing the Fault Code

To validate the repair, perform a key cycle, start the engine and let it idle for 2 minute.
The fault code status displayed by the recommended Cummins electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
The “Reset All Faults” command in the recommended Cummins electronic service tool or equivalent can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.