CAN COMMUNICATION SYSTEM TERMINALS OF ECU

Note


  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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  • Turn the engine switch off before inspecting CAN bus lines for a ground short.

  • Turn the engine switch off before measuring the resistances between CAN main bus lines and between CAN branch lines.

  • Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • This section describes the standard values for all CAN related components.

Tech Tips


  • The systems (ECUs and sensors) that use CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed to the vehicle.

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  • Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.


  1. NO. 1 CAN JUNCTION CONNECTOR (for LHD)


    1. Check the No. 1 CAN junction connector.


      1. Connection diagram

        B003WGCC24
        *a

        Front view of wire harness connector

        (to No. 1 CAN Junction Connector)

        		 *b to No. 2 CAN Junction Connector
        *c to Combination Meter Assembly *d

        to Engine Stop and Start ECU

        (w/ Stop and Start System)
        *e to Central Gateway ECU (Network Gateway ECU) *f to Air Conditioning Amplifier Assembly
        *g

        to Stereo Component Equalizer Assembly

        (w/ ASC System)

        		 *h to Certification ECU (Smart Key ECU Assembly)
        *i to Power Steering ECU Assembly - -

      2. Check the connection diagram of the components which are connected to the No. 1 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K109-1 (CANH) L

        No. 2 CAN junction connector

        (for Bus 2)
        K109-11 (CANL) B
        K109-2 (CANH) LG

        Combination meter assembly

        (for Bus 2)
        K109-12 (CANL) B
        K109-3 (CANH) GR

        Engine stop and start ECU*1

        (for Bus 2)
        K109-13 (CANL) B
        K109-4 (CANH) BE

        Central gateway ECU (network gateway ECU)

        (for Bus 2)
        K109-14 (CANL) B
        K109-5 (CANH) P

        Air conditioning amplifier assembly

        (for Bus 2)
        K109-15 (CANL) B
        K109-6 (CANH) V

        Stereo component equalizer assembly*2

        (for Bus 2)
        K109-16 (CANL) B
        K109-7 (CANH) W

        Certification ECU (smart key ECU assembly)

        (for Bus 2)
        K109-17 (CANL) B
        K109-9 (CANH) G

        Power steering ECU assembly

        (for Bus 2)
        K109-19 (CANL) B

        • *1: w/ Stop and Start System

        • *2: w/ ASC System

  2. NO. 2 CAN JUNCTION CONNECTOR (for LHD)


    1. Check the No. 2 CAN junction connector.


      1. Connection diagram

        B003WGCC05
        *a

        Front view of wire harness connector

        (to No. 2 CAN Junction Connector)

        		 *b to No. 1 CAN Junction Connector
        *c to Main Body ECU (Multiplex Network Body ECU) *d to ECM
        *e to Airbag Sensor Assembly *f to Yaw Rate Sensor
        *g to Steering Sensor *h to Skid Control ECU (Brake Actuator Assembly)

      2. Check the connection diagram of the components which are connected to the No. 2 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K110-1 (CANH) L

        No. 1 CAN junction connector

        (for Bus 2)
        K110-11 (CANL) B
        K110-2 (CANH) Y

        Main body ECU (multiplex network body ECU)

        (for Bus 2)
        K110-12 (CANL) B
        K110-3 (CANH) R

        ECM

        (for Bus 2)
        K110-13 (CANL) B
        K110-5 (CANH) BE

        Airbag sensor assembly

        (for Bus 2)
        K110-15 (CANL) B
        K110-6 (CANH) G

        Yaw rate sensor

        (for Bus 2)
        K110-16 (CANL) B
        K110-9 (CANH) P

        Steering sensor

        (for Bus 2)
        K110-19 (CANL) B
        K110-10 (CANH) SB

        Skid control ECU (brake actuator assembly)

        (for Bus 2)
        K110-20 (CANL) B

  3. NO. 3 CAN JUNCTION CONNECTOR (for LHD)


    1. Check the No. 3 CAN junction connector.


      1. Connection diagram

        B003VCMC11
        *a

        Front view of wire harness connector

        (to No. 3 CAN Junction Connector)

        		 *b to No. 14 Junction Connector
        *c

        to Multiplex Tilt and Telescopic ECU

        (w/ Power Tilt and Power Telescopic System)

        		 *d

        to Outer Mirror Control ECU Assembly (for Front Passenger Side)

        (w/ Automatic Retractable Mirror)
        *e to No. 1 CAN Junction Terminal - -

      2. Check the connection diagram of the components which are connected to the No. 3 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K111-7 (CANH) LG

        No. 14 junction connector

        (for Sub bus 1)
        K111-18 (CANL) B
        K111-8 (CANH) G

        Multiplex tilt and telescopic ECU*1

        (for Sub bus 1)
        K111-19 (CANL) B
        K111-10 (CANH) W

        Outer mirror control ECU assembly (for front passenger side)*2

        (for Sub bus 1)
        K111-21 (CANL) B
        K111-11 (CANH) P

        No. 1 CAN junction terminal

        (for Sub bus 1)
        K111-22 (CANL) B

        • *1: w/ Power Tilt and Power Telescopic System

        • *2: w/ Automatic Retractable Mirror

  4. NO. 7 CAN JUNCTION CONNECTOR (for LHD)


    1. Check the No. 7 CAN junction connector.


      1. Connection diagram

        B003VCMC13
        *a

        Front view of wire harness connector

        (to No. 7 CAN Junction Connector)

        		 *b to Central Gateway ECU (Network Gateway ECU)
        *c

        to Telematics Transceiver

        (w/ Telematics Transceiver)

        		 *d

        to Radio Receiver Assembly

        (w/ Navigation System or Audio and Visual System)
        *e to Option Connector (Bus Buffer ECU) - -

      2. Check the connection diagram of the components which are connected to the No. 7 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K115-7 (CANH) R

        Central gateway ECU (network gateway ECU)

        (for Bus 3)
        K115-18 (CANL) B
        K115-8 (CANH) LG

        Telematics transceiver*1

        (for Bus 3)
        K115-19 (CANL) B
        K115-9 (CANH) BE

        Radio receiver assembly*2

        (for Bus 3)
        K115-20 (CANL) B
        K115-10 (CANH) SB

        Option connector (bus buffer ECU)

        (for Bus 3)
        K115-21 (CANL) B
        K115-11 (CANH) V

        Central gateway ECU (network gateway ECU)

        (for Bus 3)
        K115-22 (CANL) B

        • *1: w/ Telematics Transceiver

        • *2: w/ Navigation System or Audio and Visual System

  5. NO. 9 CAN JUNCTION CONNECTOR (for LHD)


    1. Check the No. 9 CAN junction connector.

      Tech Tips

      Connectors that connect to the CAN junction connector can be distinguished by the color of their CAN bus lines. When the connectors have been disconnected from the CAN junction connector, reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wire harnesses, and to make future maintenance easier.


      1. Connection diagram

        B003U6VC02
        *a

        Component with harness connected

        (No. 9 CAN Junction Connector)

        		 *b to Central Gateway ECU (Network Gateway ECU)
        *c to No. 10 CAN Junction Connector *d

        to Absorber Control ECU

        (w/ AVS System)

      2. Check the connection diagram of the components which are connected to the No. 9 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K142-1 (CANH) GR

        Central gateway ECU (network gateway ECU)

        (for Bus 5)
        K142-2 (CANL) B
        K143-1 (CANH) LG

        No. 10 CAN junction connector

        (for Bus 5)
        K143-2 (CANL) B
        K144-1 (CANH) SB

        Absorber control ECU*

        (for Bus 5)
        K144-2 (CANL) B

        • *: w/ AVS System

  6. NO. 10 CAN JUNCTION CONNECTOR (for LHD)


    1. Check the No. 10 CAN junction connector.

      Tech Tips

      Connectors that connect to the CAN junction connector can be distinguished by the color of their CAN bus lines. When the connectors have been disconnected from the CAN junction connector, reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wire harnesses, and to make future maintenance easier.


      1. Connection diagram

        B003VCNC02
        *a

        Component with harness connected

        (No. 10 CAN Junction Connector)

        		 *b to No. 9 CAN Junction Connector
        *c

        to Forward Recognition Camera

        (w/ Lexus Safety System +)

        		 *d

        to Millimeter Wave Radar Sensor Assembly

        (w/ Lexus Safety System +)
        *e

        to Driving Support ECU Assembly

        (w/ Lexus Safety System +)

        		 *f

        to Clearance Warning ECU Assembly

        (w/ LEXUS Parking Assist-sensor System)
        *g to No. 13 CAN Junction Connector - -

      2. Check the connection diagram of the components which are connected to the No. 10 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K146-1 (CANH) LG

        No. 9 CAN junction connector

        (for Bus 5)
        K146-2 (CANL) B
        K147-1 (CANH) R

        Forward recognition camera*1

        (for Bus 5)
        K147-2 (CANL) B
        K148-1 (CANH) L

        Millimeter wave radar sensor assembly*1

        (for Bus 5)
        K148-2 (CANL) B
        K149-1 (CANH) G

        Driving support ECU assembly*1

        (for Bus 5)
        K149-2 (CANL) B
        K150-1 (CANH) P

        Clearance warning ECU assembly*2

        (for Bus 5)
        K150-2 (CANL) B
        K151-1 (CANH) BE

        No. 13 CAN junction connector

        (for Bus 5)
        K151-2 (CANL) B

        • *1: w/ Lexus Safety System +

        • *2: w/ LEXUS Parking Assist-sensor System

  7. NO. 12 CAN JUNCTION CONNECTOR (for LHD)


    1. Check the No. 12 CAN junction connector.


      1. Connection diagram

        B003VCMC12
        *a

        Front view of wire harness connector

        (to No. 12 CAN Junction Connector)

        		 *b to No. 14 Junction Connector
        *c to Main Body ECU (Multiplex Network Body ECU) *d

        to Outer Mirror Control ECU Assembly (for Driver Side)

        (w/ Automatic Retractable Mirror)
        *e to No. 1 Headlight ECU Sub-assembly LH - -

      2. Check the connection diagram of the components which are connected to the No. 12 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K152-8 (CANH) L

        No. 14 junction connector

        (for Sub bus 1)
        K152-19 (CANL) B
        K152-9 (CANH) P

        Main body ECU (multiplex network body ECU)

        (for Sub bus 1)
        K152-20 (CANL) B
        K152-10 (CANH) W

        Outer mirror control ECU assembly (for driver side)*

        (for Sub bus 1)
        K152-21 (CANL) B
        K152-11 (CANH) V

        No. 1 headlight ECU sub-assembly LH

        (for Sub bus 1)
        K152-22 (CANL) B

        • *: w/ Automatic Retractable Mirror

  8. NO. 13 CAN JUNCTION CONNECTOR (for LHD)


    1. Check the No. 13 CAN junction connector.


      1. Connection diagram

        B003VRFC02
        *a

        Front view of wire harness connector

        (to No. 13 CAN Junction Connector)

        		 *b to No. 10 CAN Junction Connector
        *c to No. 2 CAN Junction Terminal *d

        to Blind Spot Monitor Sensor LH

        (w/ Blind Spot Monitor System)

      2. Check the connection diagram of the components which are connected to the No. 13 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        Q68-3 (CANH) BE

        No. 10 CAN junction connector

        (for Bus 5)
        Q68-9 (CANL) B
        Q68-4 (CANH) GR

        No. 2 CAN junction terminal

        (for Bus 5)
        Q68-10 (CANL) B
        Q68-5 (CANH) R

        Blind spot monitor sensor LH*

        (for Bus 5)
        Q68-11 (CANL) B

        • *: w/ Blind Spot Monitor System

  9. NO. 14 JUNCTION CONNECTOR (for LHD)


    1. Check the No. 14 junction connector.


      1. Connection diagram

        B003VCMC14
        *a

        Front view of wire harness connector

        (to No. 14 Junction Connector)

        		 *b

        to Front Power Seat Switch LH

        (w/ Seat Position Memory System)
        *c to No. 3 CAN Junction Connector *d to No. 12 CAN Junction Connector
        *e

        to Rear Television Camera Assembly

        (w/ Parking Assist Monitor System without Parallel Parking Assist Function)

        		 - -

      2. Check the connection diagram of the components which are connected to the No. 14 junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        Q57-8 (CANH) R

        Front power seat switch LH*1

        (for Sub bus 1)
        Q57-19 (CANL) B
        Q57-9 (CANH) LG

        No. 3 CAN junction connector

        (for Sub bus 1)
        Q57-20 (CANL) B
        Q57-10 (CANH) L

        No. 12 CAN junction connector

        (for Sub bus 1)
        Q57-21 (CANL) B
        Q57-11 (CANH) W

        Rear television camera assembly*2

        (for Sub bus 1)
        Q57-22 (CANL) B

        • *1: w/ Seat Position Memory System

        • *2: w/ Parking Assist Monitor System without Parallel Parking Assist Function

  10. NO. 1 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 1 CAN junction connector.


      1. Connection diagram

        B003WGCC06
        *a

        Front view of wire harness connector

        (to No. 1 CAN Junction Connector)

        		 *b to No. 2 CAN Junction Connector
        *c to Combination Meter Assembly *d

        to Engine Stop and Start ECU

        (w/ Stop and Start System)
        *e to Airbag Sensor Assembly *f to Yaw Rate Sensor
        *g to Skid Control ECU (Brake Actuator Assembly) *h to Steering Sensor

      2. Check the connection diagram of the components which are connected to the No. 1 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K109-1 (CANH) L

        No. 2 CAN junction connector

        (for Bus 2)
        K109-11 (CANL) B
        K109-2 (CANH) LG

        Combination meter assembly

        (for Bus 2)
        K109-12 (CANL) B
        K109-3 (CANH) GR

        Engine stop and start ECU*

        (for Bus 2)
        K109-13 (CANL) B
        K109-4 (CANH) BE

        Airbag sensor assembly

        (for Bus 2)
        K109-14 (CANL) B
        K109-5 (CANH) G

        Yaw rate sensor

        (for Bus 2)
        K109-15 (CANL) B
        K109-6 (CANH) SB

        Skid control ECU (brake actuator assembly)

        (for Bus 2)
        K109-16 (CANL) B
        K109-7 (CANH) P

        Steering sensor

        (for Bus 2)
        K109-17 (CANL) B

        • *: w/ Stop and Start System

  11. NO. 2 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 2 CAN junction connector.


      1. Connection diagram

        B003WGCC25
        *a

        Front view of wire harness connector

        (to No. 2 CAN Junction Connector)

        		 *b to No. 1 CAN Junction Connector
        *c to Main Body ECU (Multiplex Network Body ECU) *d to ECM
        *e to Central Gateway ECU (Network Gateway ECU) *f to Air Conditioning Amplifier Assembly
        *g

        to Front Steering Control ECU

        (w/ VGRS System)

        		 *h to Certification ECU (Smart Key ECU Assembly)
        *i

        to Stereo Component Equalizer Assembly

        (w/ ASC System)

        		 *j to Power Steering ECU Assembly

      2. Check the connection diagram of the components which are connected to the No. 2 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K110-1 (CANH) L

        No. 1 CAN junction connector

        (for Bus 2)
        K110-11 (CANL) B
        K110-2 (CANH) Y

        Main body ECU (multiplex network body ECU)

        (for Bus 2)
        K110-12 (CANL) B
        K110-3 (CANH) R

        ECM

        (for Bus 2)
        K110-13 (CANL) B
        K110-5 (CANH) BE

        Central gateway ECU (network gateway ECU)

        (for Bus 2)
        K110-15 (CANL) B
        K110-6 (CANH) P

        Air conditioning amplifier assembly

        (for Bus 2)
        K110-16 (CANL) B
        K110-7 (CANH) GR

        Front steering control ECU*1

        (for Bus 2)
        K110-17 (CANL) B
        K110-8 (CANH) W

        Certification ECU (smart key ECU assembly)

        (for Bus 2)
        K110-18 (CANL) B
        K110-9 (CANH) V

        Stereo component equalizer assembly*2

        (for Bus 2)
        K110-19 (CANL) B
        K110-10 (CANH) G

        Power steering ECU assembly

        (for Bus 2)
        K110-20 (CANL) B

        • *1: w/ VGRS System

        • *2: w/ ASC System

  12. NO. 4 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 4 CAN junction connector.


      1. Connection diagram

        B003VCMC15
        *a

        Front view of wire harness connector

        (to No. 4 CAN Junction Connector)

        		 *b to No. 14 Junction Connector
        *c

        to Multiplex Tilt and Telescopic ECU

        (w/ Power Tilt and Power Telescopic System)

        		 *d

        to Front Power Seat Switch RH

        (w/ Seat Position Memory System)
        *e

        to Outer Mirror Control ECU Assembly (for Driver Side)

        (w/ Automatic Retractable Mirror)

        		 *f to No. 1 CAN Junction Terminal

      2. Check the connection diagram of the components which are connected to the No. 4 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K112-7 (CANH) LG

        No. 14 junction connector

        (for Sub bus 1)
        K112-18 (CANL) B
        K112-8 (CANH) G

        Multiplex tilt and telescopic ECU*1

        (for Sub bus 1)
        K112-19 (CANL) B
        K112-9 (CANH) R

        Front power seat switch RH*2

        (for Sub bus 1)
        K112-20 (CANL) B
        K112-10 (CANH) W

        Outer mirror control ECU assembly (for driver side)*3

        (for Sub bus 1)
        K112-21 (CANL) B
        K112-11 (CANH) P

        No. 1 CAN junction terminal

        (for Sub bus 1)
        K112-22 (CANL) B

        • *1: w/ Power Tilt and Power Telescopic System

        • *2: w/ Seat Position Memory System

        • *3: w/ Automatic Retractable Mirror

  13. NO. 8 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 8 CAN junction connector.


      1. Connection diagram

        B003VCMC16
        *a

        Front view of wire harness connector

        (to No. 8 CAN Junction Connector)

        		 *b

        to Front Steering Control ECU

        (w/ VGRS System)
        *c

        to Skid Control ECU (Brake Actuator Assembly)

        (w/ VGRS System)

        		 *d

        to No. 14 Junction Connector

        (w/ VGRS System)
        *e

        to Absorber Control ECU

        (w/ VGRS System)

        		 *f

        to Central Gateway ECU (Network Gateway ECU)

        (w/ VGRS System)
        *g to Central Gateway ECU (Network Gateway ECU) *h

        to Radio Receiver Assembly

        (w/ Navigation System or Audio and Visual System)

      2. Check the connection diagram of the components which are connected to the No. 8 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K116-1 (CANH) R

        Front steering control ECU*1

        (for Bus 4)
        K116-12 (CANL) B
        K116-3 (CANH) LG

        Skid control ECU (brake actuator assembly)*1

        (for Bus 4)
        K116-14 (CANL) B
        K116-4 (CANH) P

        No. 14 junction connector*1

        (for Bus 4)
        K116-15 (CANL) B
        K116-5 (CANH) G

        Absorber control ECU*1

        (for Bus 4)
        K116-16 (CANL) B
        K116-6 (CANH) W

        Central gateway ECU (network gateway ECU)*1

        (for Bus 4)
        K116-17 (CANL) B
        K116-7 (CANH) R

        Central gateway ECU (network gateway ECU)

        (for Bus 3)
        K116-18 (CANL) B
        K116-9 (CANH) BE

        Radio receiver assembly*2

        (for Bus 3)
        K116-20 (CANL) B
        K116-11 (CANH) V

        Central gateway ECU (network gateway ECU)

        (for Bus 3)
        K116-22 (CANL) B

        • *1: w/ VGRS System

        • *2: w/ Navigation System or Audio and Visual System

  14. NO. 9 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 9 CAN junction connector.

      Tech Tips

      Connectors that connect to the CAN junction connector can be distinguished by the color of their CAN bus lines. When the connectors have been disconnected from the CAN junction connector, reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wire harnesses, and to make future maintenance easier.


      1. Connection diagram

        B003UT5C01
        *a

        Component with harness connected

        (No. 9 CAN Junction Connector)

        		 *b to Central Gateway ECU (Network Gateway ECU)
        *c to No. 10 CAN Junction Connector *d

        to Absorber Control ECU

        (w/ AVS System)
        *e

        to Driving Support ECU Assembly

        (w/ Lexus Safety System +)

        		 - -

      2. Check the connection diagram of the components which are connected to the No. 9 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K142-1 (CANH) GR

        Central gateway ECU (network gateway ECU)

        (for Bus 5)
        K142-2 (CANL) B
        K143-1 (CANH) LG

        No. 10 CAN junction connector

        (for Bus 5)
        K143-2 (CANL) B
        K144-1 (CANH) SB

        Absorber control ECU*1

        (for Bus 5)
        K144-2 (CANL) B
        K157-1 (CANH) G

        to Driving Support ECU Assembly*2

        (for Bus 5)
        K157-2 (CANL) B

        • *1: w/ AVS System

        • *2: w/ Lexus Safety System +

  15. NO. 10 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 10 CAN junction connector.

      Tech Tips

      Connectors that connect to the CAN junction connector can be distinguished by the color of their CAN bus lines. When the connectors have been disconnected from the CAN junction connector, reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wire harnesses, and to make future maintenance easier.


      1. Connection diagram

        B003V9XC01
        *a

        Component with harness connected

        (No. 10 CAN Junction Connector)

        		 *b to No. 9 CAN Junction Connector
        *c

        to Forward Recognition Camera

        (w/ Lexus Safety System +)

        		 *d

        to Millimeter Wave Radar Sensor Assembly

        (w/ Lexus Safety System +)
        *e

        to Clearance Warning ECU Assembly

        (w/ LEXUS Parking Assist-sensor System)

        		 *f to No. 13 CAN Junction Connector

      2. Check the connection diagram of the components which are connected to the No. 10 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K146-1 (CANH) LG

        No. 9 CAN junction connector

        (for Bus 5)
        K146-2 (CANL) B
        K147-1 (CANH) R

        Forward recognition camera*1

        (for Bus 5)
        K147-2 (CANL) B
        K148-1 (CANH) L

        Millimeter wave radar sensor assembly*1

        (for Bus 5)
        K148-2 (CANL) B
        K150-1 (CANH) P

        Clearance warning ECU assembly*2

        (for Bus 5)
        K150-2 (CANL) B
        K151-1 (CANH) BE

        No. 13 CAN junction connector

        (for Bus 5)
        K151-2 (CANL) B

        • *1: w/ Lexus Safety System +

        • *2: w/ LEXUS Parking Assist-sensor System

  16. NO. 12 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 12 CAN junction connector.


      1. Connection diagram

        B003VCMC17
        *a

        Front view of wire harness connector

        (to No. 12 CAN Junction Connector)

        		 *b to No. 14 Junction Connector
        *c to Main Body ECU (Multiplex Network Body ECU) *d

        to Outer Mirror Control ECU Assembly (for Front Passenger Side)

        (w/ Automatic Retractable Mirror)
        *e to No. 1 Headlight ECU Sub-assembly LH - -

      2. Check the connection diagram of the components which are connected to the No. 12 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K152-8 (CANH) L

        No. 14 junction connector

        (for Sub bus 1)
        K152-19 (CANL) B
        K152-9 (CANH) P

        Main body ECU (multiplex network body ECU)

        (for Sub bus 1)
        K152-20 (CANL) B
        K152-10 (CANH) W

        Outer mirror control ECU assembly (for front passenger side)*

        (for Sub bus 1)
        K152-21 (CANL) B
        K152-11 (CANH) V

        No. 1 headlight ECU sub-assembly LH

        (for Sub bus 1)
        K152-22 (CANL) B

        • *: w/ Automatic Retractable Mirror

  17. NO. 13 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 13 CAN junction connector.


      1. Connection diagram

        B003VRFC02
        *a

        Front view of wire harness connector

        (to No. 13 CAN Junction Connector)

        		 *b to No. 10 CAN Junction Connector
        *c to No. 2 CAN Junction Terminal *d

        to Blind Spot Monitor Sensor LH

        (w/ Blind Spot Monitor System)

      2. Check the connection diagram of the components which are connected to the No. 13 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        Q68-3 (CANH) BE

        No. 10 CAN junction connector

        (for Bus 5)
        Q68-9 (CANL) B
        Q68-4 (CANH) GR

        No. 2 CAN junction terminal

        (for Bus 5)
        Q68-10 (CANL) B
        Q68-5 (CANH) R

        Blind spot monitor sensor LH*

        (for Bus 5)
        Q68-11 (CANL) B

        • *: w/ Blind Spot Monitor System

  18. NO. 14 JUNCTION CONNECTOR (for RHD)


    1. Check the No. 14 junction connector.


      1. Connection diagram

        B003VCMC18
        *a

        Front view of wire harness connector

        (to No. 14 Junction Connector)

        		 *b

        to No. 8 CAN Junction Connector

        (w/ VGRS System)
        *c

        to Power Steering ECU Assembly

        (w/ VGRS System)

        		 *d to No. 4 CAN Junction Connector
        *e to No. 12 CAN Junction Connector *f

        to Rear Television Camera Assembly

        (w/ Parking Assist Monitor System without Parallel Parking Assist Function)

      2. Check the connection diagram of the components which are connected to the No. 14 junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        Q57-5 (CANH) P

        No. 8 CAN junction connector*1

        (for Bus 4)
        Q57-16 (CANL) B
        Q57-6 (CANH) W

        Power steering ECU assembly*1

        (for Bus 4)
        Q57-17 (CANL) B
        Q57-9 (CANH) LG

        No. 4 CAN junction connector

        (for Sub bus 1)
        Q57-20 (CANL) B
        Q57-10 (CANH) L

        No. 12 CAN junction connector

        (for Sub bus 1)
        Q57-21 (CANL) B
        Q57-11 (CANH) W

        Rear television camera assembly*2

        (for Sub bus 1)
        Q57-22 (CANL) B

        • *1: w/ VGRS System

        • *2: w/ Parking Assist Monitor System without Parallel Parking Assist Function

  19. NO. 1 CAN JUNCTION TERMINAL (for LHD)


    1. Check the No. 1 CAN junction terminal.


      1. Connection diagram

        B003SWNC06
        *a

        Front view of wire harness connector

        (to No. 1 CAN Junction Terminal)

        		 *b

        to No. 3 CAN Junction Connector

        (for Sub Bus 1)

      2. Check the connection diagram of the components which are connected to the No. 1 CAN junction terminal.

        Terminal No. (Symbol) Wiring Color Connected to
        K106-3 (CANH) P

        No. 3 CAN junction connector

        (for Sub bus 1)
        K106-2 (CANL) B

  20. NO. 1 CAN JUNCTION TERMINAL (for RHD)


    1. Check the No. 1 CAN junction terminal.


      1. Connection diagram

        B003SWNC60
        *a

        Front view of wire harness connector

        (to No. 1 CAN Junction Terminal)

        		 *b

        to No. 4 CAN Junction Connector

        (for Sub Bus 1)

      2. Check the connection diagram of the components which are connected to the No. 1 CAN junction terminal.

        Terminal No. (Symbol) Wiring Color Connected to
        K106-3 (CANH) P

        No. 4 CAN junction connector

        (for Sub bus 1)
        K106-2 (CANL) B

  21. NO. 2 CAN JUNCTION TERMINAL


    1. Check the No. 2 CAN junction terminal.


      1. Connection diagram

        B003SWNC07
        *a

        Front view of wire harness connector

        (to No. 2 CAN Junction Terminal)

        		 *b

        to No. 13 CAN Junction Connector

        (for Bus 5)

      2. Check the connection diagram of the components which are connected to the No. 2 CAN junction terminal.

        Terminal No. (Symbol) Wiring Color Connected to
        K107-3 (CANH) GR

        No. 13 CAN junction connector

        (for Bus 5)
        K107-2 (CANL) B

  22. DLC3


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Measure the resistance according to the value(s) in the table below.

      B003TBBC07
      *1 DLC3 - -

    3. CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

      B003THRC36
      4. *a

      Component without harness connected

      (Central Gateway ECU (Network Gateway ECU))

      		 - -

  1. Disconnect the cable from the negative (-) battery terminal.

  2. Disconnect the K141 central gateway ECU (network gateway ECU) connector.

  3. Measure the resistance according to the value(s) in the table below.

    B003T5CC10
    *a

    Front view of wire harness connector

    (to Central Gateway ECU (Network Gateway ECU))

    		 - -

  4. ECM (for 2GR-FKS)

    Refer to Terminals of ECU.

    Click here


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the A108 ECM connector.

      B003WUOC88
    5. *a

    Front view of wire harness connector

    (to ECM)

    		 - -

  • Measure the resistance according to the value(s) in the table below.

  • ECM (for 8AR-FTS)

    Refer to Terminals of ECU.



    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the A91 and F78 ECM connectors.

      B003WUOC46
    • *a

    Front view of wire harness connector

    (to ECM)

    		 - -

  • Measure the resistance according to the value(s) in the table below.

  • COMBINATION METER ASSEMBLY

    Refer to Terminals of ECU.

    Click here


    1. Disconnect the cable from the negative (-) battery terminal.

    2. B003UN8C10
    • *a

    Front view of wire harness connector

    (to Combination Meter Assembly)

    Disconnect the K3 combination meter assembly connector.

  • Measure the resistance according to the value(s) in the table below.

  • MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Refer to Terminals of ECU.

    Click here


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the K1 and K2 main body ECU (multiplex network body ECU) connectors.

      B003WIYC05
    • *1 DLC3 - -
    *a

    Front view of wire harness connector

    (to Main Body ECU (Multiplex Network Body ECU))

    		 - -

  • Measure the resistance according to the value(s) in the table below.

  • SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

    Refer to Terminals of ECU.

    Click here


    1. Disconnect the cable from the negative (-) battery terminal.

    2. B003TFZC05
    • *a

    Front view of wire harness connector

    (to Skid Control ECU (Brake Actuator Assembly))

    Disconnect the A105 skid control ECU (brake actuator assembly) connector.

  • Measure the resistance according to the value(s) in the table below.

  • STEERING SENSOR


    1. Disconnect the cable from the negative (-) battery terminal.

    2. B003VJGC06
    • *A w/o VGRS System
    *B w/ VGRS System
    *a

    Front view of wire harness connector

    (to Steering Sensor)

    Disconnect the K29*1 or K30*2 steering sensor connector.


  • Measure the resistance according to the value(s) in the table below.

  • YAW RATE SENSOR

    B003U5AC02
    • *a

    Component without harness connected

    (Yaw Rate Sensor)

    		 - -

    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the K85 yaw rate sensor connector.

      B003SUQC06
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Yaw Rate Sensor)

      		 - -

    3. Measure the resistance according to the value(s) in the table below.

    4. POWER STEERING ECU ASSEMBLY

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003U8OC25
      5. *a

      Front view of wire harness connector

      (to Power Steering ECU Assembly)

      Disconnect the A19 power steering ECU assembly connector.

    5. Measure the resistance according to the value(s) in the table below.

    6. AIRBAG SENSOR ASSEMBLY

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the K51 airbag sensor assembly connector.

        B003X1HC11
      7. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Airbag Sensor Assembly)

      		 - -

    7. Measure the resistance according to the value(s) in the table below.

    8. CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003V3KC11
      9. *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the K6 certification ECU (smart key ECU assembly) connector.

    9. Measure the resistance according to the value(s) in the table below.

    10. RADIO RECEIVER ASSEMBLY (w/ Navigation System)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003V3ZC19
      11. *a

      Front view of wire harness connector

      (to Radio Receiver Assembly)

      Disconnect the K58 radio receiver assembly connector.

    11. Measure the resistance according to the value(s) in the table below.


      • *1: w/o Stop and Start System

      • *2: w/ Stop and Start System

    12. RADIO RECEIVER ASSEMBLY (w/ Audio and Visual System with Parallel Parking Assist Function)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003V3ZC19
      13. *a

      Front view of wire harness connector

      (to Radio Receiver Assembly)

      Disconnect the K58 radio receiver assembly connector.

    13. Measure the resistance according to the value(s) in the table below.

    14. RADIO RECEIVER ASSEMBLY (w/ Audio and Visual System w/o Parallel Parking Assist Function)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the K70 and K72 radio receiver assembly connectors.

        B003TLXC16
      15. *a

      Front view of wire harness connector

      (to Radio Receiver Assembly)

      		 - -

    15. Measure the resistance according to the value(s) in the table below.


      • *1: w/o Stop and Start System

      • *2: w/ Stop and Start System

    16. AIR CONDITIONING AMPLIFIER ASSEMBLY

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the K10 and K11 air conditioning amplifier assembly connectors.

        B003TURC01
      17. *a

      Front view of wire harness connector

      (to Air Conditioning Amplifier Assembly)

      		 - -

    17. Measure the resistance according to the value(s) in the table below.

    18. TELEMATICS TRANSCEIVER (w/ Telematics Transceiver)

      Refer to Terminals of ECU.



      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003UZRC02
      19. *a

      Front view of wire harness connector

      (to Telematics Transceiver)

      Disconnect the K66 telematics transceiver connector.

    19. Measure the resistance according to the value(s) in the table below.

    20. NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the r1 No. 1 headlight ECU sub-assembly LH connector.

        B003SUXC09
      21. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 1 Headlight ECU Sub-assembly LH)

      		 - -

    21. Measure the resistance according to the value(s) in the table below.

    22. OUTER MIRROR CONTROL ECU ASSEMBLY (for Driver Side w/ Automatic Retractable Mirror)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003WQUC22
      23. *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (for Driver Side))

      Disconnect the N24 or N9 outer mirror control ECU assembly (for driver side) connector.

    23. Measure the resistance according to the value(s) in the table below.

    24. OUTER MIRROR CONTROL ECU ASSEMBLY (for Front Passenger Side w/ Automatic Retractable Mirror)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003WQUC21
      25. *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Outer Mirror Control ECU Assembly (for Front Passenger Side))

      Disconnect the N9 or N24 outer mirror control ECU assembly (for front passenger side) connector.

    25. Measure the resistance according to the value(s) in the table below.

    26. FRONT POWER SEAT SWITCH LH (for LHD with Seat Position Memory System)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the b11 and b12 front power seat switch LH connectors.

        B003V9YC06
      27. *a

      Front view of wire harness connector

      (to Front Power Seat Switch LH)

      		 - -

    27. Measure the resistance according to the value(s) in the table below.

    28. FRONT POWER SEAT SWITCH RH (for RHD with Seat Position Memory System)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the a6 and a7 front power seat switch RH connectors.

        B003V9YC07
      29. *a

      Front view of wire harness connector

      (to Front Power Seat Switch RH)

      		 - -

    29. Measure the resistance according to the value(s) in the table below.

    30. MULTIPLEX TILT AND TELESCOPIC ECU (w/ Power Tilt and Power Telescopic System)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003WIFC05
      31. *a

      Front view of wire harness connector

      (to Multiplex Tilt and Telescopic ECU)

      Disconnect the K19 multiplex tilt and telescopic ECU connector.

    31. Measure the resistance according to the value(s) in the table below.

    32. FRONT STEERING CONTROL ECU (w/ VGRS System)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003VTTC16
      33. *a

      Front view of wire harness connector

      (to Front Steering Control ECU)

      Disconnect the K17 front steering control ECU connector.

    33. Measure the resistance according to the value(s) in the table below.

    34. BLIND SPOT MONITOR SENSOR LH (w/ Blind Spot Monitor System)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the Q50 blind spot monitor sensor LH connector.

        B003T4VC02
      35. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Blind Spot Monitor Sensor LH)

      		 - -

    35. Measure the resistance according to the value(s) in the table below.

    36. DRIVING SUPPORT ECU ASSEMBLY (w/ Lexus Safety System +)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the M2 driving support ECU assembly connector.

        B003U6SC03
      37. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Driving Support ECU Assembly)

      		 - -

    37. Measure the resistance according to the value(s) in the table below.

    38. MILLIMETER WAVE RADAR SENSOR ASSEMBLY (w/ Lexus Safety System +)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the B10 millimeter wave radar sensor assembly connector.

        B003VAJC14
      39. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Millimeter Wave Radar Sensor Assembly)

      		 - -

    39. Measure the resistance according to the value(s) in the table below.

    40. OPTION CONNECTOR (BUS BUFFER ECU)


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003V6UC06
      41. *a

      Front view of wire harness connector

      (to Option Connector (Bus Buffer ECU))

      Disconnect the K102 option connector (bus buffer ECU).

      Tech Tips

      Disconnect any CAN compatible optional devices from the option connector.

    41. Measure the resistance according to the value(s) in the table below.

    42. CLEARANCE WARNING ECU ASSEMBLY (w/ LEXUS Parking Assist-sensor System)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003WKWC01
      43. *1 DLC3
      *a

      Front view of wire harness connector

      (to Clearance Warning ECU Assembly)

      Disconnect the K44 clearance warning ECU assembly connector.

    43. Measure the resistance according to the value(s) in the table below.

    44. FORWARD RECOGNITION CAMERA (w/ Lexus Safety System +)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003W6EC13
      45. *1 DLC3
      *a

      Front view of wire harness connector

      (to Forward Recognition Camera)

      Disconnect the S18 forward recognition camera connector.

    45. Measure the resistance according to the value(s) in the table below.

    46. ABSORBER CONTROL ECU (w/ AVS System)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. B003TMVC01
      47. *1 DLC3
      *a

      Front view of wire harness connector

      (to Absorber Control ECU)

      Disconnect the K39 absorber control ECU connector.

    47. Measure the resistance according to the value(s) in the table below.

    48. ENGINE STOP AND START ECU (w/ Stop and Start System)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the A93 and K139 engine stop and start ECU connectors.

      3. B003VDGC12
      49. *a

      Front view of wire harness connector

      (to Engine Stop and Start ECU)

      Measure the resistance according to the value(s) in the table below.

    49. REAR TELEVISION CAMERA ASSEMBLY (w/ Parking Assist Monitor System without Parallel Parking Assist Function)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the T2 rear television camera assembly connector.

        B003UJKC06
      50. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Rear Television Camera Assembly)

      		 - -

    50. Measure the resistance according to the value(s) in the table below.

    51. STEREO COMPONENT EQUALIZER ASSEMBLY (w/ ASC System)

      Refer to Terminals of ECU.

      Click here


      1. Disconnect the cable from the negative (-) battery terminal.

      2. Disconnect the K160 stereo component equalizer assembly connector.

        B003UPWC04
      52. *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to Stereo Component Equalizer Assembly)

      		 - -

    52. Measure the resistance according to the value(s) in the table below.