Specifications

Table Of Contents
Engine Management and Data Acquisition SystemsPage 44
M4e Comms Pinout
9 Pin DSub
Pin 2 = TX - Connects to ECU Pin 22 Green Wire
Pin 3 = RX - Connects to ECU Pin 23 Orange Wire
Pin 5 = 0v - Connects to ECU Pin 21 Brown Wire
What is an M4e?
M4e refers to a new generation of M4. e difference between M4e and the older M4 version is the com-
munications spec. e M4e has RS-232 communications which do not require a special cable. M4 ECU’s
with serial numbers greater than 3000 are the new M4e and do not require the special cable. Additionally no
Software Upgrade Unit is required to upgrade the software version on the M4e.
M RS-232 MK3 M
Communications Cable for M48 / M8 with ADL
link. Allows ECU data to be sent to ADL
M RS-232 M4E
10’ RS-232 Serial Cable, M4e and
M800/880 with DOS Software
Communications Cable for M48 / M8. Available in 6 or 20 foot lengths
M RS-232 MK 3
6 foot harness
M RS-232 MK3 6M
20 foot harness
Comm Cables ECU-PC
Note: M4 ECU’s with serial number greater than 3000
do not require SUU to upgrade!
M4 SUU
M4 / M48 / MIL-Spec M8 Software update unit (SUU)
required for firmware updates
Update Units