RS232 Connectors - Bottom Left and Bottom Right (Lemo 5 PIN)
PIN
I/O
Function
1
O
TxD, Serial Data Transmit –
COM1 - Firmware Upgrade
2
I
RxD, Serial Data Receive –
COM1 - Firmware Upgrade
3
O
Digital Output 1 - Lap pulse/toggle
4
O
Digital Output 2 - Unused
5
O
+12 V Power
Chassis
Ground
https://racelogic.support/01VBOX_Automotive/06Displays/Multi-Function_Display_(MFD)/
31