⭐⭐⭐⭐⭐ 106 reviews

• Price: $2,300
• Manufacturer: Cummins
• Warranty: No
• Repair Warranty: 1 Year
• Core Charge: $700

The Cummins ISX engine control module (ECM) is responsible for controlling and monitoring the engine's performance, including fuel injection, timing, and other key functions. A malfunctioning or damaged ECM can cause a variety of problems, including poor performance, reduced fuel efficiency, and even engine failure.

Read the full Cummins ISX CM870 Manual Here. This manual goes over

• Inputs
• connector pins
• and fault codes 

For ISX CM870 Wiring Diagram you can see the pdf here.

Yes. It is possible to repair a Cummins ISX ECM. In fact, at Truck ECM, we specialize in repairing and rebuilding ECMs for a variety of diesel engines, including the Cummins ISX. We’ve spent years developing the expertise and equipment necessary to diagnose and repair a wide range of ECM problems, including software issues, faulty components, and physical damage.

With the low quantity of ECMs on the market, we spend time refurbishing ECMs in order to save you money and time. Over time, key parts of an ECM need to be replaced. At Truck ECM, we do intensive tests to understand what parts failed and replace them with electronic components that meet or surpass the original equipment manufacturer’s (OEM) specifications. Once the ECM is rebuilt, it’s again tested and reprogrammed to meet your truck’s specific parameters.

Damaged Microprocessor: One of the most common issues that can affect an ECM is a failure of the microprocessor. This can be caused by a variety of factors, including electrical surges, water damage, or physical impact. In many cases, a failed microprocessor can be replaced, allowing the ECM to be repaired and restored to its original functionality.

Circuit Board Damage: Another common issue that can affect the Cummins ISX ECM is corrosion or damage to the circuit board. This can be caused by exposure to moisture, heat, or other environmental factors. If the damage is not too severe, the circuit board can often be repaired by replacing damaged components or by rewiring damaged connections.

When you see these symptoms its a good idea to get a repair or replacement:

Engine misfires or runs roughly: If the engine is not firing properly, it may be due to a problem with the ECM.

Reduced fuel efficiency: A bad ECM may cause the engine to run less efficiently, resulting in decreased fuel economy.

Warning lights on the dashboard: If warning lights related to the engine come on, it may be a sign that the ECM is malfunctioning.

Engine stalling or not starting: A failed ECM may cause the engine to stall or prevent it from starting altogether.

If you suspect that your Cummins ISX engine is experiencing ECM problems, it is recommended that you take it to a qualified mechanic to diagnose the issue and make any necessary repairs. At Truck ECM we have the expertise to get you back on the road faster.

In some cases, however, the damage to the ECM may be too severe to be repaired. For example, if the circuit board is badly damaged or if key components such as the microprocessor or memory chips are irreparably damaged, it may be necessary to replace the entire ECM. In these cases, a qualified diesel engine mechanic can help you determine the best course of action.

At Truck ECM we start by diagnosing you ECM to see if its salvageable. If we find that it is broken beyond repair, we are happy to exchange your ECM for a refurbished ECM that we keep on hand and ready to ship. We offer 1-2 day expedited shipping on all ECMs in the US. Call now to see if you need to exchange your ECM today.