This Cummins ISB fault 1239 document is a 9-page PDF troubleshooting guide for Fault Code 1239 on ISB6.7 CM2350 engines. It explains the accelerator pedal or lever position sensor 2 circuit fault, including voltage-above-normal conditions, limp home effect, connector checks, harness tests, ECM response checks, and repair validation.
Official Cummins ISB fault 1239 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2350, 2013-17 |
| System/Group | DTCs; accelerator pedal or lever position sensor 2 circuit |
| Year/Revision | Unknown; copyright 2017 shown in file |
| Pages | 9 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Document table of contents
- Fault Code: 1239; SPN: 2623; FMI: 3; Lamp: Amber
- Accelerator Pedal or Lever Position Sensor 2 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
- Possible causes of this fault
- Troubleshooting Steps
- Step 1A) Check for sensor supply fault codes
- 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 from the 2013-17 coverage group where Fault Code 1239 is used for accelerator pedal or lever position sensor 2 signal voltage above normal or shorted to a high source. The extract identifies OEM harness wiring, OEM service manual references, ECM connector checks, diagnostic tool use, and calibration review, but it does not list specific truck makes or chassis models. See the manufacturer at Cummins official website.
Who needs this Cummins ISB fault 1239 manual
Workshop technicians, fleet mechanics, and diagnostic tool users need this Cummins ISB fault 1239 manual when an amber CHECK ENGINE lamp or MIL is linked to SPN 2623 FMI 3. It is useful for checking the accelerator pedal position sensor 5-volt supply, return circuit, signal circuit, OEM harness condition, connector pins, and ECM calibration status before replacing parts.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Cummins INSITE 9.3 – The Essential Diagnostic Tool for Cummins Engines
Cummins Calterm Version 5.16 – Advanced ECM Control and Precision Tuning for Cummins Engines
Cummins InCal CE – The Calibration and Configuration Tool for Cummins Engines
