CAN COMMUNICATION SYSTEM (for LHD 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 main wire and the branch wire.

      CAUTION:

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

      A00JU6FE10
      Text in Illustration
      *a for No. 2 Junction Connector *b for ECM (for 2TR-FE) or No. 5 Junction Connector (for 5L-E)
      *c for Brake Actuator Assembly (Skid Control ECU) - -
      No. 1 Junction Connector Wiring Color Connect to
      A72-9 (CANH) R No. 2 junction connector
      A72-20 (CANL) W
      A72-10 (CANH) LG ECM*1 or No. 5 junction connector*2
      A72-21 (CANL) W
      A72-11 (CANH) B Brake actuator assembly (skid control ECU)
      A72-22 (CANL) W

      • *1: for 2TR-FE

      • *2: for 5L-E

    2. NO. 2 JUNCTION CONNECTOR

      A00JU6FE11
      Text in Illustration
      *a for No. 3 Junction Connector *b for Four Wheel Drive Control ECU
      *c for Air Conditioning Amplifier Assembly *d for Power Steering ECU Assembly (for 2TR-FE)
      *d for No. 1 Junction Connector - -
      No. 2 Junction Connector Wiring Color Connect to
      G97-1 (CANH) GR No. 3 junction connector
      G97-12 (CANL) W
      G97-2 (CANH) G Four wheel drive control ECU
      G97-13 (CANL) W
      G97-4 (CANH) BR Air conditioning amplifier assembly
      G97-15 (CANL) W
      G97-5 (CANH) L Power steering ECU assembly*
      G97-16 (CANL) W
      G97-6 (CANH) R No. 1 junction connector
      G97-17 (CANL) W

      • *: for 2TR-FE

    3. NO. 3 JUNCTION CONNECTOR

      A00JU6FE12
      Text in Illustration
      *a for No. 2 Junction Connector *b for Display and Navigation Module Display (AVN) [w/ Navigation System]
      *c for Spiral Cable Sub-assembly (Steering Angle Sensor) [w/ Vehicle Stability Control System {for Vacuum Brake Booster}] *d for Yaw Rate Sensor Assembly
      *e for Center Airbag Sensor Assembly *f for No. 4 Junction Connector
      No. 3 Junction Connector Wiring Color Connect to
      G100-1 (CANH) GR No. 2 junction connector
      G100-12 (CANL) W
      G100-2 (CANH) P Display and navigation module display (AVN)*1
      G100-13 (CANL) W
      G100-3 (CANH) G Spiral cable sub-assembly (steering angle sensor)*2
      G100-14 (CANL) W
      G100-4 (CANH) R Yaw rate sensor assembly
      G100-15 (CANL) W
      G100-5 (CANH) Y Center airbag sensor assembly
      G100-16 (CANL) W
      G100-6 (CANH) LG No. 4 junction connector
      G100-17 (CANL) W

      • *1: w/ Navigation System

      • *2: w/ Vehicle Stability Control System (for Vacuum Brake Booster)

    4. NO. 4 JUNCTION CONNECTOR

      A00JU6FE13
      Text in Illustration
      *a for No. 3 Junction Connector *b for Combination Meter Assembly
      *c for Main Body ECU (Multiplex Network Body ECU) *d for DLC3
      No. 4 Junction Connector Wiring Color Connect to
      G94-1 (CANH) LG No. 3 junction connector
      G94-12 (CANL) W
      G94-2 (CANH) V Combination meter assembly
      G94-13 (CANL) W
      G94-3 (CANH) L Main body ECU (multiplex network body ECU)
      G94-14 (CANL) W
      G94-5 (CANH) R DLC3
      G94-16 (CANL) W
    5. A00K23GE16
      Text in Illustration
      *a for No. 1Junction Connector

      NO. 5 JUNCTION CONNECTOR (for 5L-E)

      No. 5 Junction Connector Wiring Color Connect to
      G101-2 (CANL) W No. 1 junction connector
      G101-3 (CANH) LG

  3. CHECK DLC3


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

      CAUTION:

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

      Note

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

    2. A00JWSAE74

      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 2TR-FE)

    A00JUVWE03

    1. Disconnect the G59, G60 and C64 ECM connectors.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      G60-34 (CANH) - G60-33 (CANL) LG - W Ignition switch off 108 to 132 Ω
      G60-34 (CANH) - C64-5 (E1) LG - BR Ignition switch off 200 Ω or higher
      G60-33 (CANL) - C64-5 (E1) W - BR Ignition switch off 200 Ω or higher
      G60-34 (CANH) -G59-17 (BATT) LG - L Ignition switch off 6 kΩ or higher
      G60-33 (CANL) - G59-17 (BATT) W - L Ignition switch off 6 kΩ or higher

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

    A00JY8KE16

    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

  6. CHECK COMBINATION METER ASSEMBLY

    A00JVCUE16

    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) V - W Ignition switch off 108 to 132 Ω
      G6-40 (CANH) - G6-1 (EP) V - W-B Ignition switch off 200 Ω or higher
      G6-39 (CANL) - G6-1 (EP) W - W-B Ignition switch off 200 Ω or higher
      G6-40 (CANH) - G6-26 (B) V - L Ignition switch off 6 kΩ or higher
      G6-39 (CANL) - G6-26 (B) W - L Ignition switch off 6 kΩ or higher

  7. CHECK POWER STEERING ECU ASSEMBLY (for 2TR-FE)

    A00JU09E04

    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

  8. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

    A00JZAAE01

    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

  9. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    A00JVNBE06

    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

  10. CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

    A00K0K8E01

    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) B - W Ignition switch off 54 to 69 Ω
      A6-25 (CANH) - A6-1 (GND1) B - 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) B - B Ignition switch off 6 kΩ or higher
      A6-14 (CANL) - A6-24 (+BM) W - B Ignition switch off 6 kΩ or higher

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

    A00K1J9E04

    1. 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

  12. CHECK YAW RATE SENSOR ASSEMBLY

    A00K1QXE03

    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

  13. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY (AVN) (w/ Navigation System)

    A00JWQ0E01

    1. Disconnect the H4 display and navigation module display (AVN) connector.

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

      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      H4-21 (CANH) - H4-22 (CANL) W - P Ignition switch off 54 to 69 Ω
      H4-21 (CANH) - H4-10 (GND1) W - BR Ignition switch off 200 Ω or higher
      H4-22 (CANL) - H4-10 (GND1) P - BR Ignition switch off 200 Ω or higher
      H4-21 (CANH) - H4-1 (+B1) W - SB Ignition switch off 6 kΩ or higher
      H4-22 (CANL) - H4-1 (+B1) P - SB Ignition switch off 6 kΩ or higher

  14. CHECK FOUR WHEEL DRIVE CONTROL ECU

    A00JWECE03

    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