Diagnostic socket
Pin 2 - J1850 Bus+
Pin 4 - Chassis Ground -
Pin 5 - Signal Ground -
Pin 6 - CAN High (J-2284)
Pin 7 - ISO 9141-2 K Line
Pin 10 - J1850 Bus
Pin 14 - CAN Low (J-2284)
Pin 15 - ISO 9141-2 L Line
Pin 16 - Battery Power +
Note: OBD II oxygen sensor designation
Bank 1 is the side of the vehicle that the 1 cylinder is on.
Bank 2 is the side of the vehicle that the 2 cylinder is on.
Sensor 1 means that it's the first sensor in line (i.e the one at the manifold)
Sensor 2, 3, etc are each next sensor as they placed from the engine to the end of the vehicle.
B1S1= driver side upstream
B2S1= passenger side upstream
B1S2= after Y, ahead of cat-converter
B1S3= post cat-converter
4- Cylinder Engines Pre-cat sensor (B1 S1)
Post-cat sensor (B1 S2)
6-8 Cylinder Engines Bank 1 (Passenger Side) Bank 2 (Driver Side)
Pre-cat sensor (B1 S1) Pre-cat sensor (B2 S1)
Post-cat sensor (B1 S2) Post-cat sensor (B2 S2)
This is standard SAE for OBD2.
The O2 at the outlet of the exhaust manifold for cylinders 1, 3, 5, 7 is B1S1, the O2 at the outlet of the exhaust manifold for cylinders 2, 4, 6, 8 is
B2S1, the O2 after the "Y" in the exhaust, since it is fed by bank one becomes B1S2, the O2 after the cat, since it is fed by bank one becomes B1S3. Once the exhaust pipes join together at the "Y" bank two is no longer an identifier.
The first character shows which area of the vehicle generated the code.
P PowerTrain
B Body
C Chassis
U Network
The next Character can be a 0 or a 1, 2, 3
0 Standard (SAE) OBD code
1,2,3 Manufacturers own code
If the first character was P (PowerTrain) then the next will be a number
0 Fuel and Air Metering
1 Fuel and Air Metering
2 Injector Fuel and Air Metering Circuit
3 Ignition System and Misfire Detection
4 Auxilliary Emission Controls
5 Vehicle Speed control and Idle Control System
6 Computer Output Circuit
7,8,9 Transmission Related Faults
The last two numbers which will identify the specific fault by the onboard control system.
P 0 1 7 0
1 2 3 4 5
1st digit
P = powertrain
B = Body
C = Chassis
2nd digit
0 = Standard
1 = Manufacturer specific
3rd digit
1 = Emission management
2 = Injector circuit
3 = Ignition
4 = Auxiliary emission
5 = Vehicle speed & idle control
6 = Computer & output circuit
7,8,9 = Transmission
Pin 4 - Chassis Ground -
Pin 5 - Signal Ground -
Pin 6 - CAN High (J-2284)
Pin 7 - ISO 9141-2 K Line
Pin 10 - J1850 Bus
Pin 14 - CAN Low (J-2284)
Pin 15 - ISO 9141-2 L Line
Pin 16 - Battery Power +
Note: OBD II oxygen sensor designation
Bank 1 is the side of the vehicle that the 1 cylinder is on.
Bank 2 is the side of the vehicle that the 2 cylinder is on.
Sensor 1 means that it's the first sensor in line (i.e the one at the manifold)
Sensor 2, 3, etc are each next sensor as they placed from the engine to the end of the vehicle.
B1S1= driver side upstream
B2S1= passenger side upstream
B1S2= after Y, ahead of cat-converter
B1S3= post cat-converter
4- Cylinder Engines Pre-cat sensor (B1 S1)
Post-cat sensor (B1 S2)
6-8 Cylinder Engines Bank 1 (Passenger Side) Bank 2 (Driver Side)
Pre-cat sensor (B1 S1) Pre-cat sensor (B2 S1)
Post-cat sensor (B1 S2) Post-cat sensor (B2 S2)
This is standard SAE for OBD2.
The O2 at the outlet of the exhaust manifold for cylinders 1, 3, 5, 7 is B1S1, the O2 at the outlet of the exhaust manifold for cylinders 2, 4, 6, 8 is
B2S1, the O2 after the "Y" in the exhaust, since it is fed by bank one becomes B1S2, the O2 after the cat, since it is fed by bank one becomes B1S3. Once the exhaust pipes join together at the "Y" bank two is no longer an identifier.
The first character shows which area of the vehicle generated the code.
P PowerTrain
B Body
C Chassis
U Network
The next Character can be a 0 or a 1, 2, 3
0 Standard (SAE) OBD code
1,2,3 Manufacturers own code
If the first character was P (PowerTrain) then the next will be a number
0 Fuel and Air Metering
1 Fuel and Air Metering
2 Injector Fuel and Air Metering Circuit
3 Ignition System and Misfire Detection
4 Auxilliary Emission Controls
5 Vehicle Speed control and Idle Control System
6 Computer Output Circuit
7,8,9 Transmission Related Faults
The last two numbers which will identify the specific fault by the onboard control system.
P 0 1 7 0
1 2 3 4 5
1st digit
P = powertrain
B = Body
C = Chassis
2nd digit
0 = Standard
1 = Manufacturer specific
3rd digit
1 = Emission management
2 = Injector circuit
3 = Ignition
4 = Auxiliary emission
5 = Vehicle speed & idle control
6 = Computer & output circuit
7,8,9 = Transmission
