This Cummins ISB wiring diagram is a diagnostic PDF for the ISB light-duty engine electrical system and related fault code information. It combines connector pinouts, ECM and OEM wiring responsibility notes, electrical specifications, sensor checks, and fault code tables for trained technicians. The file is Bulletin 3666263 and is supplied as a 6-page PDF.
Official Cummins ISB wiring diagram document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB Light Duty; Cummins Engine Company ECM Part No. 3942336 shown in the extract |
| System/Group | Chung; wiring diagram and fault code information |
| Publication no. | Bulletin #3666263; Parte No. 3666263 |
| Year/Revision | Unknown; diagram date shown as 1/30/97 |
| Pages | 6 |
| File size | 3.0 MB |
| Format | |
| Language | English, with Spanish labeling on the final page |
Document table of contents
- ISB Light Duty Wiring Diagram
- OEM Responsibility and Cummins Responsibility wiring boundaries
- 43 Pin OEM Interface Connector and engine connector pin views
- VP44 connector, VP44 fuel pump control module, lift pump, and VP44 power shutoff circuits
- Data links including ISO 9141, vehicle datalink, and J1939 data link
- Electrical Specifications
- Sensor Specifications
- Accelerator Pedal (IVS, ISS, & APS)
- ISB Light-Duty Fault Code Information
- Fault code tables with lamps, SPN, FMI, Chrysler P Codes, reason, and effect
Applicable truck models
This document applies to Cummins ISB Light Duty engine applications using the wiring layout, ECM interface, VP44 pump control, engine speed and position sensors, oil pressure sensor, intake manifold pressure sensor, coolant temperature sensor, intake manifold air temperature sensor, accelerator position circuits, water-in-fuel signal, wait-to-start lamp, intake air heater controls, and related OEM interface circuits shown in the extract. The document also references Chrysler P Codes, so it is relevant where this Cummins engine and diagnostic code format are used by the equipment manufacturer; circuit use still depends on the OEM application note in the diagram. For manufacturer information, visit Cummins official website.
Who needs this Cummins ISB wiring diagram manual
This manual is for diesel mechanics, electrical diagnostic technicians, and workshop owners troubleshooting ISB Light Duty no-start, rough running, derate, datalink, wait-to-start, sensor supply, VP44 pump, and water-in-fuel faults. It is intended for trained, experienced technicians because the extract warns that improper troubleshooting or repair can cause severe personal injury, death, or property damage.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
Applies to these truck models
This is the manufacturer document shared across 2 model families. It applies to:
- CUMMINS WIRING DIAGRAMS
- Cummins
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