OBD2 pin signals....
Thread Starter
Le Mans Master
Joined: Mar 1999
Posts: 6,692
Likes: 56
From: Troutman, NC
OBD2 pin signals....
Does anyone have a schematic showing which pins in the OBD2 plug carries which signals, such as RPM, throttle position, etc?
I'm trying to get inputs for my Data Acquisition system without splicing into wires. In additon to the above, I'd like to get steering angle, brake pressure and oil pressure if possible.
TIA!
I'm trying to get inputs for my Data Acquisition system without splicing into wires. In additon to the above, I'd like to get steering angle, brake pressure and oil pressure if possible.
TIA!
Racer
Joined: Jul 2006
Posts: 447
Likes: 0
From: San Jose Ca
Does anyone have a schematic showing which pins in the OBD2 plug carries which signals, such as RPM, throttle position, etc?
I'm trying to get inputs for my Data Acquisition system without splicing into wires. In additon to the above, I'd like to get steering angle, brake pressure and oil pressure if possible.
TIA!
I'm trying to get inputs for my Data Acquisition system without splicing into wires. In additon to the above, I'd like to get steering angle, brake pressure and oil pressure if possible.
TIA!
Melting Slicks
Joined: Jul 2007
Posts: 2,939
Likes: 7
From: Simpsonville SC
St. Jude Donor '09-'10
Here is what I found for you:
OBD II Connector Pinout
For vehicles sold inside the US, the government mandates OBD II compliance so inspecting your vehicle's connector is not necessary, except if you are concerned that your vehicle might be equipped with CAN.
Vehicle OBD II Connector (front view)
CAN Protocol Pins
If pins 5, 6, 14 and 16 are populated, the vehicle supports CAN. The A-300, A-301 and A-302 Dyno-Scan supports this vehicle.
Pin # Description
5 Ground
6 Data
14 Data
16 Power
ISO and KWP Protocol Pins
If pins 5, 7, 16 and, optionally, 15 are populated, the vehicle supports ISO or KWP. The A-100, A-101, A-300, A-301 and A-302 Dyno-Scan supports this vehicle.
Pin # Description
5 Ground
7 Data
15 Data (this pin is optional and may not be present)
16 Power
VPW Protocol Pins
If pins 2, 5 and 16 are populated, the vehicle supports VPW. The A-100, A-101, A-300, A-301 and A-302 Dyno-Scan supports this vehicle.
Pin # Description
2 Data
5 Ground
16 Power
PWM Protocol Pins
If pins 2, 5, 10 and 16 are populated, the vehicle supports PWM. The A-100, A-101, A-300, A-301 and A-302 Dyno-Scan supports this vehicle.
Pin # Description
2 Data
5 Ground
10 Data
16 Power
OBD II Connector Pinout
For vehicles sold inside the US, the government mandates OBD II compliance so inspecting your vehicle's connector is not necessary, except if you are concerned that your vehicle might be equipped with CAN.
Vehicle OBD II Connector (front view)
CAN Protocol Pins
If pins 5, 6, 14 and 16 are populated, the vehicle supports CAN. The A-300, A-301 and A-302 Dyno-Scan supports this vehicle.
Pin # Description
5 Ground
6 Data
14 Data
16 Power
ISO and KWP Protocol Pins
If pins 5, 7, 16 and, optionally, 15 are populated, the vehicle supports ISO or KWP. The A-100, A-101, A-300, A-301 and A-302 Dyno-Scan supports this vehicle.
Pin # Description
5 Ground
7 Data
15 Data (this pin is optional and may not be present)
16 Power
VPW Protocol Pins
If pins 2, 5 and 16 are populated, the vehicle supports VPW. The A-100, A-101, A-300, A-301 and A-302 Dyno-Scan supports this vehicle.
Pin # Description
2 Data
5 Ground
16 Power
PWM Protocol Pins
If pins 2, 5, 10 and 16 are populated, the vehicle supports PWM. The A-100, A-101, A-300, A-301 and A-302 Dyno-Scan supports this vehicle.
Pin # Description
2 Data
5 Ground
10 Data
16 Power
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
It is a serial data stream, You'll need GM specific S/W to decipher most of the Non-generic OBD data. $200 can get the H/W and S/W to do it and do bi-directional tests. I use autoenginuity for my GM and Ford stuff.
There are"Generic" OBD codes that the cheap OBD readers can get to but each manufacturer can use their own codes/test too.
There are"Generic" OBD codes that the cheap OBD readers can get to but each manufacturer can use their own codes/test too.
Last edited by dougbfresh; Dec 25, 2007 at 03:33 PM.
Melting Slicks
Joined: Jul 2007
Posts: 2,939
Likes: 7
From: Simpsonville SC
St. Jude Donor '09-'10
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
Burning Brakes
Joined: Jul 2003
Posts: 843
Likes: 9
From: Laguna Hills CA
Direct OBD2 support will depend on the DA that you're using. The factory OBD port does not carry anything over and above the comm lines, meaning it's not like Porsche and a few others that also carry RPM and the like.
For direct DA, it's likely that you'll need to tap a few of the signal lines for what' you're after. Over and above that and assuming that your DA does not directly support VPW, you're down to tracking two separate sources and synchronizing the data.
For direct DA, it's likely that you'll need to tap a few of the signal lines for what' you're after. Over and above that and assuming that your DA does not directly support VPW, you're down to tracking two separate sources and synchronizing the data.
