Cummins ISL CM850 (2003-06) Fault Code: 288 PID: 29 SPN: 974 FMI: 19 SAE J1939 Multiplexing Remote Accelerator Pedal or Lever Data Error – Received Network Data Error. The OEM vehicle electronic control unit (VECU) detected a fault with the remote accelerator.

Cummins ISL CM850 (2003-06) Fault Code: 288 PID: 29 SPN: 974 FMI: 19 SAE J1939 Multiplexing Remote Accelerator Pedal or Lever Data Error – Received Network Data Error. The OEM vehicle electronic control unit (VECU) detected a fault with the remote accelerator.

This fault can occur when the OEM VECU detects an error on the remote throttle and or remote throttle enable switch. The ECM has been set up properly (components enabled and OEM VECU source addressed correctly) to receive multiplexed information for the remote throttle enable switch states and remote accelerator position over the J1939 datalink from an OEM VECU, and the OEM VECU is transmitting the message for that component. Most OEM’s will not have the circuitry to detect a remote throttle switch error.

The two types of errors that can occur for this fault are:

1)The OEM VECU determines that the remote throttle signal line is shorted high or shorted low. This fault status is transmitted to the Cummins ECM on the J1939 datalink, which causes this fault to occur in the Cummins ECM.
2)When the remote throttle enable switch has a shorted high or shorted low error detected by the OEM VECU. This fault status is transmitted to the ECM on the J1939 datalink, which causes this fault to occur in the ECM. Most OEM’s will not incorporate fault detection on a switch.

NOTE: It is still possible to get a Fault Code 285 or 286 if there is an incorrect setup in the OEM VECU or Cummins ECM for other components, or the remote throttle and remote throttle switch, or the datalink is damaged. OEM configurations must multiplex the remote throttle and remote throttle switch inputs together to allow the use of the J1939 multiplexing feature for these components. INSITE? can be used to monitor multiplexed components.

Possible repairs:

1)Enable the proper components for multiplexing on the applicable OEM application and ensure the OEM VECU source addresses for each component are correct.
2)There is an OEM issue with the remote throttle switch, the remote throttle, or with the OEM VECU.