Cummins ECM CM2150 Insulation harness

Jaltest JDCM2150 - Cummins ECM CM2150 Insulation Harness

The JDCM2150 (Cojali part number 78901065) is the Cummins CM2150 ECM insulation harness required to perform the Jaltest Central Services Cummins Revision Update on engines equipped with the CM2150 engine control module. This is not a standard diagnostic cable — it is a specialized interface harness used during the OEM ECM update procedure conducted by Cojali's US-based ASE-certified technicians through the Central Services remote assistance program.

What the Cummins Revision Update Does

The Jaltest Central Services Cummins Revision Update (part #70810000, $250.00 per action) allows shops to perform OEM-level Cummins ECM calibration updates. Cojali's technicians carry out the procedure remotely while you are connected to the vehicle. The JDCM2150 harness is required on the ECM during this procedure. The process works as follows:

1. Verify initial conditions through Jaltest Diagnostics software
2. Request the Central Services action through Cojali USA or your distributor
3. Payment is processed
4. Schedule a convenient time — Cojali customer support technician performs the update remotely

Harness Specifications

• SKU: JDCM2150
• Cojali Part Number: 78901065
• Application: Cummins ECM CM2150
• Function: Insulation harness for ECM update procedure
• Required For: Jaltest Central Services Cummins Revision Update (action #70810000)
• Also Requires: Active Jaltest CV license and Jaltest Link V9
• MSRP: $285.00

Free Central Services Action With Purchase

Per the 2025 Jaltest Pricelist: purchasing any Cummins ECM insulation harness (including the JDCM2150) includes one free Cummins Central Services Revision Update action (valued at $250.00). The Detroit Diesel Central Services action is not eligible for this promotion. This means your first Cummins ECM update is effectively included with the harness purchase.

Which Cummins Platforms Need Which Harness

Match the harness to the ECM generation on your Cummins engine:

• JDCM2150 (78901065, $285) — Cummins ECM CM2150 — ISX, ISM, ISC/ISL early emissions era
• JDCM217.9 (78901067, $285) — Cummins ECM CM2250
• JDCM2250 (78901066, $285) — Cummins ECM CM2350 / CM2450
• JDCM850 (78901064, $285) — Cummins ECM CM850

Who Needs This Harness

Shops that service Cummins-powered trucks, buses, or equipment with CM2150 ECMs who want to perform ECM calibration updates in-house through Jaltest Central Services. This brings dealer-level ECM update capability to your shop with Cojali technician support, eliminating trips to the Cummins dealer for this procedure.

Why Buy From OEM Diagnostic Tools?

OEM Diagnostic Tools has specialized in professional diagnostic equipment since 2016. We carry all four Cummins ECM harnesses. Free shipping on every order. Free tech support at 866-217-0063 — we can help you confirm which harness matches your engine and walk you through the Central Services process. Full warranty on every purchase.

Call 866-217-0063 for quick answers and help!