How to Diagnose and Fix Code 1117 on Cummins ISX CM 871

Cummins ISX CM 871 ECM is known for having issues with code 1117.

What does code 1117 mean?

When this code appears, it indicates a disruption in the battery supply while the ignition was in the “on” position. This often results in the truck shutting down and refusing to restart.

How to troubleshoot code 1117:

The first step as per troubleshooting manual from
Cummins is to check batteries and wiring to make sure they are in good condition.

When the issue comes from the ECM:

A couple of temporary solutions involve allowing the truck to cool down before attempting to restart it and separating the ECM from the cooling plate, isolating it. However, if the underlying issue isn’t addressed, the truck may shut down again after a few minutes.

Recommendations:

ECM diagnostics: Have an ECM laboratory test the Engine Control Module (ECM) to pinpoint the root cause.
Component inspection: Inspect the batteries, wiring, and other related components for any faults.

Need more help?

If you’re unable to resolve the issue independently, consider sending the ECM to a specialized technician for diagnosis and repair. Alternatively, you can request a troubleshooting guide to perform necessary checks.

Remember: Promptly addressing code 1117 is essential to prevent further complications and ensure optimal performance of your truck.

Additional tips for a more comprehensive blog post:

• Include visuals: Use images or diagrams to illustrate the components involved and the troubleshooting process.
• Provide links: Link to relevant resources, such as Cummins’ official website or forums, for more detailed information.
• Address potential causes: Discuss common causes of code 1117, such as faulty batteries, wiring issues, or ECM malfunctions.
• Offer preventive measures: Suggest ways to prevent code 1117 from recurring, like regular maintenance and inspections.