Appendix j: ecu to acl wiring (rs232), 78 appendices, M4e ecu – MoTeC ACL VIM User Manual
Page 82

78 Appendices
Appendix J: ECU to ACL Wiring (RS232)
The following details the methods for connecting the various MoTeC ECUs to 
the ACL via RS232. In all cases this is done using the serial data stream 
generated by the Telemetry function of each ECU. 
In the case of the M800, M880 and M4e the ACL may be directly wired to the 
ECU because these ECUs use RS232 interface levels. On the M48, M4 (pre 
M4e) and the M8, a Computer Interface Module (CIM) or a PCI cable is 
required to convert the signals to RS232. 
M800 / M880
2
3
5
M800 / M880
ECU
B17 / 40
B18 / 31
B14 / 13
9 pin PC 
Connector 
(if used) 
ACL
15
Note The data to the ACL will be interrupted while a PC is connected (DOS 
software only) 
Note The 9 pin connector is not used if using the Windows Calibration 
software. 
Note Data may be sent to the ACL via the CAN bus as an alternative to the 
serial connection. 
M4e
2
3
5
M4e ECU
22
23
5
9 Pin PC 
Connector 
ACL
15
Note Older M4 ECUs require a different connection method
Note The data to the ACL will be interrupted while a PC is connected.
