CAN COMMUNICATION SYSTEM TERMINALS OF ECU

Note


  • After turning the ignition 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.

    Click here

  • Before measuring the resistance of the CAN bus, turn the ignition 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 ignition 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. 2 CAN JUNCTION CONNECTOR (w/o Blind Spot Monitor System)


    1. Check the No. 2 CAN junction connector.


      1. Connection diagram

        A005PHYC21
        *a

        Front view of wire harness connector

        (to No. 2 CAN Junction Connector)

        		 *b

        to Clearance Warning ECU Assembly

        (w/ TOYOTA Parking Assist-sensor System)
        *c

        to Forward Recognition Camera

        (w/ Toyota Safety Sense)

        		 *d

        to Millimeter Wave Radar Sensor Assembly

        (w/ Toyota Safety Sense)
        *e to Central Gateway ECU (Network Gateway ECU) - -

      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
        F112-1 (CANH) SB

        Clearance warning ECU assembly*1

        (for Bus 1)
        F112-12 (CANL) GR
        F112-2 (CANH) R

        Forward recognition camera*2

        (for Bus 1)
        F112-13 (CANL) GR
        F112-3 (CANH) G

        Millimeter wave radar sensor assembly*2

        (for Bus 1)
        F112-14 (CANL) GR
        F112-4 (CANH) B

        Central gateway ECU (network gateway ECU)

        (for Bus 1)
        F112-15 (CANL) GR
        F112-5 (CANH) P

        Central gateway ECU (network gateway ECU)

        (for Bus 1)
        F112-16 (CANL) GR

        • *1: w/ TOYOTA Parking Assist-sensor System

        • *2: w/ Toyota Safety Sense

  2. NO. 2 CAN JUNCTION CONNECTOR (w/ Blind Spot Monitor System)


    1. Check the No. 2 CAN junction connector.


      1. Connection diagram

        A005PHYC22
        *a

        Front view of wire harness connector

        (to No. 2 CAN Junction Connector)

        		 *b

        to Clearance Warning ECU Assembly

        (w/ TOYOTA Parking Assist-sensor System)
        *c

        to Forward Recognition Camera

        (w/ Toyota Safety Sense)

        		 *d

        to Millimeter Wave Radar Sensor Assembly

        (w/ Toyota Safety Sense)
        *e to No. 11 CAN Junction Connector *f to Central Gateway ECU (Network Gateway ECU)

      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
        F112-1 (CANH) SB

        Clearance warning ECU assembly*1

        (for Bus 1)
        F112-12 (CANL) GR
        F112-2 (CANH) R

        Forward recognition camera*2

        (for Bus 1)
        F112-13 (CANL) GR
        F112-3 (CANH) G

        Millimeter wave radar sensor assembly*2

        (for Bus 1)
        F112-14 (CANL) GR
        F112-4 (CANH) B

        No. 11 CAN junction connector

        (for Bus 1)
        F112-15 (CANL) GR
        F112-5 (CANH) P

        Central gateway ECU (network gateway ECU)

        (for Bus 1)
        F112-16 (CANL) GR

        • *1: w/ TOYOTA Parking Assist-sensor System

        • *2: w/ Toyota Safety Sense

  3. NO. 3 CAN JUNCTION CONNECTOR (w/ Stop and Start System)


    1. Check the No. 3 CAN junction connector.


      1. Connection diagram

        A005PHYC23
        *a

        Front view of wire harness connector

        (to No. 3 CAN Junction Connector)

        		 *b to Central Gateway ECU (Network Gateway ECU)
        *c to ECM *d to Engine Stop and Start ECU

      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
        F113-1 (CANH) W

        Central gateway ECU (network gateway ECU)

        (for Bus 2)
        F113-12 (CANL) P
        F113-4 (CANH) GR

        ECM

        (for Bus 2)
        F113-15 (CANL) P
        F113-6 (CANH) R

        Engine stop and start ECU

        (for Bus 2)
        F113-17 (CANL) P

  4. NO. 4 CAN JUNCTION CONNECTOR


    1. Check the No. 4 CAN junction connector.


      1. Connection diagram

        A005PHYC24
        *a

        Front view of wire harness connector

        (to No. 4 CAN Junction Connector)

        		 *b to Combination Meter Assembly
        *c to Main Body ECU (Multiplex Network Body ECU) *d

        to Headlight ECU Sub-assembly LH

        (for LED Headlight)
        *e to Air Conditioning Amplifier Assembly *f

        to Certification ECU (Smart Key ECU Assembly)

        (w/ Entry and Start System)
        *g to Central Gateway ECU (Network Gateway ECU) *h

        to Telematics Transceiver

        (w/ Manual (SOS) Switch)
        *i

        to Radio and Display Receiver Assembly

        (for Radio and Display Type)

        		 - -

      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
        F114-1 (CANH) V

        Combination meter assembly

        (for Bus 5)
        F114-12 (CANL) SB
        F114-2 (CANH) G

        Main body ECU (multiplex network body ECU)

        (for Bus 5)
        F114-13 (CANL) SB
        F114-3 (CANH) L

        Headlight ECU sub-assembly LH*1

        (for Bus 5)
        F114-14 (CANL) SB
        F114-4 (CANH) P

        Air conditioning amplifier assembly

        (for Bus 5)
        F114-15 (CANL) SB
        F114-5 (CANH) R

        Certification ECU (smart key ECU assembly)*2

        (for Bus 5)
        F114-16 (CANL) SB
        F114-6 (CANH) B

        Central gateway ECU (network gateway ECU)

        (for Bus 5)
        F114-17 (CANL) SB
        F114-8 (CANH) GR

        Telematics transceiver*3

        (for Bus 3)
        F114-19 (CANL) LG
        F114-9 (CANH) B

        Radio and display receiver assembly*4

        (for Bus 3)
        F114-20 (CANL) LG
        F114-10 (CANH) G

        Central gateway ECU (network gateway ECU)

        (for Bus 3)
        F114-21 (CANL) LG
        F114-11 (CANH) V

        Central gateway ECU (network gateway ECU)

        (for Bus 3)
        F114-22 (CANL) LG

        • *1: for LED Headlight

        • *2: w/ Entry and Start System

        • *3: w/ Manual (SOS) Switch

        • *4: for Radio and Display Type

  5. NO. 5 CAN JUNCTION CONNECTOR (for RHD)


    1. Check the No. 5 CAN junction connector.


      1. Connection diagram

        A005PHYC25
        *a

        Front view of wire harness connector

        (to No. 5 CAN Junction Connector)

        		 *b to Airbag Sensor Assembly
        *c to Power Steering ECU Assembly *d

        to 4WD ECU Assembly

        (for AWD)
        *e to Steering Sensor *f to No. 7 CAN Junction Connector

      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
        F115-1 (CANH) B

        Airbag sensor assembly

        (for Bus 4)
        F115-12 (CANL) W
        F115-3 (CANH) P

        Power steering ECU assembly

        (for Bus 4)
        F115-14 (CANL) W
        F115-4 (CANH) L

        4WD ECU assembly*1

        (for Bus 4)
        F115-15 (CANL) W
        F115-5 (CANH) BE

        Steering sensor

        (for Bus 4)
        F115-16 (CANL) W
        F115-6 (CANH) GR

        No. 7 CAN junction connector

        (for Bus 4)
        F115-17 (CANL) W

        • *1: for AWD

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


    1. Check the No. 7 CAN junction connector.


      1. Connection diagram

        A005PHYC26
        *a

        Front view of wire harness connector

        (to No. 7 CAN Junction Connector)

        		 *b to No. 5 CAN Junction Connector
        *c to Central Gateway ECU (Network Gateway ECU) *d to Brake Actuator Assembly

      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
        F117-1 (CANH) GR

        No. 5 CAN junction connector

        (for Bus 4)
        F117-12 (CANL) W
        F117-2 (CANH) B

        Central gateway ECU (network gateway ECU)

        (for Bus 4)
        F117-13 (CANL) W
        F117-7 (CANH) LG

        Brake actuator assembly

        (for Bus 4)
        F117-18 (CANL) W

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


    1. Check the No. 9 CAN junction connector.


      1. Connection diagram

        A005PHYC27
        *a

        Front view of wire harness connector

        (to No. 9 CAN Junction Connector)

        		 *b to Airbag Sensor Assembly
        *c to Steering Sensor *d to Power Steering ECU Assembly
        *e to No. 10 CAN Junction Connector - -

      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
        F123-1 (CANH) B

        Airbag sensor assembly

        (for Bus 4)
        F123-12 (CANL) W
        F123-5 (CANH) BE

        Steering sensor

        (for Bus 4)
        F123-16 (CANL) W
        F123-6 (CANH) P

        Power steering ECU assembly

        (for Bus 4)
        F123-17 (CANL) W
        F123-7 (CANH) GR

        No. 10 CAN junction connector

        (for Bus 4)
        F123-18 (CANL) W

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


    1. Check the No. 10 CAN junction connector.


      1. Connection diagram

        A005PHYC28
        *a

        Front view of wire harness connector

        (to No. 10 CAN Junction Connector)

        		 *b to No. 9 CAN Junction Connector
        *c to Central Gateway ECU (Network Gateway ECU) *d to Brake Actuator Assembly
        *e

        to 4WD ECU Assembly

        (for AWD)

        		 - -

      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
        F124-1 (CANH) GR

        No. 9 CAN junction connector

        (for Bus 4)
        F124-12 (CANL) W
        F124-2 (CANH) B

        Central gateway ECU (network gateway ECU)

        (for Bus 4)
        F124-13 (CANL) W
        F124-5 (CANH) LG

        Brake actuator assembly

        (for Bus 4)
        F124-16 (CANL) W
        F124-6 (CANH) L

        4WD ECU assembly*1

        (for Bus 4)
        F124-17 (CANL) W

        • *1: for AWD

  9. NO. 11 CAN JUNCTION CONNECTOR (w/ Blind Spot Monitor System)


    1. Check the No. 11 CAN junction connector.


      1. Connection diagram

        A005PHYC09
        *a

        Front view of wire harness connector

        (to No. 11 CAN Junction Connector)

        		 *b to Central Gateway ECU (Network Gateway ECU)
        *c to Blind Spot Monitor Sensor LH *d to No. 2 CAN Junction Connector

      2. Check the connection diagram of the components which are connected to the No. 11 CAN junction connector.

        Terminal No. (Symbol) Wiring Color Connected to
        M92-1 (CANH) R

        Central gateway ECU (network gateway ECU)

        (for Bus 1)
        M92-12 (CANL) GR
        M92-6 (CANH) G

        Blind spot monitor sensor LH

        (for Bus 1)
        M92-17 (CANL) GR
        M92-11 (CANH) B

        No. 2 CAN junction connector

        (for Bus 1)
        M92-22 (CANL) GR

  10. DLC3


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

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

      A005P80C06
      *1 DLC3 - -

    3. CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

      A005P1KC17
      4. *a

      Component without harness connected

      (Central Gateway ECU (Network Gateway ECU))

      		 - -

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

  2. Disconnect the F74 central gateway ECU (network gateway ECU) connector.

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

    A005PDXC05
    *a

    Front view of wire harness connector

    (to Central Gateway ECU (Network Gateway ECU))

    		 - -

  4. STEERING SENSOR


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

    2. Disconnect the F69 steering sensor connector.

    3. A005PK3C01
    5. *a

    Front view of wire harness connector

    (to Steering Sensor)

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

  • ECM (for 8NR-FTS)

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the A38 and C62 ECM connectors.

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

      A005QAAC11
    • *a

    Front view of wire harness connector

    (to ECM)

    		 - -

  • ECM (for 3ZR-FAE)

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the A38 and C63 ECM connectors.

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

      A005PD8C01
    • *a

    Front view of wire harness connector

    (to ECM)

    		 - -

  • COMBINATION METER ASSEMBLY

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the F4 combination meter assembly connector.

    3. A005PY7C20
    • *a

    Front view of wire harness connector

    (to Combination Meter Assembly)

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

  • BRAKE ACTUATOR ASSEMBLY

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the A42 brake actuator assembly connector.

    3. A005P9YC03
    • *a

    Front view of wire harness connector

    (to Brake Actuator Assembly)

    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 F15 main body ECU (multiplex network body ECU) connector.

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

      A005QB6C04
    • *1 DLC3 - -
    *a

    Front view of wire harness connector

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

    		 - -

  • CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Entry and Start System)

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the F1 certification ECU (smart key ECU assembly) connector.

    3. A005QCJC01
    • *a

    Front view of wire harness connector

    (to Certification ECU (Smart Key ECU Assembly))

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

  • POWER STEERING ECU ASSEMBLY

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the F23 and F68 power steering ECU assembly connectors.

    3. A005P9PC08
    • *a

    Front view of wire harness connector

    (to Power Steering ECU Assembly)

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

  • CLEARANCE WARNING ECU ASSEMBLY (w/ TOYOTA Parking Assist-sensor System)

    Refer to Terminals of ECU.



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

    2. Disconnect the F38 clearance warning ECU assembly connector.

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

      A005PZ3C01
    • *1 DLC3 - -
    *a

    Front view of wire harness connector

    (to Clearance Warning ECU Assembly)

    		 - -

  • AIRBAG SENSOR ASSEMBLY

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the F70 airbag sensor assembly connector.

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

      A005P15C03
    • *1 DLC3 - -
    *a

    Front view of wire harness connector

    (to Airbag Sensor Assembly)

    		 - -

  • AIR CONDITIONING AMPLIFIER ASSEMBLY (w/ Top-mounted Air Conditioner Pressure Sensor)

    Refer to Terminals of ECU.



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

    2. Disconnect the F72 air conditioning amplifier assembly connector.

    3. A005QD4C45
    • *a

    Front view of wire harness connector

    (to Air Conditioning Amplifier Assembly)

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

  • AIR CONDITIONING AMPLIFIER ASSEMBLY (w/ Side-mounted Air Conditioner Pressure Sensor)

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the F73 air conditioning amplifier assembly connector.

    3. A005OGBC14
    • *a

    Front view of wire harness connector

    (to Air Conditioning Amplifier Assembly)

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

  • RADIO AND DISPLAY RECEIVER ASSEMBLY (for Radio and Display Type)

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the F125 and F126 radio and display receiver assembly connectors.

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

      A005PHGC01
    • *a

    Front view of wire harness connector

    (to Radio and Display Receiver Assembly)

    		 - -

  • HEADLIGHT ECU SUB-ASSEMBLY LH (for LED Headlight)

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the A16 headlight ECU sub-assembly LH connector.

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

      A005PI9C04
    • *1 DLC3 - -
    *a

    Front view of wire harness connector

    (to Headlight ECU Sub-assembly LH)

    		 - -

  • 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 M62 blind spot monitor sensor LH connector.

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

      A005PQPC05
    • *1 DLC3 - -
    *a

    Front view of wire harness connector

    (to Blind Spot Monitor Sensor LH)

    		 - -

  • FORWARD RECOGNITION CAMERA (w/ Toyota Safety Sense)

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the R5 forward recognition camera connector.

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

      A005Q37C04
    • *1 DLC3 - -
    *a

    Front view of wire harness connector

    (to Forward Recognition Camera)

    		 - -

  • MILLIMETER WAVE RADAR SENSOR ASSEMBLY (w/ Toyota Safety Sense)

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the A2 millimeter wave radar sensor assembly connector.

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

      A005OEHC03
    • *1 DLC3 - -
    *a

    Front view of wire harness connector

    (to Millimeter Wave Radar Sensor Assembly)

    		 - -

  • 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. A005Q5KC27
    • *a

    Front view of wire harness connector

    (to Engine Stop and Start ECU)

    Disconnect the A61 and F77 engine stop and start ECU connectors.

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

  • TELEMATICS TRANSCEIVER (w/ Manual (SOS) Switch)

    Refer to Terminals of ECU.

    Click here


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

    2. A005ON2C29
    • *a

    Front view of wire harness connector

    (to Telematics Transceiver)

    Disconnect the F51 telematics transceiver connector.

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

  • 4WD ECU ASSEMBLY (for AWD)

    Refer to Terminals of ECU.

    Click here


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

    2. Disconnect the M77 4WD ECU assembly connector.

      A005PEDC04
    • *1 DLC3 - -
    *a

    Front view of wire harness connector

    (to 4WD ECU Assembly)

    		 - -

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