CAN COMMUNICATION SYSTEM TERMINALS OF ECU

Note


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

    Click here

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

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

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


  • Operating the power 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

        B003YPZC20
        *a

        Front view of wire harness connector

        (No. 1 CAN Junction Connector)

        		 *b

        to No. 2 CAN Junction Connector

        (for V Bus)
        *c

        to Combination Meter Assembly

        (for V Bus)

        		 *d

        to Radio Receiver Assembly

        (w/ Navigation System)

        (w/o Navigation System)

        (for V Bus)
        *e

        • to Network Gateway ECU

          (w/ Network Gateway ECU)

        • to Option Connector (Bus Buffer ECU)

          (w/o Network Gateway ECU)

        (for V Bus)

        		 *f

        to Air Conditioning Amplifier Assembly

        (for V Bus)
        *g

        to Stereo Component Equalizer Assembly

        (w/ ASC System)

        (for V Bus)

        		 *h

        to Certification ECU (Smart Key ECU Assembly)

        (for V Bus)
        *i

        to Power Management Control ECU

        (for V Bus)

        		 *j

        to Power Steering ECU Assembly

        (for V Bus)

      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 V bus)
        K109-11 (CANL) B
        K109-2 (CANH) LG

        Combination meter assembly

        (for V bus)
        K109-12 (CANL) B
        K109-3 (CANH) R

        Radio receiver assembly*1*2

        (for V bus)
        K109-13 (CANL) B
        K109-4 (CANH) BE

        • Network gateway ECU*3

        • Option connector (Bus buffer ECU)*4

        (for V bus)
        K109-14 (CANL) B
        K109-5 (CANH) P

        Air conditioning amplifier assembly

        (for V bus)
        K109-15 (CANL) B
        K109-6 (CANH) V

        Stereo Component Equalizer Assembly*5

        (for V bus)
        K109-16 (CANL) B
        K109-7 (CANH) W

        Certification ECU (smart key ECU assembly)

        (for V bus)
        K109-17 (CANL) B
        K109-8 (CANH) SB

        Power management control ECU

        (for V Bus)
        K109-18 (CANL) B
        K109-9 (CANH) G

        Power steering ECU assembly

        (for V bus)
        K109-19 (CANL) B

        • *1: w/ Navigation system

        • *2: w/o Navigation system

        • *3: w/ Network gateway ECU

        • *4: w/o Network gateway ECU

        • *5: w/ ASC system

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


    1. Check the No. 2 CAN junction connector.


      1. Connection diagram

        B003YPZC21
        *a

        Front view of wire harness connector

        (No. 2 CAN Junction Connector)

        		 *b

        to No. 1 CAN Junction Connector

        (for V Bus)
        *c

        to Main Body ECU (Multiplex Network Body ECU)

        (for V Bus)

        		 *d

        to ECM

        (for V Bus)
        *e

        to Headlight Leveling ECU Assembly

        (for V Bus)

        		 *f

        to Airbag Sensor Assembly

        (for V Bus)
        *g

        to Yaw Rate Sensor

        (for V Bus)

        		 *h

        to DLC3

        (for V Bus)
        *i

        to Steering Sensor

        (for V Bus)

        		 *j

        to Skid Control ECU Assembly

        (for V Bus)

      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 V bus)
        K110-11 (CANL) B
        K110-2 (CANH) Y

        Main body ECU (multiplex network body ECU)

        (for V bus)
        K110-12 (CANL) B
        K110-3 (CANH) R

        ECM

        (for V bus)
        K110-13 (CANL) B
        K110-4 (CANH) LG

        Headlight leveling ECU assembly

        (for V bus)
        K110-14 (CANL) B
        K110-5 (CANH) BE

        Airbag sensor assembly

        (for V bus)
        K110-15 (CANL) B
        K110-6 (CANH) G

        Yaw rate sensor

        (for V bus)
        K110-16 (CANL) B
        K110-8 (CANH) W

        DLC3

        (for V bus)
        K110-18 (CANL) B
        K110-9 (CANH) P

        Steering sensor

        (for V bus)
        K110-19 (CANL) B
        K110-10 (CANH) SB

        Skid control ECU assembly

        (for V bus)
        K110-20 (CANL) B

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


    1. Check the No. 3 CAN junction connector.


      1. Connection diagram

        B003YFIC20
        *a

        Front view of wire harness connector

        (No. 3 CAN Junction Connector)

        		 *b

        to Absorber Control ECU

        (w/ AVS System)

        (for Sub Bus 2)
        *c

        to No. 5 CAN Junction Connector

        (for Sub Bus 2)

        		 *d

        to Power Management Control ECU

        (for Sub Bus 2)
        *e

        to No. 5 CAN Junction Connector

        (for Sub Bus 1)

        		 *f

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

        (w/ Seat Position Memory System)

        (for Sub Bus 1)
        *g

        to Junction Terminal

        (for Sub Bus 1)

        		 - -

      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
        K111-1 (CANH) SB

        Absorber control ECU*1

        (for Sub bus 2)
        K111-12 (CANL) B
        K111-3 (CANH) L

        No. 5 CAN junction connector

        (for Sub bus 2)
        K111-14 (CANL) B
        K111-4 (CANH) V

        Power management control ECU

        (for Sub bus 2)
        K111-15 (CANL) B
        K111-7 (CANH) L

        No. 5 CAN junction connector

        (for Sub bus 1)
        K111-18 (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

        Junction Terminal

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

        • *1: w/ AVS system

        • *2: w/ Seat position memory system

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


    1. Check the No. 5 CAN junction connector.


      1. Connection diagram

        B003YFIC21
        *a

        Front view of wire harness connector

        (No. 5 CAN Junction Connector)

        		 *b

        to No. 3 CAN Junction Connector

        (for Sub Bus 2)
        *c

        to No. 12 CAN Junction Connector

        (for Sub Bus 2)

        		 *d

        to Driving Support ECU Assembly

        (w/ Pre-crash Safety System)

        (for Sub Bus 2)
        *e

        to Clearance Warning ECU Assembly

        (w/ LEXUS Parking Assist-sensor System)

        (for Sub Bus 2)

        		 *f

        to No. 3 CAN Junction Connector

        (for Sub Bus 1)
        *g

        to Main Body ECU (Multiplex Network Body ECU)

        (for Sub Bus 1)

        		 *h

        to Outer Mirror Control ECU Assembly (for Driver side)

        (w/ Seat Position Memory System)

        (for Sub Bus 1)
        *i

        to Multiplex Tilt and Telescopic ECU

        (w/ Power Tilt and Power Telescopic System)

        (for Sub Bus 1)

        		 *j

        to Front Power Seat Switch LH

        (w/ Seat Position Memory System)

        (for Sub Bus 1)

      2. Check the connection diagram of the components which are connected to the No. 5 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K113-1 (CANH) L

        No. 3 CAN junction connector

        (for Sub bus 2)
        K113-12 (CANL) B
        K113-2 (CANH) LG

        No. 12 CAN junction connector

        (for Sub bus 2)
        K113-13 (CANL) B
        K113-5 (CANH) G

        Driving support ECU assembly*1

        (for Sub bus 2)
        K113-16 (CANL) B
        K113-6 (CANH) SB

        Clearance warning ECU assembly*2

        (for Sub bus 2)
        K113-17 (CANL) B
        K113-7 (CANH) L

        No. 3 CAN junction connector

        (for Sub bus 1)
        K113-18 (CANL) B
        K113-8 (CANH) P

        Main body ECU (multiplex network body ECU)

        (for Sub bus 1)
        K113-19 (CANL) B
        K113-9 (CANH) W

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

        (for Sub bus 1)
        K113-20 (CANL) B
        K113-10 (CANH) G

        Multiplex tilt and telescopic ECU*4

        (for Sub bus 1)
        K113-21 (CANL) B
        K113-11 (CANH) R

        Front power seat switch LH*3

        (for Sub bus 1)
        K113-22 (CANL) B

        • *1: w/ Pre-crash safety system

        • *2: w/ LEXUS parking assist-sensor system

        • *3: w/ Seat position memory system

        • *4: w/ Power tilt and power telescopic system

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


    1. Check the No. 8 CAN junction connector.


      1. Connection diagram

        B003YFIC22
        *a

        Front view of wire harness connector

        (No. 8 CAN Junction Connector)

        		 *b

        to Power Management Control ECU

        (for Sub Bus 15)
        *c

        to Skid Control ECU Assembly

        (for Sub Bus 15)

        		 *d

        to ECM

        (for Sub Bus 15)

      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
        K116-9 (CANH) R

        Power management control ECU

        (for Sub bus 15)
        K116-20 (CANL) B
        K116-10 (CANH) W

        Skid control ECU assembly

        (for Sub bus 15)
        K116-21 (CANL) B
        K116-11 (CANH) P

        ECM

        (for Sub bus 15)
        K116-22 (CANL) B

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


    1. Check the No. 10 CAN junction connector.


      1. Connection diagram

        B003XZMC11
        *a

        Front view of wire harness connector

        (to No. 10 CAN Junction Connector)

        		 *b

        to No. 12 CAN Junction Connector

        (for Sub Bus 2)
        *c

        to Network Gateway ECU

        (for Sub Bus 2)

        		 *d

        to Blind Spot Monitor Sensor LH

        (w/ Blind Spot Monitor System)

        (for Sub Bus 2)

      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
        Q55-1 (CANH) BE

        No. 12 CAN junction connector

        (for Sub bus 2)
        Q55-7 (CANL) B
        Q55-2 (CANH) V

        Network gateway ECU

        (for Sub bus 2)
        Q55-8 (CANL) B
        Q55-3 (CANH) R

        Blind spot monitor sensor LH*

        (for Sub bus 2)
        Q55-9 (CANL) B

        *: w/ Blind spot monitor system

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


    1. Check the No. 12 CAN junction connector.


      1. Connection diagram

        B003XZMC12
        *a

        Front view of wire harness connector

        (to No. 12 CAN Junction Connector)

        		 *b

        to No. 5 CAN Junction Connector

        (for Sub Bus 2)
        *c

        to No. 10 CAN Junction Connector

        (for Sub Bus 2)

        		 *d

        to Lane Departure Warning Camera

        (w/ Lane Departure Alert System)

        (for Sub Bus 2)

      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
        S17-1 (CANH) LG

        No. 5 CAN junction connector

        (for Sub bus 2)
        S17-7 (CANL) B
        S17-2 (CANH) BE

        No. 10 CAN junction connector

        (for Sub bus 2)
        S17-8 (CANL) B
        S17-3 (CANH) R

        Lane departure warning camera*

        (for Sub bus 2)
        S17-9 (CANL) B

        *: w/ Lane departure alert system

  8. JUNCTION TERMINAL (for LHD)


    1. Check the junction terminal.


      1. Connection diagram

        B003YAFC08
        *a

        Front view of wire harness connector

        (to 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 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

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


    1. Check the No. 1 CAN junction connector.


      1. Connection diagram

        B003YPZC22
        *a

        Front view of wire harness connector

        (No. 1 CAN Junction Connector)

        		 *b

        to No. 2 CAN Junction Connector

        (for V Bus)
        *c

        to Combination Meter Assembly

        (for V Bus)

        		 *d

        to Radio Receiver Assembly

        (w/ Navigation System)

        (w/o Navigation System)

        (for V Bus)
        *e

        to Airbag Sensor Assembly

        (for V Bus)

        		 *f

        to Yaw Rate Sensor

        (for V Bus)
        *g

        to Skid Control ECU Assembly

        (for V Bus)

        		 *h

        to Steering Sensor

        (for V Bus)
        *i

        to DLC3

        (for V Bus)

        		 - -

      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 V bus)
        K109-11 (CANL) B
        K109-2 (CANH) LG

        Combination meter assembly

        (for V bus)
        K109-12 (CANL) B
        K109-3 (CANH) R

        Radio receiver assembly*1*2

        (for V bus)
        K109-13 (CANL) B
        K109-4 (CANH) BE

        Airbag sensor assembly

        (for V bus)
        K109-14 (CANL) B
        K109-5 (CANH) G

        Yaw rate sensor

        (for V bus)
        K109-15 (CANL) B
        K109-6 (CANH) SB

        Skid control ECU assembly

        (for V bus)
        K109-16 (CANL) B
        K109-7 (CANH) P

        Steering sensor

        (for V bus)
        K109-17 (CANL) B
        K109-8 (CANH) W

        DLC3

        (for V bus)
        K109-18 (CANL) B

        • *1: w/ Navigation system

        • *2: w/o Navigation system

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


    1. Check the No. 2 CAN junction connector.


      1. Connection diagram

        B003YPZC24
        *a

        Front view of wire harness connector

        (No. 2 CAN Junction Connector)

        		 *b

        to No. 1 CAN Junction Connector

        (for V Bus)
        *c

        to Main Body ECU (Multiplex Network Body ECU)

        (for V Bus)

        		 *d

        to ECM

        (for V Bus)
        *e

        to Headlight Leveling ECU Assembly

        (for V Bus)

        		 *f

        • to Network Gateway ECU

          (w/ Network Gateway ECU)

        • to Option Connector (Bus Buffer ECU)

          (w/o Network Gateway ECU)

        (for V Bus)
        *g

        to Air Conditioning Amplifier Assembly

        (for V Bus)

        		 *h

        to Power Management Control ECU

        (for V Bus)
        *i

        to Certification ECU (Smart Key ECU Assembly)

        (for V Bus)

        		 *j

        to Stereo Component Equalizer Assembly

        (w/ ASC System)

        (for V Bus)
        *k

        to Power Steering ECU Assembly

        (for V Bus)

        		 - -

      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 V bus)
        K110-11 (CANL) B
        K110-2 (CANH) Y

        Main body ECU (multiplex network body ECU)

        (for V bus)
        K110-12 (CANL) B
        K110-3 (CANH) R

        ECM

        (for V bus)
        K110-13 (CANL) B
        K110-4 (CANH) LG

        Headlight leveling ECU assembly

        (for V bus)
        K110-14 (CANL) B
        K110-5 (CANH) BE

        • Network gateway ECU*1

        • Option connector (Bus buffer ECU)*2

        (for V bus)
        K110-15 (CANL) B
        K110-6 (CANH) P

        Air conditioning amplifier assembly

        (for V bus)
        K110-16 (CANL) B
        K110-7 (CANH) SB

        Power management control ECU

        (for V bus)
        K110-17 (CANL) B
        K110-8 (CANH) W

        Certification ECU (smart key ECU assembly)

        (for V bus)
        K110-18 (CANL) B
        K110-9 (CANH) V

        Stereo component equalizer assembly*3

        (for V bus)
        K110-19 (CANL) B
        K110-10 (CANH) G

        Power steering ECU assembly

        (for V bus)
        K110-20 (CANL) B

        • *1: w/ Network gateway ECU

        • *2: w/o Network gateway ECU

        • *3: w/ ASC system

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


    1. Check the No. 4 CAN junction connector.


      1. Connection diagram

        B003YFIC23
        *a

        Front view of wire harness connector

        (No. 4 CAN Junction Connector)

        		 *b

        to Absorber Control ECU

        (w/ AVS System)

        (for Sub Bus 2)
        *c

        to Driving Support ECU Assembly

        (w/ Pre-crash Safety System)

        (for Sub Bus 2)

        		 *d

        to No. 6 CAN Junction Connector

        (for Sub Bus 2)
        *e

        to Network Gateway ECU

        (for Sub Bus 2)

        		 *f

        to No. 6 CAN Junction Connector

        (for Sub Bus 1)
        *g

        to Multiplex Tilt and Telescopic ECU

        (w/ Power Tilt and Power Telescopic System)

        (for Sub Bus 1)

        		 *h

        to Front Power Seat Switch RH

        (w/ Seat Position Memory System)

        (for Sub Bus 1)
        *i

        to Outer Mirror Control ECU Assembly (for Driver side)

        (w/ Seat Position Memory System)

        (for Sub Bus 1)

        		 *j

        to Junction Terminal

        (for Sub Bus 1)

      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
        K112-1 (CANH) SB

        Absorber control ECU*1

        (for Sub bus 2)
        K112-12 (CANL) B
        K112-2 (CANH) G

        Driving support ECU assembly*2

        (for Sub bus 2)
        K112-13 (CANL) B
        K112-3 (CANH) L

        No. 6 CAN junction connector

        (for Sub bus 2)
        K112-14 (CANL) B
        K112-4 (CANH) R

        Network gateway ECU

        (for Sub bus 2)
        K112-15 (CANL) B
        K112-7 (CANH) L

        No. 6 CAN junction connector

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

        Multiplex tilt and telescopic ECU*3

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

        Front power seat switch RH*4

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

        Outer mirror control ECU assembly (for driver side)*4

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

        Junction terminal

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

        • *1: w/ AVS system

        • *2: w/ Pre-crash safety system

        • *3: w/ Power tilt and power telescopic system

        • *4: w/ Seat position memory system

  12. NO. 6 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 6 CAN junction connector.


      1. Connection diagram

        B003YFIC24
        *a

        Front view of wire harness connector

        (No. 6 CAN Junction Connector)

        		 *b

        to No. 4 CAN Junction Connector

        (for Sub Bus 2)
        *c

        to No. 12 CAN Junction Connector

        (for Sub Bus 2)

        		 *d

        to Clearance Warning ECU Assembly

        (w/ LEXUS Parking Assist-sensor System)

        (for Sub Bus 2)
        *e

        to No. 4 CAN Junction Connector

        (for Sub Bus 1)

        		 *f

        to Main Body ECU (Multiplex Network Body ECU)

        (for Sub Bus 1)
        *g

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

        (w/ Seat Position Memory System)

        (for Sub Bus 1)

        		 - -

      2. Check the connection diagram of the components which are connected to the No. 6 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        K114-1 (CANH) L

        No. 4 CAN junction connector

        (for Sub bus 2)
        K114-12 (CANL) B
        K114-2 (CANH) LG

        No. 12 CAN junction connector

        (for Sub bus 2)
        K114-13 (CANL) B
        K114-6 (CANH) SB

        Clearance warning ECU assembly*1

        (for Sub bus 2)
        K114-17 (CANL) B
        K114-7 (CANH) L

        No. 4 CAN junction connector

        (for Sub bus 1)
        K114-18 (CANL) B
        K114-8 (CANH) P

        Main body ECU (multiplex network body ECU)

        (for Sub bus 1)
        K114-19 (CANL) B
        K114-9 (CANH) W

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

        (for Sub bus 1)
        K114-20 (CANL) B

        • *1: w/ LEXUS parking assist-sensor system

        • *2: w/ Seat position memory system

  13. NO. 7 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 7 CAN junction connector.


      1. Connection diagram

        B003YFIC25
        *a

        Front view of wire harness connector

        (No. 7 CAN Junction Connector)

        		 *b

        to Power Management Control ECU

        (for Sub Bus 15)
        *c

        to Skid Control ECU Assembly

        (for Sub Bus 15)

        		 *d

        to ECM

        (for Sub Bus 15)

      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
        K115-9 (CANH) R

        Power management control ECU

        (for Sub bus 15)
        K115-20 (CANL) B
        K115-10 (CANH) W

        Skid control ECU assembly

        (for Sub bus 15)
        K115-21 (CANL) B
        K115-11 (CANH) P

        ECM

        (for Sub bus 15)
        K115-22 (CANL) B

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


    1. Check the No. 10 CAN junction connector.


      1. Connection diagram

        B003XZMC15
        *a

        Front view of wire harness connector

        (to No. 10 CAN Junction Connector)

        		 *b

        to No. 12 CAN Junction Connector

        (for Sub Bus 2)
        *c

        to Power Management Control ECU

        (for Sub Bus 2)

        		 *d

        to Blind Spot Monitor Sensor LH

        (w/ Blind Spot Monitor System)

        (for Sub Bus 2)

      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
        Q55-1 (CANH) BE

        No. 12 CAN junction connector

        (for Sub bus 2)
        Q55-7 (CANL) B
        Q55-2 (CANH) V

        Power management control ECU

        (for Sub bus 2)
        Q55-8 (CANL) B
        Q55-3 (CANH) R

        Blind spot monitor sensor LH*

        (for Sub bus 2)
        Q55-9 (CANL) B

        • *: w/ Blind spot monitor system

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


    1. Check the No. 12 CAN junction connector.


      1. Connection diagram

        B003XZMC14
        *a

        Front view of wire harness connector

        (to No. 12 CAN Junction Connector)

        		 *b

        to No. 6 CAN Junction Connector

        (for Sub Bus 2)
        *c

        to No. 10 CAN Junction Connector

        (for Sub Bus 2)

        		 *d

        to Lane Departure Warning Camera

        (w/ Lane Departure Alert System)

        (for Sub Bus 2)

      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
        S17-1 (CANH) LG

        No. 6 CAN junction connector

        (for Sub bus 2)
        S17-7 (CANL) B
        S17-2 (CANH) BE

        No. 10 CAN junction connector

        (for Sub bus 2)
        S17-8 (CANL) B
        S17-3 (CANH) R

        Lane departure warning camera*

        (for Sub bus 2)
        S17-9 (CANL) B

        *: w/ Lane departure alert system

  16. JUNCTION TERMINAL (for RHD)


    1. Check the junction terminal.


      1. Connection diagram

        B003YAFC09
        *a

        Front view of wire harness connector

        (to 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 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

  17. DLC3


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

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

      B003XUWC09
      *1 DLC3 - -

    3. ECM

      B003XXLC09
      4. *a

      Component without harness connected

      (ECM)

      		 - -

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

  2. Disconnect the A78 ECM connector.

    Disconnect the F5 ECM connector.

    B003XZSC05
    *a

    Front view of wire harness connector

    (to ECM)

    		 - -

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

  4. POWER MANAGEMENT CONTROL ECU


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

    2. B003YRKC37
    5. *a

    Rear view of wire harness connector

    (to Power Management Control ECU)

Disconnect the K33 power management control ECU connector.

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

  • B003YGZC04
    • *a

    Rear view of wire harness connector

    (to Power Management Control ECU)

    Disconnect the K32 power management control ECU connector.

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

  • COMBINATION METER ASSEMBLY


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

    2. B003YI3C17
    • *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.

  • INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    B003YD6C12
    • *1 Main Body ECU (Multiplex Network Body ECU) - -
    *a

    Component without harness connected

    (Instrument Panel Junction Block Assembly and Main Body ECU (Multiplex Network Body ECU))

    		 - -

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

    2. Disconnect the K1 main body ECU (multiplex network body ECU) connector.

      Disconnect the K2 main body ECU (multiplex network body ECU) connector.

      B003YEOC07
      *1 DLC3 - -
      *a

      Front view of wire harness connector

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

      		 - -

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

    4. SKID CONTROL ECU ASSEMBLY


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

      2. B003Y70C03
      5. *a

      Front view of wire harness connector

      (to Skid Control ECU Assembly)

      Disconnect the A25 skid control ECU assembly connector.

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

    6. STEERING SENSOR


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

      2. B003YGAC03
      7. *a

      Front view of wire harness connector

      (to Steering Sensor)

      Disconnect the K29 steering sensor connector.

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

    8. YAW RATE SENSOR


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

      2. B003YF9C18
      9. *a

      Front view of wire harness connector

      (to Yaw Rate Sensor)

      Disconnect the K85 yaw rate sensor connector.

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

    10. POWER STEERING ECU ASSEMBLY


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

      2. B003Y90C32
      11. *a

      Front view of wire harness connector

      (to Power Steering ECU Assembly)

      Disconnect the A19 power steering ECU assembly connector.

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

    12. AIRBAG SENSOR ASSEMBLY

      B003YDIC05
      13. *a

      Component without harness connected

      (Airbag Sensor Assembly)

      		 - -

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

      2. Disconnect the K51 airbag sensor assembly connector.

        B003XQTC13
        *1 DLC3 - -
        *a

        Front view of wire harness connector

        (to Airbag Sensor Assembly)

        		 - -

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

      4. CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


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

        2. B003Y4YC03
        5. *a

        Front view of wire harness connector

        (to Certification ECU (Smart Key ECU Assembly))

        Disconnect the K8 certification ECU (smart key ECU assembly) connector.

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

      6. RADIO RECEIVER ASSEMBLY (w/ Navigation System)


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

        2. B003XZ3C23
        7. *a

        Front view of wire harness connector

        (to Radio Receiver Assembly)

        Disconnect the K58 radio receiver assembly connector.

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

      8. RADIO RECEIVER ASSEMBLY (w/o Navigation System)

        B003Y7BC02
        9. *a

        Component without harness connected

        (Radio Receiver Assembly)

        		 - -

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

        2. Disconnect the K70 radio receiver assembly connector.

        3. Disconnect the K72 radio receiver assembly connector.

          B003Y99C19
          *a

          Front view of wire harness connector

          (to Radio Receiver Assembly)

          		 - -

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

        5. AIR CONDITIONING AMPLIFIER ASSEMBLY

          B003YJLC06
          6. *a

          Component without harness connected

          (Air Conditioning Amplifier Assembly)

          		 - -

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

          2. Disconnect the K10 air conditioning amplifier assembly connector.

            Disconnect the K11 air conditioning amplifier assembly connector.

            B003YPIC02
            *a

            Front view of wire harness connector

            (to Air Conditioning Amplifier Assembly)

            		 - -

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

          4. NETWORK GATEWAY ECU (w/ Network Gateway ECU)


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

            2. B003YAJC38
            5. *a

            Front view of wire harness connector

            (to Network Gateway ECU)

            Disconnect the K47 network gateway ECU connector.

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

          6. HEADLIGHT LEVELING ECU ASSEMBLY

            B003YS9C03
            7. *a

            Component without harness connected

            (Headlight Leveling ECU Assembly)

            		 - -

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

            2. Disconnect the A65 headlight leveling ECU assembly connector.

              B003XOCC03
              *1 DLC3 - -
              *a

              Front view of wire harness connector

              (to Headlight Leveling ECU Assembly)

              		 - -

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

            4. OUTER MIRROR CONTROL ECU ASSEMBLY (for Driver Side) (w/ Seat Position Memory System)


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

              2. B003YIGC17
              5. *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.

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

            6. OUTER MIRROR CONTROL ECU ASSEMBLY (for Front Passenger Side) (w/ Seat Position Memory System)


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

              2. B003YIGC18
              7. *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.

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

            8. FRONT POWER SEAT SWITCH LH (for LHD) (w/ Seat Position Memory System)

              B003XX0C06
              9. *a

              Component without harness connected

              (Front Power Seat Switch LH)

              		 - -

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

              2. Disconnect the b4 and b12 front power seat switch LH connectors.

                B003YQPC09
                *a

                Front view of wire harness connector

                (to Front Power Seat Switch LH)

                		 - -

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

              4. FRONT POWER SEAT SWITCH RH (for RHD) (w/ Seat Position Memory System)

                B003XTTC03
                5. *a

                Component without harness connected

                (Front Power Seat Switch RH)

                		 - -

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

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

                  B003YQPC10
                  *a

                  Front view of wire harness connector

                  (to Front Power Seat Switch RH)

                  		 - -

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

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


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

                  2. B003YD1C13
                  5. *a

                  Front view of wire harness connector

                  (to Multiplex Tilt and Telescopic ECU)

                  Disconnect the K19 multiplex tilt and telescopic ECU connector.

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

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

                  B003YAHC07
                  7. *a

                  Component without harness connected

                  (Blind Spot Monitor Sensor LH)

                  		 - -

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

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

                    B003Y79C03
                    *1 DLC3 - -
                    *a

                    Front view of wire harness connector

                    (to Blind Spot Monitor Sensor LH)

                    		 - -

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

                  4. DRIVING SUPPORT ECU ASSEMBLY (w/ Pre-crash Safety System)


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

                    2. B003Y0CC02
                    5. *1 DLC3
                    *a

                    Front view of wire harness connector

                    (to Driving Support ECU Assembly)

                    Disconnect the M1 driving support ECU assembly connector.

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

                  6. MILLIMETER WAVE RADAR SENSOR ASSEMBLY (w/ Pre-crash Safety System)


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

                    2. B003YOAC02
                    7. *1 DLC3
                    *a

                    Front view of wire harness connector

                    (to Millimeter Wave Radar Sensor Assembly)

                    Disconnect the B8 millimeter wave radar sensor assembly connector.

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

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


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

                    2. B003YD7C02
                    9. *1 DLC3
                    *a

                    Front view of wire harness connector

                    (to Clearance Warning ECU Assembly)

                    Disconnect the K44 clearance warning ECU assembly connector.

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

                  10. LANE DEPARTURE WARNING CAMERA (w/ Lane Departure Alert System)


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

                    2. B003Y9GC02
                    11. *1 DLC3
                    *a

                    Front view of wire harness connector

                    (to Lane Departure Warning Camera)

                    Disconnect the S9 lane departure warning camera connector.

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

                  12. ABSORBER CONTROL ECU (w/ AVS SYSTEM)


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

                    2. B003Y11C02
                    13. *1 DLC3
                    *a

                    Front view of wire harness connector

                    (to Absorber Control ECU)

                    Disconnect the K39 absorber control ECU connector.

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

                  14. STEREO COMPONENT EQUALIZER ASSEMBLY (w/ ASC SYSTEM)


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

                    2. B003YC6C01
                    15. *a

                    Front view of wire harness connector

                    (to Stereo Component Equalizer Assembly)

                    Disconnect the K36 stereo component equalizer assembly connector.

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

                  16. OPTION CONNECTOR (BUS BUFFER ECU) (w/o Network Gateway ECU)


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

                    2. B003YAJC45
                    17. *a

                    Front view of wire harness connector

                    (to Option connector (Bus buffer ECU))

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