Understanding your Toyota’s onboard diagnostics system is crucial for effective vehicle maintenance and repair. The OBD2 (On-Board Diagnostics II) port in your Toyota provides access to a wealth of information about your car’s performance and health. This article will delve into the Toyota OBD2 diagram, explaining the pinout, compatibility across different models, and the communication protocols used.
Decoding the Toyota OBD2 Port Pinout
The OBD2 port is a standardized 16-pin connector found in most vehicles, including Toyotas, manufactured from the mid-1990s onwards. While the physical connector is standard, the signals and communication protocols can vary. Here’s a breakdown of the Toyota OBD2 pinout diagram, based on common configurations:
| Pin | Signal | Description |
|---|---|---|
| 2 | J1850 Bus+ | Used in older Toyota models for J1850 communication protocols. |
| 4 | CGND | Chassis Ground – Provides a ground connection to the vehicle’s chassis. |
| 5 | SGND | Signal Ground – Ground reference for the diagnostic signals. |
| 6 | CAN High | CAN (Controller Area Network) Bus High – Part of the CAN bus communication system, used in many modern Toyotas for high-speed data transfer. |
| 7 | SIL | K-Line (ISO 9141-2 and ISO/DIS 14230-4) – Used for communication with various ECUs (Electronic Control Units) such as Occupant Detection, Transponder Key, and Tire Pressure Monitoring systems in some models. |
| 9 | TAC | Tachometer signal – Potentially connected to the ECM (Engine Control Module) for tachometer readings. |
| 10 | J1850 Bus- | Used in older Toyota models for J1850 communication protocols. |
| 12 | TS | Brake Actuator Assembly – Likely related to the braking system diagnostics. |
| 13 | TC | Timing Check – Used for ignition timing adjustments or ABS (Anti-lock Braking System) diagnostics in some cases. |
| 14 | CAN Low | CAN Bus Low – Part of the CAN bus communication system, complementing CAN High for robust data exchange. |
| 15 | L-LINE | L-Line (ISO 9141-2 and ISO/DIS 14230-4) – Used in older models for ISO communication protocols. |
| 16 | +12V | Battery Power – Provides power to the diagnostic tool from the vehicle’s battery. |
Pins not listed in this diagram are typically not connected and are reserved for future or manufacturer-specific uses.
Alt text: Toyota OBD2 port pinout diagram showing pin numbers and descriptions for diagnostic communication.
Toyota OBD2 Compatibility: A Model-by-Model Look
While OBD2 is a standard, the specific protocols and implementation can differ across Toyota models and production years. The following table provides a compatibility list for various Toyota vehicles, outlining the OBD2 protocol they utilize. Please note that this list is not exhaustive and serves as a general guide.
| Model | Engine | Year (starting from) | OBD-2 Protocol |
|---|---|---|---|
| Toyota Auris | Diesel (125 HP) | 2007 | CAN |
| 2.2 D CAT D, Diesel (177HP) | 2008 | CAN 11bit (500kb) | |
| 2.0 D-4D, Diesel (126HP) | 2009 | CAN 11bit (500kb) | |
| 1.4 D-4D, Diesel (90HP) | 2010 | CAN 11bit (500kb) | |
| Toyota Avensis | Diesel (101 HP) | 1998 | ISO 14230-4, ISO 9141-2 |
| Diesel (109 HP) | 1999 | ||
| Gasoline (148 HP) | 2001 | ISO 9141-2 | |
| 1.8 VVTi, Gasoline (128 HP) | 2001 | ISO 14230-4, ISO 9141-2 | |
| Gasoline (128 HP) | 2002 | ISO 14230-4, ISO 9141-2 | |
| 2.0 VVTi, Gasoline (145 HP) | 2003 | ||
| 2.0 D-4D, Diesel (116HP) | 2003 | ISO 9141 | |
| 2, Gasoline (150HP) | 2004 | ISO 9141 | |
| D4D T25, Diesel (114 HP) | 2005 | ISO 9141-2 | |
| 2.4 VVT-i, Gasoline (160HP) | 2005 | ISO 9141 | |
| 2.0 D-4D, Diesel (126HP) | 2006 | KWP SLOW | |
| 2.2 DCAT, Diesel (177HP) | 2006 | KWP FAST | |
| Toyota Avensis T22 Facelift | Gasoline (128 HP) | 2000 | ISO 9141-2 |
| Toyota Avensis T25 | Diesel (114 HP) | 2003 | ISO 9141-2 |
| Gasoline (128 HP) | 2003 | ISO 9141-2 | |
| Gasoline (128 HP) | 2003 | ||
| Toyota Aygo | 1, Gasoline (68HP) | 2005 | ISO 9141 |
| , Gasoline (68 HP) | 2006 | ISO 9141-2 | |
| Gasoline (68 HP) | 2006 | ISO 9141-2 | |
| Gasoline (68 HP) | 2007 | ISO 9141-2 | |
| Gasoline (68 HP) | 2008 | ISO 9141-2 | |
| 3 cyl 1000cm3, Gasoline (60HP) | 2008 | ISO 9141 | |
| Gasoline (68 HP) | 2009 | ISO 9141-2 | |
| Gasoline (68 HP) | 2011 | ISO 9141-2 | |
| Gasoline (68 HP) | 2011 | ISO 9141-2 | |
| Toyota Aygo Cool | Gasoline (68 HP) | 2007 | ISO 9141-2 |
| Toyota Camry | 2.4, Gasoline (150HP) | 1999 | ISO 9141 |
| 2002 | ISO 14230-4, ISO 9141-2 | ||
| 2.5, Gasoline (170HP) | 2012 | CAN 11bit (500kb) | |
| Toyota Camry CE | Gasoline (135 HP) | 1997 | |
| Toyota Camry CE | Gasoline (121 HP) | 1997 | |
| Toyota Celica | 1,8 VVTI, Gasoline (207 HP) | 2000 | |
| 1.8 VVTI, Gasoline (195 HP) | 2000 | ||
| 1.8 vvti, Gasoline (143HP) | 2000 | ISO 9141 | |
| Gasoline (190 HP) | 2001 | KW 1281 | |
| Toyota Celica GT-S | 2000 | ISO 14230-4, ISO 9141-2 | |
| Toyota Corolla | 1997 | VPW J1850 | |
| 1.6 VVTi, Gasoline (110HP) | 1999 | ISO 9141 | |
| Gasoline (190 HP) | 2002 | ISO 9141-2 | |
| 1.8 VVTi, Gasoline (192HP) | 2002 | ISO 9141 | |
| 2.0 HDi, Diesel (90HP) | 2003 | ISO 9141 | |
| 1.4 D-4D, Diesel (90HP) | 2004 | CAN 11bit (500kb) | |
| 1.4, Gasoline (97HP) | 2004 | ISO 9141 | |
| 2.0 D-4D, Diesel (115HP) | 2004 | ISO 9141 | |
| 1.4, Gasoline (128 HP) | 2005 | ||
| 2.2 D-4D, Diesel (136HP) | 2006 | KWP SLOW | |
| 2.2 D4-D, Diesel (177HP) | 2006 | KWP SLOW | |
| 2.0 D-4D, Diesel (126HP) | 2011 | CAN 11bit (500kb) | |
| Toyota Corolla (European) | 2002 | ISO 14230-4, ISO 9141-2 | |
| Toyota Corolla CE | Gasoline (121 HP) | 2004 | |
| Toyota Corolla Combi | Gasoline (109 HP) | 2006 | ISO 9141-2 |
| Toyota Corolla E 11 | Diesel (89 HP) | 2001 | |
| 1.4 VVTi, Gasoline (96 HP) | 2000 | ISO 9141-2 | |
| Toyota Corolla E12(T) Combi | Gasoline (109 HP) | 2006 | ISO 9141-2 |
| Toyota Corolla Kombi E12T | (4ZZ-FE) 1,4L 97PS, Gasoline (96 HP) | 2007 | ISO 9141-2 |
| Toyota Corolla Verso | Gasoline (109 HP) | 2002 | ISO 9141-2 |
| Diesel (117 HP) | 2004 | ISO 9141-2 | |
| , Diesel (128 HP) | 2004 | – | |
| Gasoline (135 HP) | 2005 | – | |
| , Gasoline (128 HP) | 2008 | – | |
| Toyota Echo | 1.5, Gasoline (90HP) | 2003 | ISO 9141 |
| Toyota FJ Cruiser | V6 4.0, Gasoline (280HP) | 2007 | CAN 11bit (500kb) |
| Toyota forturner | Diesel (135 HP) | 2007 | |
| Toyota Hilux | 3.0 D-4D, Diesel (171HP) | 2007 | KWP FAST |
| Toyota IQ | 1L, Gasoline (67HP) | 2009 | CAN 11bit (500kb) |
| Toyota Land cruiser D4D | Diesel (219 HP) | 2004 | |
| Toyota lc120 | Diesel (164 HP) | 2004 | |
| Toyota mr2 | 1.8 VVT-i, Gasoline (142HP) | 2000 | ISO 9141 |
| Toyota MR-S | 1.8 vvti, Gasoline (143HP) | 2000 | ISO 9141 |
| Toyota Previa | Gasoline (155 HP) | 2000 | ISO 14230-4, ISO 9141-2 |
| 2.4 vvti, Gasoline (156HP) | 2000 | ISO 9141 | |
| Gasoline (155 HP) | 2002 | ISO 14230-4 | |
| Gasoline (155 HP) | 2004 | ||
| Diesel | 2002 | not compliant | |
| Gasoline (155 HP) | 2001 | ISO 14230-4, ISO 9141-2 | |
| Toyota Prius | Gasoline (105 HP) | 2006 | |
| 1.5, Gasoline (110HP) | 2006 | CAN 11bit (500kb) | |
| Toyota Prius 3 | 1.8, Hyb (136HP) | 2009 | CAN 11bit (500kb) |
| Toyota Prius HW 11 | Gasoline (72 HP) | 2001 | ISO 9141-2 |
| Toyota Prius II | Gasoline (77 HP) | 2007 | CAN |
| Toyota RAV4 | 2.0 VVT-i, Gasoline (150HP) | 2000 | ISO 9141 |
| 2001 | ISO 14230-4, ISO 9141-2 | ||
| Gasoline (148 HP) | 2002 | ISO 14230-4, ISO 9141-2 | |
| Diesel (114 HP) | 2002 | ||
| Diesel (114 HP) | 2004 | ISO 14230-4 | |
| 2.0 D-4D, Diesel (116HP) | 2004 | KWP FAST | |
| D-4D, Diesel (135HP) | 2004 | ISO 9141 | |
| 2.2 D-4D, Diesel (136HP) | 2006 | CAN 11bit (500kb) | |
| 2.2 D-4D, Diesel (177HP) | 2006 | CAN 11bit (500kb) | |
| Diesel (148 HP) | 2009 | ||
| 2.2, Diesel (150HP) | 2009 | CAN 11bit (500kb) | |
| V6, Gasoline (260HP) | 2010 | CAN 11bit (500kb) | |
| Diesel (175 HP) | 2006 | CAN | |
| Toyota Sienna | 3.3, Gasoline (220HP) | 2006 | ISO 9141 |
| Toyota Sienna LE | 1999 | ISO 14230-4, ISO 9141-2 | |
| Toyota Sol Automatik | Gasoline (85 HP) | 2001 | ISO 9141-2 |
| Toyota Solara | 1999 | ISO 14230-4, ISO 9141-2 | |
| Toyota Solara LE | 2000 | ISO 14230-4, ISO 9141-2 | |
| Toyota Tacoma | 1995 | VPW J1850 | |
| 2000 | ISO 14230-4, ISO 9141-2 | ||
| 2002 | ISO 14230-4, ISO 9141-2 | ||
| 4.0 vvti, Gasoline (236HP) | 2006 | KWP FAST | |
| Toyota Tundra | 2000 | ISO 14230-4, ISO 9141-2 | |
| 2001 | ISO 14230-4, ISO 9141-2 | ||
| 2003 | ISO 14230-4, ISO 9141-2 | ||
| 4.7, Gasoline (230HP) | 2003 | ISO 9141 | |
| Toyota Yaris | 1.0, Gasoline (68 HP) | 1999 | ISO 9141-2 |
| Gasoline (85 HP) | 2000 | ||
| 1.3, Gasoline (86HP) | 2000 | ISO 9141 | |
| 1.5 16V, Gasoline (105HP) | 2000 | ISO 9141 | |
| Gasoline (74 HP) | 2002 | ||
| 1.0 VVT-i, Gasoline (65HP) | 2002 | ISO 9141 | |
| 1.4L, Diesel (63HP) | 2003 | ISO 9141 | |
| 1.4 D-4D, Diesel (75HP) | 2003 | ISO 9141 | |
| 1.0 VVTi, Gasoline (68HP) | 2004 | ISO 9141 | |
| Gasoline (86 HP) | 2006 | ||
| 1.4 D-4D, Diesel (90HP) | 2006 | ISO 9141 | |
| Gasoline (74 HP) | 2007 | ISO 14230-4 | |
| 1.3, Gasoline (87HP) | 2009 | CAN 11bit (500kb) | |
| D4-D, Diesel (90HP) | 2010 | CAN 11bit (500kb) | |
| Toyota Yaris Verso | Gasoline (105 HP) | 2002 | ISO 9141-2 |
| Gasoline (104 HP) | 2003 | ISO 9141-2 | |
| Toyota Yaris xp9 | Gasoline (105 HP) | 2009 | |
| Lexus IS 200 Automat | Gasoline (156 HP) | 2003 | ISO 14230-4 |
| Lexus IS200 | 2, Gasoline (155HP) | 1999 | ISO 9141 |
| Lexus IS300 | 3, Gasoline (210HP) | 2002 | ISO 9141 |
| Lexus Rx400h | 3.3 V6, Hyb (211HP) | 2007 | CAN 11bit (500kb) |
| 2.6, Hyd (270HP) | 2008 | CAN 11bit (500kb) | |
| Lexus Rx450h | V6, Gasoline (295HP) | 2011 | CAN 11bit (500kb) |
Note: This compatibility list is based on available data and may not be 100% complete. Always verify your vehicle’s specific OBD2 protocol.
Alt text: Example section of Toyota OBD2 compatibility list showing models, years, and supported OBD2 protocols.
Understanding Toyota OBD2 Communication Protocols
Toyota vehicles utilize a range of OBD2 communication protocols, which have evolved over time. Here’s a summary of the common protocols you might encounter:
- ISO 9141 & ISO 14230 (KWP2000): These are older ISO (International Organization for Standardization) protocols used in many Toyota models from the late 1990s to the mid-2000s. They are serial communication protocols operating on the K-line (Pin 7) and L-line (Pin 15) in some implementations.
- J1850 VPW & J1850 PWM: These SAE (Society of Automotive Engineers) protocols were used in some early OBD2 implementations, particularly in North American models. Toyota vehicles, especially in earlier years, might utilize J1850 VPW. These protocols use Pin 2 (J1850 Bus+) and Pin 10 (J1850 Bus-).
- KWP (Keyword Protocol) SLOW & FAST: KWP2000 (ISO 14230) protocols can be implemented in different speeds. “KWP SLOW” and “KWP FAST” refer to the data transmission rate. Some Toyota models in the mid-2000s might use these variations.
- CAN (Controller Area Network): CAN bus is the modern, high-speed protocol widely adopted in vehicles from the mid-2000s onwards. Toyota increasingly uses CAN bus (specifically CAN 11bit 500kb as noted in the compatibility list) for its OBD2 communication in newer models. CAN communication utilizes Pin 6 (CAN High) and Pin 14 (CAN Low).
General Timeline of Toyota OBD2 Protocol Usage:
- 1996: Primarily J1850-VPW.
- 1997-1999: J1850-VPW or ISO 9141.
- 1999-2003: Predominantly ISO 9141.
- 2004-2006: Transition period with ISO 9141 or CAN protocols being used.
- 2007 and later: Primarily CAN bus for most models.
This timeline is a generalization, and specific model years and regions can vary. Always consult your vehicle’s documentation or perform a vehicle-specific check to confirm the OBD2 protocol.
Utilizing Your Toyota OBD2 Port for Diagnostics
The OBD2 port in your Toyota is your gateway to diagnosing vehicle issues, monitoring performance, and accessing valuable data. You can use an OBD2 scanner tool to connect to this port and:
- Read Diagnostic Trouble Codes (DTCs): Identify the source of problems indicated by the check engine light or other warning lights.
- Clear DTCs: Reset the check engine light after addressing the underlying issue.
- View Live Data: Monitor real-time parameters like engine temperature, RPM, speed, sensor readings, and more.
- Perform Emissions Testing: Check readiness monitors for smog tests.
- Access Vehicle Information: Retrieve VIN (Vehicle Identification Number) and other vehicle-specific data.
By understanding the Toyota OBD2 diagram, compatibility, and protocols, you are better equipped to diagnose and maintain your vehicle effectively. Whether you are a DIY enthusiast or a professional technician, this knowledge is invaluable for working with Toyota vehicles.
Further Resources:
- 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
These resources provide further detail on OBD2 cable configurations and can be helpful if you are building your own diagnostic setup or need to understand the physical wiring of OBD2 systems.
