Cummins ISX CM871 Wiring Diagram (Without Aftertreatment)

This wiring diagram covers the Cummins ISX heavy-duty truck engine with the CM871 control module, in the version supplied without an aftertreatment system.

It shows the ECM connector pinouts, sensor and injector wiring, and harness routing.

What the diagrams show

• ECM connector pinouts
• Sensor and injector wiring
• Harness routing

Compatibility

• Models: ISX with CM871, without aftertreatment
• Control module: CM871
• Configuration: Without aftertreatment
• Application: On-highway heavy-duty trucks
• Document type: Wiring diagram

Before you buy

The CM871 was built both with and without aftertreatment, depending on market and application, and the harnesses are different. This diagram is only correct for engines that left the factory without aftertreatment, so check the dataplate and the build spec for your ESN first.

Your engine's dataplate shows the engine model, the engine serial number (ESN) and the CPL number. Compare those with the models above. If you're not sure, email us the dataplate details and we'll check for you.

File format

PDF download. Nothing is shipped. Opens on a computer, tablet or phone.

We're an independent seller and are not affiliated with or endorsed by Cummins. Brand and model names are used only to identify the engines this manual covers.