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16 pin J1962 OBD-2 car diagnostic connector layout
16 pin J1962 OBD-2 car diagnostic connector
Isuzu use J1850-VPW interface from 1996 to nowdays
Isuzu vehicle function
1   SIR (GM8192 Prot.)
2 J1850 n/a
3    ABS (KW81-Prot.)
4 GND  Chassis ground
5 SGND  Signal Ground
7 K-Line K-Line, K1 (engine)
8   n/a
9   ECM/TCM (GM8192 Prot.)
10  PWM n/a
11   SIR
12   ABS
13   ECM
14  HS-CAN(-) n/a
15 L-Line n/a
16  Battery+ Battery +, unswitched



OBD-2 compatibility list

Note that list is not 100% complete!

Model Engine Year (starting from) OBD-2 Protocol
Isuzu D-max 2.5 TD, Diesel (136HP) 2007 CAN 11bit (500kb)
Isuzu KB250 2500, Diesel (112HP) 2011 CAN 11bit (500kb)
Isuzu NPR (24V version), Diesel (148 HP) 2008 CAN 
Isuzu Rodeo 3.2, Gasoline (196HP) 1996 VPN
Isuzu Trooper   1998 VPW J1850 
Isuzu Trooper 3.5L, Gasoline (215HP) 2000 VPN

Some OBD-II cables schemes:OBD-2 ISO 9141-2 (14230-4, KWP2000) simple serial cable
OBD-2 J1850 PWM, J1850 VPW serial ELM327 cable
OBD-2 universal ISO 15765-4 CAN, SAE J1850 PWM, SAE J1850 VPW, ISO 9141-2, ISO 14230-4 and SAE J1939 diagnostic cable


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Isuzu OBD II diagnostic interface visual pinout:click to enlarge
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