Electronic Control System Signature, ISX and QSX15 Engines – FAULT CODE 784

Adaptive Cruise Control Circuit


Overview

CODE REASON EFFECT
Fault Code: 784
PID: 
SPN: 1590
FMI: 2
LAMP: Amber
SRT: 

Adaptive Cruise Control Circuit

Loss of communication with adaptive cruise control.

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

Adaptive Cruise Control Circuit
SMALL | MEDIUM | LARGE

Circuit Description

The adaptive cruise control unit communicates with the electronic control module (ECM) sending and receiving vehicle speed control messages through the SAE J1939 data link.

Component Location

The location of the adaptive cruise control unit will vary by OEM. Use the OEM service manual for specific location.

Shop Talk

This fault is set active if the ECM does not receive the Heartbeat message from the adaptive cruise control unit on the SAE J1939 data link.

Refer to Troubleshooting Fault Code t05-784.

Last Modified:  26-Oct-2010