The Cummins M11 131-ISS sheet documents the accelerator position sensor circuit (PID P091, SPN 91, FMI 3) on Cummins CELECT engines built from 1990 to 1994. This 7-page reference drives a technician through the circuit description, accelerator position sensor location, and the pin-by-pin checks needed to turn the red lamp off.
Cummins M11 131-ISS: Official document details
| Brand | Cummins |
| Model coverage | M11 and N14 CELECT (1990-94) |
| System / Group | Accelerator position sensor circuit (ISS) |
| Fault code identifier | Code 131 · PID P091 · SPN 91 · FMI 3 · SRT 00-084 |
| Warning lamp | Red |
| Pages | 7 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Document table of contents
- Circuit description and three-wire layout
- Component location
- Shop talk and pedal calibration
- OEM harness continuity checks
- Resistance and short-circuit checks
- Troubleshooting Steps 1A to 4B
- Clearing inactive fault codes
Applicable truck models
This procedure applies to Cummins M11 CELECT engines built from 1990 to 1994 and shares the accelerator position sensor logic used on N14 CELECT engines of the same era. It is a fault-code troubleshooting sheet from the CELECT diagnostic set (SRT 00-084), not a full engine manual, so confirm exact wiring and part numbers against factory data on the official Cummins website before replacing any component.
Cummins M11 131-ISS diagnostic steps
Inspect the OEM harness at the accelerator position sensor, then check continuity from ECM pins 11, 18, and 19 to the sensor (less than 10 ohms). Measure supply-to-return resistance (2000 to 3000 ohms) and supply-to-signal resistance (released 1500 to 3000 ohms, depressed 200 to 1500 ohms) with repair connector Part Number 3823255. Confirm short-circuit isolation above 100k ohms, use jumper Part Number 3822917 between pins 11 and 19 to verify ECM response, then recalibrate the pedal three times with the key on.
Who needs this Cummins M11 131-ISS manual
Technicians use this idle-validation variant to diagnose an FMI 3 accelerator signal fault, confirming whether the pedal, its OEM harness, or the ECM is at fault before any part is replaced.
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 (1990-94)
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