This Cummins 324 injector fault document is a troubleshooting manual for Fault Code 324, Injector Solenoid Driver Cylinder 3 Circuit – Current Below Normal or Open Circuit. It explains the code reason, ECM response, likely wiring and injector causes, guided diagnostic checks, and repair validation with INSITE™ electronic service tool.
Official Cummins 324 injector fault document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; ISC8.3 and ISL9 CM2250; ISX11.9 CM2250; ISX15 CM2250; QSL9 CM2250 listed in associated procedures |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs |
| Publication no. | 4022254, 4022257, 4022250, 2883445, 4022256 listed in associated procedure references |
| Year/Revision | Last Modified: 26-Aug-2010; troubleshooting section Last Modified: 11-Oct-2010 |
| Pages | 32 |
| 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 Fault Code 324
- Guided Step 2 – Check the injector and injector circuit.
- Guided Step 2A – Inspect the engine harness connections.
- Guided Step 2D-4 – Check for an open circuit.
- Guided Step 3B-2 – Check the injector solenoids for short circuits to ground.
- Guided Step 4B – Check for active fault codes.
- Guided Step 5B – Clear the inactive fault codes.
Applicable truck models
This file applies to Cummins engine platforms named in the extract, including ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250, and QSL9 CM2250 where the associated procedures are referenced. The fault description is centered on injector solenoid driver cylinder 3 circuit behavior, with same-bank fault logic for Bank 1 – Front Bank Fault Codes 322, 324, 331 and Bank 2 – Rear Bank Fault Codes 323, 325, 332. See the manufacturer at Cummins official website.
Who needs this Cummins 324 injector fault manual
Workshop owners, diesel mechanics, and diagnostic technicians use this manual when an amber CHECK ENGINE lamp or MIL is linked to Fault Code 324, PID: S3, SPN: 653, FMI: 5/5. It is useful when checking open circuits, high resistance, injector solenoid shorts to ground, damaged connector pins, pass-through connector issues, internal injector harness insulation damage, or a possible malfunctioning or damaged ECM.
The troubleshooting flow directs technicians to turn the keyswitch ON or OFF as needed, connect INSITE™ electronic service tool, read active codes, remove the rocker cover, inspect engine harness and injector harness connectors, measure resistance to engine block ground, replace injector 3 when directed, disable the fault code by idling the engine for 1 minute, and clear inactive fault codes after repair. Full PDF available in the DiagTechPro manuals library, free account required to download.
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