20 pin car OBD2 proprietary connectorat the car side
Pin
Signal
Description
1
Engine rotation speed
TD
2
OBD-II diagnostic
7
Oil service and Inspection reset
11
External starter turn on
14
Battery power
15
ISO 9141-2 L Line
RXD- Diagnostic Data link
16
Ignition +12V
17
ISO 9141-2 K Line
n/c?
18
PGSP
Programming line
19
GND
20
TXD - Diagnostic data link
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