This Cummins 2186 fault code document is a troubleshooting manual for Sensor Supply 4 Circuit voltage below normal or shorted to low source. It explains the 5 VDC accelerator pedal position sensor supply circuit, the idle-only engine effect, INSITE fault validation, harness checks, and ECM calibration review.
Official Cummins 2186 fault code document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; also lists ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, QSB6.7 CM2250, QSL9 CM2250, and other CM2150/CM2220 applications in the associated procedures table |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Accelerator Pedal Position Sensor Supply Voltage Circuit |
| Publication no. | Associated bulletin number for ISB6.7 CM2250: 4022254 |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting procedure Last Modified: 28-Dec-2010 |
| Pages | 11 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- 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
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Check the sensors and circuits connected to the sensor supply and return.
- Guided Step 3 – Check the ECM and OEM harness.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
The file applies to Cummins engines using this Sensor Supply 4 diagnostic, with the page header naming ISX11.9 CM2250, ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, and ISX15 CM2250 for the Accelerator Pedal Position Sensor Supply Voltage Circuit. The associated procedures table also lists ECM Calibration Code Procedure 019-032 entries for ISB6.7 CM2250 bulletin 4022254, ISC8.3 and ISL9 CM2250 bulletin 4022257, ISX15 CM2250 bulletin 4022250, ISX11.9 CM2250 bulletin 2883445, QSL9 CM2250 bulletin 4022256, and QSB6.7 CM2250 bulletin 4022255. The accelerator pedal is located in the cab, and the document directs technicians to the OEM service manual for component location and wiring identification. Manufacturer reference: Cummins official website.
Who needs this Cummins 2186 fault code manual
Workshop diagnosticians and fleet mechanics need this 2186 fault code manual when an engine only idles and INSITE shows SPN 3512 FMI 4/4 for low voltage on the 5 VDC sensor supply to the accelerator pedal position sensor. It is most useful for checking connector pins, sensor response, pin-to-pin shorts, pin-to-ground shorts, ECM calibration revision, and fault clearing conditions.
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