This code 322 DTCs document is a troubleshooting PDF for the injector solenoid driver cylinder 1 circuit on ISB6.7 CM2150 engines. It explains the circuit description, fault logic, likely causes, INSITE™ checks, harness inspection, injector isolation, and final fault-code clearing steps. The fault condition is defined as current below normal or an open circuit, with the amber CHECK ENGINE light and possible rough running or misfire.
Official code 322 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); references ISC and ISL CM2150 service information |
| System/Group | DTCs / Injector Circuit |
| Publication no. | Not listed; references ISB Series 6.7L Engines Service Manual Bulletin 4021578 and ISC and ISL CM2150 Service Manual Bulletin 4021569 |
| Year/Revision | Last modified 27-Sep-2010; overview last modified 03-Aug-2010 |
| Pages | 31 |
| File size | 0.4 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 for active fault codes.
- Guided Step 2 – Check the injector and injector circuit.
- Guided Step 3 – Check the engine harness.
- Guided Step 5A – Disable the fault code.
- Guided Step 5B – Clear the inactive fault codes.
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 engines in the 2007-09 group and covers the injector circuit diagnostic for cylinder 1. The extract also references ISC and ISL CM2150 procedures for injector isolation and service manual support, but the listed file group is ISB6.7 CM2150. For manufacturer information, visit Cummins official website.
Who needs this code 322 DTCs manual
Workshop owners, diesel technicians, and fleet mechanics need this code 322 DTCs manual when diagnosing an active SPN 651 FMI 5 injector solenoid driver fault. It is useful when checking ECM calibration, rocker-housing pass-through connectors, injector harness continuity, short circuits to ground, and same-bank injector fault codes 322, 324, and 331.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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