Olga Weis
Last updated Apr 12, 2023
On-Board Diagnostics II, or OBD2, is a self-diagnostic and reporting system in modern vehicles. It consists of an Electronic Control Unit, several sensors, and indicator lights. The sensors inspect the various subsystems within the vehicle and report any faults and abnormalities to the ECU.
Of course, simply reporting faults would be pointless if there was no way to read the errors and act on them. Hence, the ECU generates Diagnostic Trouble Codes and stores them for inspection by external OBD scanners. These codes are accessed through an OBD2 connector plugged into the 16-pin OBD port.
Consequently, repair technicians can analyze the error codes using a scan tool attached to the other end of the connector.
Are you confused by the various terminology thrown about? Read on to learn what an OBD2 connector is and its purpose in your vehicle.
The OBD2 connector is one end of the adapter cable plugged into your vehicle’s OBD port. It is a communication interface that allows you to transmit information between a diagnostic scan tool and the vehicle’s OBD2 system.
OBD2 connectors come in two flavors; wired and wireless. As the name suggests, the wired connector must be physically attached to the scan tool through the cable. On the other hand, wireless OBD2 connectors interface with the scan tool using Bluetooth or WiFi.
The OBD2 connector is designed to read and translate real-time diagnostic information from the Electronic Control Unit (ECU). As such, you can tell what is wrong with the vehicles from the error codes received through the connector. Furthermore, it allows you to use scan tools to reprogram and repair the various subsystems within the vehicle. Recently, remote diagnostic systems have become increasingly popular.
There are two major types of OBD2 connectors. Type A connectors have a 12V output voltage and are commonly found in small vehicles such as cars. However, type B connectors are usually found in medium-sized and heavy vehicles. Moreover, they have an output power supply of 24V.
Baud rate is the rate of information transfer in serial communication channels. A rate of 24,000 bauds means the port can transfer up to 24,000 bits per second. Type A connectors have an approximate baud rate of 500,000 bauds, while type B connectors have a maximum baud rate of 250,000.
The higher the baud rate, the shorter the length of the adapter cable. As such, it is not uncommon to find type B connectors with longer cables than type A connectors. Nevertheless, you should note that this is not a reliable method of distinguishing between the two cable types.
OBD2 connectors are typically 16-pin ports, each pin serving a distinct purpose. Some pins use standard protocols defined by the Society of Automotive Engineers and the International Organization for Standardization. Other pins are left to the manufacturer’s discretion.
The table below gives a quick overview of each pin in a generic OBD2 connector.
| Pin No | Pin Name | Description |
| 1 | Manufacturer Discretionary | This pin is non-standard and depends on the vehicle’s manufacturer. It is not required for normal communication. |
| 2 | SAE J1850 Bus+ | Bus positive pin of the protocol. It uses the Variable Pulse Width protocol and is typically found in General Motors vehicles. |
| 3 | Manufacturer Discretionary | This pin is non-standard and depends on the vehicle’s manufacturer. It is not required for normal communication. |
| 4 | Chassis Ground | The ground of the Car system (including chassis). |
| 5 | Signal Ground | The ground of the Car system (including chassis). |
| 6 | CAN High ISO 15765-4, SAE J2284 | CAN High Pin. It follows a 2-wire CAN protocol at 1Mbps speed. |
| 7 | ISO 9141-2 / ISO 14230-4 K Line | K line pin. It follows an asynchronous serial communication protocol. |
| 8 | Manufacturer Discretionary | This pin is non-standard and depends on the vehicle’s manufacturer. It is not required for normal communication. |
| 9 | Manufacturer Discretionary | This pin is non-standard and depends on the vehicle’s manufacturer. It is not required for normal communication. |
| 10 | SAE J1850 Bus- | Bus negative pin of the protocol. It follows the Variable Pulse Width protocol. |
| 11 | Manufacturer Discretionary | This pin is non-standard and depends on the vehicle’s manufacturer. It is not required for normal communication. |
| 12 | Manufacturer Discretionary | This pin is non-standard and depends on the vehicle’s manufacturer. It is not required for normal communication. |
| 13 | Manufacturer Discretionary | This pin is non-standard and depends on the vehicle’s manufacturer. It is not required for normal communication. |
| 14 | CAN Low ISO 15765-4, SAE J2284 | CAN Low Pin. It uses a 2-wire CAN protocol at 1Mbps speed. |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) | K-line pin. It uses an asynchronous serial communication protocol. |
| 16 | Vehicle Battery Power | Connects to the vehicle’s battery to power scan tools. Type "A" 12V/4A; Type "B" 24V/2A |
Each of these pins is explained in-depth below.
OBD2 ports are standardized to work with any commercially available scan tool. However, several pins, including 1, 3, 8, and 9 are not required for standard communication. As a result, vehicle manufacturers encode these pins to transmit information specific to each vehicle's make and model.
Furthermore, the standardized pins encode different types of data to be decrypted by the scan tool. Finding specific information about each vehicle manufacturer can be difficult and confusing. Luckily, we have compiled a spreadsheet of the OBD2 pinouts of some popular car manufacturers. Simply click on the name of the brand you're interested in to see its OBD2 pin layout.
| Pin Number | Description |
| 1 | IGN; Switched to +12V when the ignition is on |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line |
| 8 | Manufacturer Discretionary |
| 9 | Manufacturer Discretionary |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Manufacturer Discretionary |
| 12 | Manufacturer Discretionary |
| 13 | Manufacturer Discretionary |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Manufacturer Discretionary |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line |
| 8 | Manufacturer Discretionary |
| 9 | SCS (Service Check System) - diagnostic codes |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Manufacturer Discretionary |
| 12 | Programming out |
| 13 | Input/Output for VTM-4 and immobilizer control |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Switched +12V Ignition Signal |
| 2 | Unused (or unknown) |
| 3 | Ethernet RX+ |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) (500Kbps) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line (10.4Kbps) |
| 8 | Secondary K Line for Body/Chassis/Infotainment Modules Ethernet Enable (via 510 Ohm, 0.6 Watt resistor to battery voltage) |
| 9 | TD (Tachometer Display) Signal / Engine RPM Signal |
| 10 | Unused (or unknown) |
| 11 | Ethernet RX- |
| 12 | Ethernet TX+ |
| 13 | Ethernet TX- |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) (500Kbps) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (10.4Kbps) (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Unused (or unknown) |
| 2 | SAE J1850 VPW Bus + (10.4Kbps) |
| 3 | CCD Bus + |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | • CAN High (ISO 15765-4 and SAE J2284) (500Kbps) • SCI A Engine (RX) (SAE J2610) (7812.5bps, 62.5Kbps, 125.0Kbps) |
| 7 | • ISO 9141-2 / ISO 14230-4 K Line (10.4Kbps) • SCI A Engine (TX) (SAE J2610) (7812.5bps, 62.5Kbps, 125.0Kbps) • SCI A Trans (TX) (SAE J2610) (7812.5bps, 62.5Kbps, 125.0Kbps) • SCI B Engine (TX) (SAE J2610) (7812.5bps, 62.5Kbps, 125.0Kbps) |
| 8 | Unused (or unknown) |
| 9 | SCI B Trans (RX) (SAE J2610) (7812.5bps, 62.5Kbps, 125.0Kbps) |
| 10 | Unused (or unknown) |
| 11 | CCD Bus - |
| 12 | SCI B Engine (RX) (SAE J2610) (7812.5bps, 62.5Kbps, 125.0Kbps) |
| 13 | Unused (or unknown) |
| 14 | • CAN Low (ISO 15765-4 and SAE J2284) (500Kbps) • SCI A Trans (RX) (SAE J2610) (7812.5bps, 62.5Kbps, 125.0Kbps) |
| 15 | • ISO 9141-2 / ISO 14230-4 L Line (10.4Kbps) (Optional) • SCI B Trans (TX) (SAE J2610) (7812.5bps, 62.5Kbps, 125.0Kbps) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | • Infotainment CAN High • Ignition Control (activates low current switching device to power ignition current) |
| 2 | SAE J1850 PWM (Ford SCP) Bus + (41.6Kbps) |
| 3 | • DCL + • Medium-Speed CAN High (125Kbps, 250Kbps) • UBP Network #1 (9600bps) |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) (500Kbps) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line (10.4Kbps) |
| 8 | • Infotainment CAN Low • Trigger Signal (multiple module trigger input controlled through the communication link to initiate / terminate an event) |
| 9 | Battery Power (Switched) (vehicle battery power available via the ignition switch or ignition control [Pin 1]) |
| 10 | SAE J1850 PWM (Ford SCP) Bus - (41.6Kbps) |
| 11 | • DCL - • Medium-Speed CAN Low (125Kbps, 250Kbps) • UBP Network #2 (9600bps) |
| 12 | Flash EEPROM |
| 13 | • FEPS — ECU Programming Voltage • Flash EEPROM |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) (500Kbps) |
| 15 | Unused by Ford |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | • Single-Wire CAN (SAE J2411 / GMW3089) (33.3Kbps) • GM UART / ALDL (SAE J2740) (8192 bit/s) |
| 2 | SAE J1850 VPW Bus + (10.4Kbps) |
| 3 | Object Detection CAN Bus + |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) (500Kbps) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line (10.4Kbps) |
| 8 | Manufacturer Discretionary |
| 9 | GM UART / ALDL (SAE J2740) (8192 bit/s) |
| 10 | Unused (or unknown) |
| 11 | Object Detection CAN Bus - |
| 12 | Chassis High-Speed CAN Bus + (500Kbps) |
| 13 | Chassis High-Speed CAN Bus - (500Kbps) |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) (500Kbps) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (10.4Kbps) (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Manufacturer Discretionary |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line |
| 8 | Manufacturer Discretionary |
| 9 | SCS (Service Check System) - diagnostic codes |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Manufacturer Discretionary |
| 12 | Programming out |
| 13 | Input/Output for VTM-4 and immobilizer control |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Gearbox diagnostic |
| 2 | ABS diagnostic, BUS+ Line |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284), ABS/ASR diagnostic |
| 7 | Engine and gearbox diagnostic ISO 9141-2 / ISO 14230-4 K Line |
| 8 | ABS diagnostic |
| 9 | Cruise-control diagnostic |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Manufacturer Discretionary |
| 12 | Airbag diagnostic |
| 13 | Manufacturer Discretionary |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) VSS (vehicle speed) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | CHECK |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line |
| 8 | Ignition ON |
| 9 | ABS |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Adjust Switch |
| 12 | SCI TX |
| 13 | SCI RX |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Gearbox diagnostic |
| 2 | ABS diagnostic, BUS+ Line |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284), ABS/ASR diagnostic |
| 7 | Engine and gearbox diagnostic ISO 9141-2 / ISO 14230-4 K Line |
| 8 | ABS diagnostic |
| 9 | Cruise-control diagnostic |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Manufacturer Discretionary |
| 12 | Airbag diagnostic |
| 13 | Manufacturer Discretionary |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) VSS (vehicle speed) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Manufacturer Discretionary |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line |
| 8 | Manufacturer Discretionary |
| 9 | Tachometer ECM |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Manufacturer Discretionary |
| 12 | Brake Actuator Assembly |
| 13 | Timing check - ignition advance angle adjustment or ABS slow codes out |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Manufacturer Discretionary |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Low speed (125Kb) CAN bus. This bus is used for some IC, RFA and other units. |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line |
| 8 | Manufacturer Discretionary |
| 9 | Manufacturer Discretionary |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Low speed (125Kb) CAN bus. This bus is used for some IC, RFA and other units. |
| 12 | Manufacturer Discretionary |
| 13 | Manufacturer Discretionary |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Ignition control (EZS), air-conditioner (KLA), PTS, safety systems (Airbag, SRS, AB) and some other |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | TD engine rotation speed |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line Engine control diagnostic (ME/MSM/CDI) |
| 8 | Manufacturer Discretionary |
| 9 | ABS, ASR, ESP, ETS, BAS diagnostic |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Gearbox and other transmission components (EGS, ETC, FTC) |
| 12 | All activity modules (AAM), Radio (RD), ICS… |
| 13 | AB diagnostic - safety systems |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) IC, KI, TAU, LWR diagnostic |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Diagnostic control |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | SWS communication line |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line MPI, CVT, SRS airbags and immobilizer |
| 8 | Manufacturer Discretionary |
| 9 | ETACS |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | ECU optimisation control |
| 12 | Manufacturer Discretionary |
| 13 | Manufacturer Discretionary |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | CHECK |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line |
| 8 | Ignition ON |
| 9 | ABS |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Adjust Switch |
| 12 | SCI TX |
| 13 | SCI RX |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Manufacturer Discretionary |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line |
| 8 | Manufacturer Discretionary |
| 9 | Manufacturer Discretionary |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Manufacturer Discretionary |
| 12 | LS CAN Bus used for low speed CAN bus, also called as multimedia CAN bus |
| 13 | LS CAN Bus used for low speed CAN bus, also called as multimedia CAN bus |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Ground |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line |
| 8 | Manufacturer Discretionary |
| 9 | SSM (Subaru Select Monitor) timing pulse |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | SSM (Subaru Select Monitor) timing pulse |
| 12 | SSM to ECM signal |
| 13 | ECM to SSM signal |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Manufacturer Discretionary |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line |
| 8 | Manufacturer Discretionary |
| 9 | Tachometer ECM |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Manufacturer Discretionary |
| 12 | Brake Actuator Assembly |
| 13 | Timing check - ignition advance angle adjustment or ABS slow codes out |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | IGN; Switched to +12V when the ignition is on |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Manufacturer Discretionary |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) |
| 7 | ISO 9141-2 / ISO 14230-4 K Line |
| 8 | Manufacturer Discretionary |
| 9 | Manufacturer Discretionary |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | Manufacturer Discretionary |
| 12 | Manufacturer Discretionary |
| 13 | Manufacturer Discretionary |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line (Optional) |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
| Pin Number | Description |
| 1 | Manufacturer Discretionary |
| 2 | SAE J1850 Bus + (VPW / PWM) |
| 3 | Low speed CAN - high |
| 4 | Chassis Ground |
| 5 | Signal Ground |
| 6 | CAN High (ISO 15765-4 and SAE J2284) High speed CAN |
| 7 | ISO 9141-2 / ISO 14230-4 K Line ABS, DSA, TCU AW, IMMOB, ECC |
| 8 | Manufacturer Discretionary |
| 9 | Manufacturer Discretionary |
| 10 | SAE J1850 Bus - (PWM-only) |
| 11 | ECU, Fenix 5.1 (Volvo S40 and some others), Low speed CAN - low |
| 12 | Manufacturer Discretionary |
| 13 | Cruise-control |
| 14 | CAN Low (ISO 15765-4 and SAE J2284) |
| 15 | ISO 9141-2 / ISO 14230-4 L Line Motor |
| 16 | Vehicle Battery Power: Type "A" 12V/4A, Type "B" 24V/2A |
