This document is a fault code 272 DTCs troubleshooting manual for the fuel pump pressurizing assembly circuit. It explains the circuit description, fault conditions, ECM actions, clearing conditions, and guided electrical checks for the actuator, engine harness, and ECM connectors.
Official fault code 272 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, with associated coverage references for ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, QSL9 CM2250, and QSB6.7 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Engine Fuel Pump Pressurizing Assembly 1 Circuit |
| Publication no. | 4022254 |
| Year/Revision | Last modified 11-Jun-2010 and 10-Dec-2010 |
| Pages | 16 |
| 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
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Check the fuel pump actuator and circuit.
- Guided Step 3 – Check the ECM and engine harness.
- Guided Step 4B – Disable the fault code.
Applicable truck models
The file is listed for Cummins ISB6.7 CM2250 diagnostic trouble codes and identifies Fault Code: 272, SPN: 1347, FMI: 3. The associated procedure table also references ECM, ECM Calibration Code, Engine Wiring Harness, and Fuel Pump Actuator procedures for ISB6.7 CM2250 and related CM2250 engines including ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250. The fault concerns high signal voltage or an open circuit detected at the fuel pump actuator circuit, with possible causes including short to battery, short pin-to-pin, short to ground, open circuit, low actuator resistance, loose pins, damaged seals, moisture, debris, connector shell damage, or wire insulation damage. See the manufacturer at Cummins official website.
Who needs this fault code 272 DTCs manual
This manual is for diesel mechanics, fleet technicians, and workshop owners diagnosing an engine that will not run or runs poorly because the ECM detects a fuel pump actuator circuit problem. It is useful when checking INSITE™ fault status, actuator resistance, diagnostic signal voltage, return circuit continuity, ECM connector pins, engine harness shorts, and calibration revision status.
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