PACCAR PX-9 CM2350 (2013-17) Fault Code:3525 PID: SPN:84 FMI:2 Wheel-Based Vehicle Speed – Received Network Data in Error
Reason:
Wheel-Based Vehicle Speed – Received Network Data In Error. The J1939 multiplexing controller has indicated a malfunction of the wheel-based vehicle speed sensor
Effect:
None on performance
Circuit Description:
Normally, switches, accelerators, and other components are connected to the engine control module (ECM) directly through individual wires. Multiplexing allows those same components to be hard wired to an original equipment manufacturer (OEM) vehicle electronic control unit (VECU) or transmission electronic control unit (ECU) in the cab. Then component values and states from components such as sensors, accelerators, and switches can be transmitted from the OEM VECU to the Cummins® ECM over the SAE J1939 data link.
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 OEM VECU determined that there was a malfunction of the wheel-based vehicle speed sensor.
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 and/or MIL 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:
The J1939 multiplexing controller has indicated a malfunction of the wheel-based vehicle speed sensor.
Possible Causes:
1) Inactive fault codes
2) Faulty ECM
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