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15 pin D-SUB male connector layout
15 pin D-SUB male connector
X431
Pin Number
X431
Pin Name
Direction OBD
Pin Number
OBD
Pin Name
Description
1 12 volts to 16 12volts voltage supply
2 CAN B+ to 2 CAN B+ J1850 + line
3 CAN B- to 10 CAN B- J1850 - line
5 diag control to 1 diag control very important
7 K to 7 MPI, ecu, ISO9141 K-line
8 CAN + to 6 CAN + transmission ELC AT control
9 Vendor spec to  8 ABS  
10 vendor spec to 12 vendor spec  
11 vendor spec to 11 AC  
12 Vendor spec to 13 ASC cruise control  
13 SWS to 3 ECS suspension line ECS control
14 CAN Low to 15 CAN Low ISO 9141 L-line
15 ground to 4 and 5 chassis/signal ground ground

Omitted pins are Not Connected.

16 pin J1962 OBD-2 car diagnostic connector layout
16 pin J1962 OBD-2 car diagnostic connector
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