CAN COMMUNICATION SYSTEM(for RHD without Entry and Start System) TERMINALS OF ECU

Tech Tips

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.


  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system Click here.

      Note


      • Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the ignition switch, any switches or any doors. If doors need to be opened in order to check connectors, open the doors and leave them open.

      • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.

      • When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

  2. JUNCTION CONNECTOR


    1. No. 1 Junction Connector

      A01XH4EE01
      Text in Illustration
      *a for No. 5 Junction Connector *b for No. 2 Junction Connector (V2 Bus)
      *c for No. 2 Junction Connector (V1 Bus) *d for Combination Meter Assembly
      *e

      • for Master Cylinder Solenoid (Skid control ECU) (w/ Vehicle Stability Control System [for Hydraulic Brake Booster])

      • for Brake Actuator Assembly (Skid Control ECU) (w/o Vehicle Stability Control System)

      		 - -
      No. 1 Junction Connector Wiring Color Connect to
      A72-1 (CANH) LG No. 5 junction connector
      A72-12 (CANL) W
      A72-2 (CANH) B No. 2 junction connector (V2 bus)
      A72-13 (CANL) W
      A72-9 (CANH) B No. 2 junction connector (V1 bus)
      A72-20 (CANL) W
      A72-10 (CANH) LG Combination meter assembly
      A72-21 (CANL) W
      A72-11 (CANH) R

      • Master cylinder solenoid (skid control ECU)*1

      • Brake actuator assembly (skid control ECU)*2
      A72-22 (CANL) W

      • *1: w/ Vehicle Stability Control System (for Hydraulic Brake Booster)

      • *2: w/o Vehicle Stability Control System

    2. No. 2 Junction Connector


      1. G132 No. 2 Junction Connector

        A01XFGJE01
        Text in Illustration
        *a for No. 3 Junction Connector *b for Main Body ECU (Multiplex Network Body ECU)
        *c for DLC3 *d for Center Airbag Sensor Assembly
        *e for Spiral Cable Sub-assembly (Steering Angle Sensor) (w/ Vehicle Stability Control System [for Hydraulic Brake Booster]) *f for No. 1 Junction Connector
        *g for Radio and Display Receiver Assembly (w/ Audio and Visual System [for Radio and Display Type]) - -
        No. 2 Junction Connector Wiring Color Connect to
        G132-1 (CANH) GR No. 3 junction connector
        G132-12 (CANL) W
        G132-2 (CANH) L Main body ECU (multiplex network body ECU)
        G132-13 (CANL) W
        G132-4 (CANH) R DLC3
        G132-15 (CANL) W
        G132-5 (CANH) Y Center airbag sensor assembly
        G132-16 (CANL) W
        G132-7 (CANH) G Spiral cable sub-assembly (steering angle sensor)*1
        G132-18 (CANL) W
        G132-8 (CANH) B No. 1 junction connector
        G132-19 (CANL) W
        G132-9 (CANH) P Radio and display receiver assembly*2
        G132-20 (CANL) W

        • *1: w/ Vehicle Stability Control System (for Hydraulic Brake Booster)

        • *2: w/ Audio and Visual System (for Radio and Display Type)

      2. G95 No. 2 Junction Connector (w/ TOYOTA Parking Assist-sensor System [for 4 Sensor Type])

        A01XHEYE02
        Text in Illustration
        *a for No. 3 Junction Connector *b for Clearance Warning ECU Assembly
        *c for No. 1 Junction Connector - -
        No. 2 Junction Connector Wiring Color Connect to
        G95-1 (CANH) P No. 3 junction connector
        G95-12 (CANL) W
        G95-2 (CANH) R Clearance warning ECU assembly
        G95-13 (CANL) W
        G95-3 (CANH) B No. 1 junction connector
        G95-14 (CANL) W

    3. No. 3 Junction Connector


      1. G134 No. 3 Junction Connector

        A01XCD8E01
        Text in Illustration
        *a for No. 2 Junction Connector *b for ECM
        *c for Four Wheel Drive Control ECU *d for Air Conditioning Amplifier Assembly
        *e for Power Steering ECU Assembly (for 1KD-FTV) *f for Network Gateway ECU (w/ TOYOTA Parking Assist-sensor System [for 4 Sensor Type])
        *g for Yaw Rate Sensor Assembly - -
        No. 3 Junction Connector Wiring Color Connect to
        G134-1 (CANH) GR No. 2 junction connector
        G134-12 (CANL) W
        G134-2 (CANH) LG ECM
        G134-13 (CANL) W
        G134-3 (CANH) G Four wheel drive control ECU
        G134-14 (CANL) W
        G134-4 (CANH) BR Air conditioning amplifier assembly
        G134-15 (CANL) W
        G134-5 (CANH) L Power steering ECU assembly*1
        G134-16 (CANL) W
        G134-6 (CANH) V Network gateway ECU*2
        G134-17 (CANL) W
        G134-8 (CANH) R Yaw rate sensor assembly
        G134-19 (CANL) W

        • *1: for 1KD-FTV

        • *2: w/ TOYOTA Parking Assist-sensor System (for 4 Sensor Type)

      2. G98 No. 3 Junction Connector (w/ TOYOTA Parking Assist-sensor System [for 4 Sensor Type])

        A01XLRSE02
        Text in Illustration
        *a for Network Gateway ECU *b for No. 2 Junction Connector
        No. 3 Junction Connector Wiring Color Connect to
        G98-1 (CANH) L Network gateway ECU
        G98-12 (CANL) W
        G98-3 (CANH) P No. 2 junction connector
        G98-14 (CANL) W
    4. A01XH6WE02
      Text in Illustration
      *a for No. 1 Junction Connector

      No. 5 Junction Connector (w/ TOYOTA Parking Assist-sensor System [for 4 Sensor Type])

      No. 5 Junction Connector Wiring Color Connect to
      G102-2 (CANL) W No. 1 junction connector
      G102-3 (CANH) LG

  3. CHECK DLC3


    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

    2. A01XEV4E02

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G48-6 (CANH) - G48-14 (CANL) R - W Ignition switch off 54 to 69 Ω
      G48-6 (CANH) - G48-4 (CG) R - W-B Ignition switch off 200 Ω or higher
      G48-14 (CANL) - G48-4 (CG) W - W-B Ignition switch off 200 Ω or higher
      G48-6 (CANH) - G48-16 (BAT) R - GR Ignition switch off 6 kΩ or higher
      G48-14 (CANL) - G48-16 (BAT) W - GR Ignition switch off 6 kΩ or higher

  4. CHECK ECM (for 1KD-FTV)

    A01XDHHE01

    1. Disconnect the C93, G57 and G58 ECM connectors.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G58-35 (CANH) - G58-36 (CANL) LG - W Ignition switch off 108 to 132 Ω
      G58-35 (CANH) - C93-1 (E1) LG - BR Ignition switch off 200 Ω or higher
      G58-36 (CANL) - C93-1 (E1) W - BR Ignition switch off 200 Ω or higher
      G58-35 (CANH) - G57-23 (BATT) LG - L Ignition switch off 6 kΩ or higher
      G58-36 (CANL) - G57-23 (BATT) W - L Ignition switch off 6 kΩ or higher

  5. CHECK ECM (for 5L-E)

    A01XDKNE01

    1. Disconnect the C161 and G183 ECM connectors.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G183-25 (CANH) - G183-31 (CANL) LG - W Ignition switch off 108 to 132 Ω
      G183-25 (CANH) - C161-5 (E1) LG - BR Ignition switch off 200 Ω or higher
      G183-31 (CANL) - C161-5 (E1) W - BR Ignition switch off 200 Ω or higher
      G183-25 (CANH) - G183-2 (BATT) LG - L Ignition switch off 6 kΩ or higher
      G183-31 (CANL) - G183-2 (BATT) W - L Ignition switch off 6 kΩ or higher

  6. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    A01XHT2E02
    Text in Illustration
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU) Click here.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G64-14 (CANH) - G64-13 (CANL) L - W Ignition switch off 54 to 69 Ω
      G64-14 (CANH) - A-11 (GND1) L - None Ignition switch off 200 Ω or higher
      G64-13 (CANL) - A-11 (GND1) W - None Ignition switch off 200 Ω or higher
      G64-14 (CANH) - A-30 (BECU) L - None Ignition switch off 6 kΩ or higher
      G64-13 (CANL) - A-30 (BECU) W - None Ignition switch off 6 kΩ or higher

  7. CHECK NETWORK GATEWAY ECU (w/ TOYOTA Parking Assist-sensor System [for 4 Sensor Type])

    A01XF1KE01
    Text in Illustration
    *A for V1 Bus *B for V2 Bus

    1. Disconnect the G155 network gateway ECU connector.

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

      for V1 Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G155-16 (CA1H) - G155-15 (CA1L) V - W Ignition switch off 54 to 69 Ω
      G155-16 (CA1H) - G155-4 (GND) V - W-B Ignition switch off 200 Ω or higher
      G155-15 (CA1L) - G155-4 (GND) W - W-B Ignition switch off 200 Ω or higher
      G155-16 (CA1H) - G155-2 (BAT) V - L Ignition switch off 6 kΩ or higher
      G155-15 (CA1L) - G155-2 (BAT) W - L Ignition switch off 6 kΩ or higher
      for V2 Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G155-13 (CA2H) - G155-12 (CA2L) L - W Ignition switch off 108 to 132 Ω
      G155-13 (CA2H) - G155-4 (GND) L - W-B Ignition switch off 200 Ω or higher
      G155-12 (CA2L) - G155-4 (GND) W - W-B Ignition switch off 200 Ω or higher
      G155-13 (CA2H) - G155-2 (BAT) L - L Ignition switch off 6 kΩ or higher
      G155-12 (CA2L) - G155-2 (BAT) W - L Ignition switch off 6 kΩ or higher

  8. CHECK COMBINATION METER ASSEMBLY

    A01XIM1E04

    1. Disconnect the G6 combination meter assembly connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G6-40 (CANH) - G6-39 (CANL) LG - W Ignition switch off 108 to 132 Ω
      G6-40 (CANH) - G6-21 (E2) LG - BR Ignition switch off 200 Ω or higher
      G6-39 (CANL) - G6-21 (E2) W - BR Ignition switch off 200 Ω or higher
      G6-40 (CANH) - G6-26 (B) LG - L Ignition switch off 6 kΩ or higher
      G6-39 (CANL) - G6-26 (B) W - L Ignition switch off 6 kΩ or higher

  9. CHECK POWER STEERING ECU ASSEMBLY (for 1KD-FTV)

    A01XMKHE04

    1. Disconnect the G46 power steering ECU assembly connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G46-1 (CANH) - G46-2 (CANL) L - W Ignition switch off 54 to 69 Ω
      G46-1 (CANH) - G46-3 (GND) L - W-B Ignition switch off 200 Ω or higher
      G46-2 (CANL) - G46-3 (GND) W - W-B Ignition switch off 200 Ω or higher
      G46-1 (CANH) - G48-16 (BAT) L - GR Ignition switch off 6 kΩ or higher
      G46-2 (CANL) - G48-16 (BAT) W - GR Ignition switch off 6 kΩ or higher

  10. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

    A01XFWOE08

    1. Disconnect the G25 air conditioning amplifier assembly connector.

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

      Terminal No. (Symbol) Wiring Color Condition Specified Condition
      G25-11 (CANH) - G25-12 (CANL) BR - W Ignition switch off 54 to 69 Ω
      G25-11 (CANH) - G25-14 (GND) BR - W-B Ignition switch off 200 Ω or higher
      G25-12 (CANL) - G25-14 (GND) W - W-B Ignition switch off 200 Ω or higher
      G25-11 (CANH) - G25-21 (B) BR - V Ignition switch off 6 kΩ or higher
      G25-12 (CANL) - G25-21 (B) W - V Ignition switch off 6 kΩ or higher

  11. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    A01XGPKE01

    1. Disconnect the G1 center airbag sensor assembly connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G1-13 (CANH) - G1-22 (CANL) Y - W Ignition switch off 54 to 69 Ω
      G1-13 (CANH) - G1-25 (E1) Y - W-B Ignition switch off 200 Ω or higher
      G1-22 (CANL) - G1-25 (E1) W - W-B Ignition switch off 200 Ω or higher
      G1-13 (CANH) - G48-16 (BAT) Y - GR Ignition switch off 6 kΩ or higher
      G1-22 (CANL) - G48-16 (BAT) W - GR Ignition switch off 6 kΩ or higher

  12. CHECK MASTER CYLINDER SOLENOID (SKID CONTROL ECU) (w/ Vehicle Stability Control System [for Hydraulic Brake Booster])

    B001I5HE03

    1. Disconnect the A7 master cylinder solenoid (skid control ECU) connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      A7-11 (CANH) - A7-25 (CANL) R - W Ignition switch off 54 to 69 Ω
      A7-11 (CANH) - A7-1 (GND1) R - W-B Ignition switch off 200 Ω or higher
      A7-25 (CANL) - A7-1 (GND1) W - W-B Ignition switch off 200 Ω or higher
      A7-11 (CANH) - A7-2 (+BM1) R - B Ignition switch off 6 kΩ or higher
      A7-25 (CANL) - A7-2 (+BM1) W - B Ignition switch off 6 kΩ or higher

  13. CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (w/o Vehicle Stability Control System)

    A01XIMFE03

    1. Disconnect the A6 brake actuator assembly (skid control ECU) connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      A6-25 (CANH) - A6-14 (CANL) R - W Ignition switch off 54 to 69 Ω
      A6-25 (CANH) - A6-1 (GND1) R - W-B Ignition switch off 200 Ω or higher
      A6-14 (CANL) - A6-1 (GND1) W - W-B Ignition switch off 200 Ω or higher
      A6-25 (CANH) - A6-24 (BM) R - B Ignition switch off 6 kΩ or higher
      A6-14 (CANL) - A6-24 (BM) W - B Ignition switch off 6 kΩ or higher

  14. CHECK SPIRAL CABLE SUB-ASSEMBLY (STEERING ANGLE SENSOR) (w/ Vehicle Stability Control [for Hydraulic Brake Booster])


    1. A01XETXE04

      Disconnect the G33 spiral cable sub-assembly (steering angle sensor) connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G33-4 (CANH) - G33-3 (CANL) G - W Ignition switch off 54 to 69 Ω
      G33-4 (CANH) - G33-2 (ESS) G - W-B Ignition switch off 200 Ω or higher
      G33-3 (CANL) - G33-2 (ESS) W - W-B Ignition switch off 200 Ω or higher
      G33-4 (CANH) - G33-6 (BAT) G - L Ignition switch off 6 kΩ or higher
      G33-3 (CANL) - G33-6 (BAT) W - L Ignition switch off 6 kΩ or higher

  15. CHECK YAW RATE SENSOR ASSEMBLY

    A01XDCWE02

    1. Disconnect the G52 yaw rate sensor assembly connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G52-3 (CANH) - G52-2 (CANL) R - W Ignition switch off 54 to 69 Ω
      G52-3 (CANH) - G52-1 (GND) R - W-B Ignition switch off 200 Ω or higher
      G52-2 (CANL) - G52-1 (GND) W - W-B Ignition switch off 200 Ω or higher
      G52-3 (CANH) - G48-16 (BAT) R - GR Ignition switch off 6 kΩ or higher
      G52-2 (CANL) - G48-16 (BAT) W - GR Ignition switch off 6 kΩ or higher

  16. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY (w/ Audio and Visual System [for Radio and Display Type])

    A01XG78E01

    1. Disconnect the H49 and H51 radio and display receiver assembly connectors.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      H51-9 (CANH) - H51-10 (CANL) W - P Ignition switch off 54 to 69 Ω
      H51-9 (CANH) - H49-7 (GND1) W - BR Ignition switch off 200 Ω or higher
      H51-10 (CANL) - H49-7 (GND1) P - BR Ignition switch off 200 Ω or higher
      H51-9 (CANH) - H49-4 (+B1) W - R Ignition switch off 6 kΩ or higher
      H51-10 (CANL) - H49-4 (+B1) P - R Ignition switch off 6 kΩ or higher

  17. CHECK FOUR WHEEL DRIVE CONTROL ECU

    A01XCQ5E04

    1. Disconnect the G53 and G54 four wheel drive control ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G53-19 (CANH) - G53-20 (CANL) G - W Ignition switch off 54 to 69 Ω
      G53-19 (CANH) - G54-4 (GND) G - W-B Ignition switch off 200 Ω or higher
      G53-20 (CANL) - G54-4 (GND) W - W-B Ignition switch off 200 Ω or higher
      G53-19 (CANH) - G48-16 (BAT) G - GR Ignition switch off 6 kΩ or higher
      G53-20 (CANL) - G48-16 (BAT) W - GR Ignition switch off 6 kΩ or higher

  18. CLEARANCE WARNING ECU ASSEMBLY (w/ TOYOTA Parking Assist-sensor System [for 4 Sensor Type])

    A01XI3FE01

    1. Disconnect the I1 clearance warning ECU assembly connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      I1-3 (R1) - I1-5 (R2) R - W Ignition switch off 54 to 69 Ω
      I1-3 (R1) - I1-17 (E) R - W-B Ignition switch off 200 Ω or higher
      I1-5 (R2) - I1-17 (E) W - W-B Ignition switch off 200 Ω or higher
      I1-3 (R1) - G48-16 (BAT) R - GR Ignition switch off 6 kΩ or higher
      I1-5 (R2) - G48-16 (BAT) W - GR Ignition switch off 6 kΩ or higher