This Cummins ISB6.7 131 document is a diagnostic troubleshooting PDF for Fault Code 131 on ISB6.7 CM2350 engines. It explains the accelerator pedal or lever position sensor 1 circuit, the voltage-above-normal condition, fault effects, diagnostic conditions, connector checks, harness tests, ECM calibration review, and fault clearing steps.
Official Cummins ISB6.7 131 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2350 (2013-17) |
| System/Group | DTCs; accelerator pedal or lever position sensor 1 circuit |
| Year/Revision | Unknown; copyright 2017 shown in the file |
| Pages | 10 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Document table of contents
- FAULT CODE: 131
- PID: P091
- SPN: 91
- FMI: 3/3
- LAMP: RED
- ACCELERATOR PEDAL OR LEVER POSITION SENSOR 1 CIRCUIT – VOLTAGE ABOVE NORMAL OR SHORTED TO HIGH SOURCE
- CIRCUIT DESCRIPTION
- COMPONENT LOCATION
- REASON
- EFFECT
- CONDITIONS FOR RUNNING THE DIAGNOSTICS
- CONDITIONS FOR SETTING THE FAULT CODES
- ACTION TAKEN WHEN THE FAULT CODE IS ACTIVE
- CONDITIONS FOR CLEARING THE FAULT CODE
- SHOP TALK
- TROUBLESHOOTING STEPS
- Step 1A) Check for sensor supply fault codes.
- Step 1B) Check for an active fault code.
- Step 2A) Inspect the accelerator pedal or lever position sensor and connector pins.
- Step 2B) Check the accelerator pedal position sensor supply voltage and return circuit.
- Step 2C) Check the circuit response.
- Step 2D) Check the fault codes and verify accelerator pedal condition.
- Step 3A) Inspect the ECM and OEM harness connector pins.
- Step 3B) Check for an open circuit in the OEM harness.
- Step 3C) Check for a pin-to-pin short circuit in the OEM harness.
- Step 3D) Check for an inactive fault code.
- Step 4A) Check if an ECM calibration update is available.
- Step 4B) Disable the fault code.
Applicable truck models
This file applies to Cummins ISB6.7 CM2350 engines listed for 2013-17 in the DTCs group. The document directs users to the OEM service manual and OEM wiring diagram for vehicle-specific accelerator pedal assembly location, connector pin identification, and harness routing. It covers ECM diagnostics for accelerator pedal position sensor 1, including a high signal voltage condition greater than 4.467-VDC for more than 1 second, RED STOP ENGINE lamp behavior, MIL behavior for OBD engines, and limp home operation. For official product and service information, visit Cummins official website.
Who needs this Cummins ISB6.7 131 manual
Mechanics, fleet technicians, and workshop owners need this Cummins ISB6.7 131 manual when diagnosing Fault Code 131, SPN 91, FMI 3/3, especially when checking the 5 volt supply, return circuit, signal circuit, accelerator pedal connector, OEM harness, and ECM connector. It is useful for intermittent accelerator complaints because the procedure describes monitoring signal voltage with a diagnostic tool while flexing the harness to find abrupt voltage changes.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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