This Cummins ISX CM570 wiring reference is the OEM interface wiring diagram for the Cummins CM570 electronic subsystem, organized as one continuous diagram split across four sheets. It is part of the DiagTechPro truck manuals library and preserves the original CM570 Electronic Subsystem Technical Package, Cummins Engine Company, Inc..
Official document details
| Brand | Cummins |
|---|---|
| Model coverage | the Cummins CM570 electronic subsystem used on ISX (and ISM) engines from 1999 to 2002, defining every OEM interface to the controller. |
| System / Group | ISX CM570 (1999-02) / Wiring Diagrams |
| Fault code | CM570 Electronic Subsystem Wiring Diagram |
| Source | CM570 Electronic Subsystem Technical Package, Cummins Engine Company, Inc. |
| Pages | 5 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Document table of contents
- Wiring diagram layout (four sheets)
- Sheet 1 – 31-pin OEM connector
- Sheet 2 – 50-pin OEM connector and engine compartment
- Sheets 3 and 4 – cab and dashboard interfaces
Diagnostic steps in the Cummins ISX CM570 wiring document
Sheet 1 shows every possible interface to the 31-pin OEM connector, including coolant-level, oil-level and air-conditioning pressure switches and the VSS options. Sheet 2 covers the 50-pin OEM connector with the J1939 and J1587 datalinks, ECM supply lines, the Water-In-Fuel (WIF) disconnect, engine brake relay and E-Governor. Sheets 3 and 4 map cab and dashboard interfaces.
The CM570 electronic subsystem wiring diagram documents every OEM interface across four sheets, so an installer can trace a circuit from the engine harness to the 31-pin or 50-pin OEM connector. Actual component locations vary by chassis builder, so confirm connector positions against the truck before probing, and always work from the sheet that matches the area you are servicing.
Applicable truck models and engines
This document applies to the Cummins CM570 electronic subsystem used on ISX (and ISM) engines from 1999 to 2002, defining every OEM interface to the controller. For factory service data, parts and warranty information, consult the official Cummins support site.
Who needs the Cummins ISX CM570 wiring manual
This diagram is for technicians and installers who need factory pin assignments for the CM570 OEM connectors when tracing or building a chassis harness.
The complete PDF is available in the DiagTechPro manuals library; a free account is required to download it.
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