This document is a Fault Code 1515 DTCs troubleshooting procedure covering the SAE J1939 Multiplexed Accelerator Pedal or Lever Sensor System diagnostic for ISB6.7 CM2250 engines (2010–2012). It provides circuit descriptions, fault conditions, step-by-step guided diagnostics, and ECM calibration verification procedures. The fault is triggered when the J1939 multiplexing controller detects a malfunction of the multiplexed accelerator pedal, causing the engine to idle only and illuminating the red STOP ENGINE lamp.
Official Fault Code 1515 DTCs document details
| Brand | Cummins |
| Model coverage | ISB6.7 CM2250, ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250 |
| System/Group | DTCs — SAE J1939 Multiplexed Accelerator Pedal or Lever Sensor System |
| Publication no. | — |
| Year/Revision | Last Modified 20-Jan-2011 |
| Pages | 7 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview — Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Fault Code 1515 — SPN 91, FMI 19 — SAE J1939 Multiplexed Accelerator Pedal or Lever Sensor System — Received Network Data In Error
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures — ECM Calibration Code (Procedure 019-032)
- Step 1 — Check the Fault Codes
- Step 2 — Check the OEM VECU and Engine ECM for Proper Multiplexing Configuration
- Step 3 — Check ECM Calibration and Clear Fault Codes
Applicable truck models
This procedure applies to Cummins ISB6.7 CM2250 engines and also references ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, QSB6.7 CM2250, QSL9 CM2250, and GX CM2250 engine platforms. The ECM calibration table lists bulletin numbers for ISF2.8 CM2220, ISF3.8 CM2220, ISB4.5/ISD4.5/ISD6.7 CM2150 SN, ISL8.9 CM2150 SN, and ISM11 CM876 SN models as well. These engines appear in medium-duty trucks, buses, and vocational vehicles from various OEMs. For official Cummins technical resources, visit Cummins official website.
Who needs this Fault Code 1515 DTCs manual
Diesel mechanics and workshop owners diagnosing a red STOP ENGINE lamp with an idle-only condition linked to J1939 multiplexed accelerator pedal faults on CM2250 engines will find this guide essential. It walks through INSITE™ electronic service tool connections, VECU-to-ECM multiplexing configuration verification (Procedure 019-362), and calibration update checks (Procedure 019-032).
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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