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PACCAR PX-8 CM2150 (2007-09) Fault Code: 287 PID: 91 SPN: 91 FMI: 2 E J1939 Multiplexed Accelerator Pedal or Lever Sensor System – Received Network Data In Error. The OEM vehicle electronic control unit (VECU) detected a fault with its accelerator pedal.
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.
This fault can occur when the OEM VECU detects an error on the accelerator. The ECM has been set up properly (components enabled and OEM VECU source addressed correctly) to receive multiplexed information for the idle validation switch states and accelerator position over the J1939 datalink from an OEM VECU, and the OEM VECU is transmitting the message for that component.
The three types of errors that can occur for this fault are:
1)When the accelerator is depressed and the OEM VECU reads accelerator position as greater than 0 percent but the idle validation switch indicates it is in the idle position, this fault status is transmitted to the Cummins® engine ECM on the J1939 datalink, which causes this fault to occur in the Cummins® engine ECM.
2)When the accelerator is released and the OEM VECU reads accelerator position as 0 percent, but the idle validation switch indicates it is not in the idle position. This fault status is transmitted to the Cummins® engine ECM on the J1939 datalink, which causes this fault to occur in the Cummins® engine ECM.
3)The OEM VECU determines that the accelerator signal line is shorted high or shorted low.
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® engine ECM, for other components, or if the accelerator and idle validation switch, or if the datalink is damaged. The OEM configurations must multiplex the accelerator and idle validation switch inputs together to allow the use of the J1939 multiplexing and limp home feature for these components. INSITE™ electronic service tool can be used to monitor multiplexed components.
Possible repairs:
1)Replace the OEM harness.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 286 PID: SID 231 SPN: 639 FMI: 13 SAE J1939 Multiplexing Configuration Error – Out of Calibration. The ECM expected information from a multiplexed device but only received a portion of the necessary information.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 285 PID: SID 231 SPN: 639 FMI: 9 SAE J1939 Multiplexing PGN Timeout Error – Abnormal Update Rate. The ECM expected information from a multiplexed device but did not receive it soon enough or did not receive it at all.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 281 PID: SID 126 SPN: 1347 FMI: 7 Fuel Pump Pressurizing Assembly 1 – Mechanical System Not Responding Properly or Out of Adjustment
PACCAR PX-8 CM2150 (2007-09) Fault Code: 272 PID: SID 126 SPN: 1347 FMI: 3 Fuel Pump Pressurizing Assembly 1 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage or open circuit detected at the fuel pump actuator circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 271 PID: SID 126 SPN: 1347 FMI: 4 Fuel Pump Pressurizing Assembly 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the fuel pump actuator circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 256 PID: 171 SPN: 171 FMI: 4 Ambient Air Temperature Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the ambient air temperature circuit.