This Cummins 1142 troubleshooting manual is a 13-page fault-code procedure for Injector Solenoid Driver Cylinder 3 diagnostics on CM2250 engines. It explains the circuit description, fault conditions, INSITE™ checks, rail fuel pressure sensor tests, ECM and engine harness inspections, calibration review, and fault clearing steps.
Official Cummins 1142 troubleshooting manual document details
| Brand | Cummins |
| Model coverage | ISB6.7 CM2250; ISC8.3 and ISL9 CM2250; ISX15 CM2250; ISX11.9 CM2250; QSL9 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs |
| Publication no. | 4022254 for ISB6.7 CM2250; 4022257 for ISC8.3 and ISL9 CM2250; 4022250 for ISX15 CM2250; 2883445 for ISX11.9 CM2250; 4022256 for QSL9 CM2250 |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting section Last Modified: 27-Oct-2010 |
| Pages | 13 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- FAULT CODE 1142 – Injector Solenoid Driver Cylinder 3 – Mechanical System Not Responding or Out of Adjustment
- 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 2A – Inspect the rail fuel pressure sensor and connector pins.
- Guided Step 3 – Check the ECM and engine harness.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
This procedure applies to the Cummins CM2250 engine models named in the associated procedures table: ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, and QSL9 CM2250. The fault covered is Fault Code 1142, SPN 653 FMI 7, for Injector Solenoid Driver Cylinder 3 – Mechanical System Not Responding or Out of Adjustment, where the ECM detects that injection timing does not match expected injector timing. See the official Cummins website.
Who needs this Cummins 1142 troubleshooting manual manual
Workshop technicians, diesel mechanics, and fleet service managers need this document when an amber CHECK ENGINE lamp or MIL is linked to Fault Code 1142 and possible reduced engine performance. The procedure directs checks for other fuel system related fault codes before replacing the fuel injector, then verifies the rail fuel pressure sensor circuit, ECM connectors, engine harness, ECM response, and calibration status.
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