This Cummins M11 code 431 sheet documents the idle validation switch circuit fault (PID P091, SPN 91, FMI 3, SRT 00-611) for the IVS variant on the CELECT Plus engine. It is a 5-page yellow-lamp troubleshooting chart.
Official document details
| Brand | Cummins |
|---|---|
| Model coverage | M11 CELECT Plus (1995-98) |
| System / group | Idle Validation Switch Circuit |
| Fault code | 431 (IVS) |
| PID / SPN | P091 / SPN 91 |
| FMI | 3 |
| Diagnostic lamp | Yellow |
| SRT | 00-611 |
| Pages | 5 |
| File size | 0.3 MB |
| Format | |
| 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 M11 code 431 diagnosis
The idle validation switch (IVS) tells the ECM when the accelerator pedal is released (on-idle) or depressed (off-idle) and is factory-adjusted to change state at the correct pedal position; it sits on the accelerator pedal assembly. Shop talk attributes the fault to a loose connection, an uncalibrated pedal, or a mis-wired switch, and notes that breakout cable part number 3824892 is required to check voltage levels. If the wiring and sensor checks pass, the manual directs replacing the circuit wires between the pedal and ECM, routing them around the bulkhead, testing with the temporary wires, and re-sealing the bulkhead openings.
Applicable truck models
It applies to the Cummins M11 CELECT Plus (1995-98) with the IVS accelerator pedal assembly. Confirm the calibration procedure on the official Cummins website.
Who needs this M11 code 431 manual
Technicians resolving idle-validation faults, loose connections, or pedal-calibration issues on M11 CELECT Plus trucks with the IVS pedal 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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