The MS45 ECM is a programmable "FLASH" Control Module. The ECM contains a soldered in FLASH EPROM which can be programmed/updated up to 13 times. The EPROM has basic information always present in it referred to as "resident data". This resident data gives the EPROM its identification and contains instructions for the programming of the operational maps. When you program, you are inputting operational maps to the ECM such as injection timing and ignition timing, etc.

Always refer to the latest programming IDC Bulletin for a complete list of FLASH programmable control modules and the latest program highlights. An unprogrammed control module will not allow the engine to start . DME (ECM) FLASH programming is performed with the DISplus/GT1 using the latest software.

Using the "automatic" determination process (preferred method), the GT1 compares the part numbers stored in the FLASH EPROM of the currently installed ECM with a list of possible replacement part numbers stored in the DISPlus or GT1 memory. The comparison is done to:

Display the part number for the replacement programmable control module for that vehicle.
Determine if the GT1 can "recommend" a replacement part number(s) from the list of part numbers stored in memory.
Identify a proper replacement program or control module

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

ECM Programming - FLASH Control Modules

Use the Manual With the Right Hardware

When to See a Mechanic