Kia 20 pin diagnostic connector pinout and wiring @ pinoutsguide.com

used in all models manufactured in 1990-1996's and some later

Pin Number	Pin Name	Description (may be empty)
1	+12V	Power, after fuel pump
2		Cooling fan signal
3		Engine rotation speed / ignition signal
4	GND	Ground
5	+12V	+12V power
7		initial ignition management (coil 2)
8	L-Line	ABS diagnostic
9	K-Line	Engine diagnostic
10		Automatic transmission failure code
11		Check Engine indicator. Self-diagnostic codes output.
12	GND	Ground
14	K-Line	Airbag diagnostic
15	K-Line	ABS diagnostic codes
16		initial ignition management (coil 1)
17	K-Line	Cruise-control
18	L-Line	Automatic transmission diagnostic
19	L-Line	Engine diagnostic
20		Engine monitor output

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connector or cable wiring scheme

Kia 20 pin diagnostic connector pinout