The pedal message is used to calculate fuel injection.
The J1587 and J1939 serial data lines are used as the standard communication link for on-board vehicle instrumentation, off-board service diagnostics and fleet management.
The (VECU) Vehicle Electronic Control Unit is linked to the Engine Control Module (ECM) via these data lines.
Conditions for diagnostic trouble code (DTC):
1) Signal unavailable or not regularly updated
Probable cause
1) Accelerator pedal
2) Vehicle Control Unit (VECU)
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