Pin type in OBD2
Thread Starter
Registered User
Joined: Sep 2023
Posts: 1
Likes: 0
Pin type in OBD2 Hello!
Can you help me understand what the pin type in OBD2 ports means? And could you also give me some guidance on how to select the correct one?
I'd really appreciate your assistance since I'm not too familiar with this stuff!
Can you help me understand what the pin type in OBD2 ports means? And could you also give me some guidance on how to select the correct one?
I'd really appreciate your assistance since I'm not too familiar with this stuff!
Teching In
Joined: Sep 2023
Posts: 4
Likes: 0
Hi! There are two main types of OBD2 connectors. Type A and type B connectors. They differ in data transmission speed and output voltage. Type A connectors have an output voltage of 12 V and are suitable for small vehicles such as cars. They have an approximate data transfer rate of 500,000 baud Type B connectors are commonly found in medium-sized and heavy-duty vehicles. In addition, they have an output voltage of 24V. They have a maximum data rate of 250,000 baud. More information here https://www.flexihub.com/oobd2-pinout/
TECH Fanatic
Joined: Jan 2018
Posts: 1,250
Likes: 239
From: Dade City, Fl.
Nice response Nickolos, HMike in the future when posing it is important to give more info , like what you are trying to do. How can you receive an accurate answer without knowing what the OBDII port is going to be used with. More info is better...you won't bore us
Welcome to both of you
Welcome to both of you 
On The Tree
Joined: Jul 2020
Posts: 120
Likes: 16
I recently had to wire/connect my port for my LS swap. I purchased a OBDII port and tried to use it. I eventually found out that there are 2 "types" of ports: A) 4 wire "older" style used before2006 and older (?) B) 5 wire "newer" style. the 5 wire is for the "faster" 2 data wire ECMs. I am not sure about the change over dates or specifics, but if you have a ECM that indicates 2 HS LAN data wires then I believe you would need the later "newer" OBDII port. the ports are exactly the same except the additional wire and I believe the port assignment is different. Not sure if this is helpful.. hopefully it is...
good luck!
good luck!
