Cummins accelerator position sensor — Fault Code 432 ISS (P091,

This Cummins accelerator position sensor guide covers Fault Code 432 (PID P091, SPN 91, FMI 13, SRT 00-612) for the ISS variant on the M11 CELECT Plus. It is a 7-page red-lamp document dealing with the pedal signal to the ECM.

Official document details

Brand Cummins
Model coverage M11 CELECT Plus (1995-98)
System / group Accelerator Pedal Circuit
Fault code 432 (ISS)
PID / SPN P091 / SPN 91
FMI 13
Diagnostic lamp Red
SRT 00-612
Pages 7
File size 0.3 MB
Format PDF
Language English
Source Cummins fault code reference (TruckFaultCodes.com, 2017)

Document table of contents

  • Circuit description
  • Component location
  • Shop talk diagnostic notes
  • Step-by-step troubleshooting
  • Fault verification and clearing codes

Cummins accelerator position sensor checks

The accelerator pedal assembly relays the accelerator percentage the ECM needs, and the sensor is mounted on the pedal itself. Shop talk directs the technician to confirm the idle validation switch is properly calibrated, to make sure no external circuits are tapped into the sensor circuit, and to look for tampering. If wiring and sensor checks pass, the manual calls for replacing the circuit wires between pedal and ECM, routing them around the bulkhead without using the bulkhead connector, testing with the temporary wires in place, and re-sealing the openings to keep toxic and noxious fumes out of the cab.

Applicable truck models

The sheet applies to the Cummins M11 CELECT Plus (1995-98) with the ISS accelerator pedal assembly. Confirm the calibration procedure on the official Cummins website.

Who needs this accelerator position sensor manual

Technicians diagnosing red-lamp throttle or pedal-signal faults on M11 CELECT Plus trucks with the ISS pedal, including tampering, use this chart.

The full PDF is available in the DiagTechPro manuals library; a free account is required to download.

Applies to these truck models

This is the manufacturer document shared across 2 model families. It applies to:

  • Cummins DTCs
  • Cummins M11 CELECT Plus (1995-98)
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