CAN COMMUNICATION SYSTEM(w/o Toyota Safety Sense) 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 branch wire.

      CAUTION:

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

      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.

      • 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 (for LHD)

      A01VIPNE02
      Text in Illustration
      *a to ECM (Sub Bus 15)*1 *b to ECM (V Bus)
      *c to Skid Control ECU (Brake Actuator Assembly) (V Bus) *d to Main Body ECU (Multiplex Network Body ECU) (V Bus)
      *e to Power Steering ECU Assembly (V Bus) *f to DLC3 (V Bus)
      *g to No. 2 Junction Connector (V Bus) *h to Engine Stop and Start ECU (V Bus)*2
      *i to Power Management Control ECU (Sub Bus 15)*1 - -
      Terminal No. (Symbol) Wiring Color Connect to
      A61-3 (CANH) B ECM (Sub Bus 15)*1
      A61-14 (CANL) W
      A61-9 (CANH) L ECM (V Bus)
      A61-20 (CANL) W
      A61-10 (CANH) G Skid Control ECU (Brake Actuator Assembly) (V Bus)
      A61-21 (CANL) W
      F82-1 (CANH) R Main Body ECU (Multiplex Network Body ECU) (V Bus)
      F82-12 (CANL) W
      F82-2 (CANH) LG Power Steering ECU Assembly (V Bus)
      F82-13 (CANL) W
      F82-3 (CANH) GR DLC3 (V Bus)
      F82-14 (CANL) W
      F82-4 (CANH) SB No. 2 Junction Connector (V Bus)
      F82-15 (CANL) W
      F82-5 (CANH) BE Engine Stop and Start ECU (V Bus)*2
      F82-16 (CANL) W
      F82-10 (CANH) Y Power Management Control ECU (Sub Bus 15)*1
      F82-21 (CANL) W

      • *1: for 1NR-FE

      • *2: w/ Stop and Start System

    2. NO. 1 JUNCTION CONNECTOR (for RHD)

      A01VLYVE02
      Text in Illustration
      *a to ECM (Sub Bus 15)*1 *b to ECM (V Bus)
      *c to Skid Control ECU (Brake Actuator Assembly) (V Bus) *d to Main Body ECU (Multiplex Network Body ECU) (V Bus)
      *e to No. 2 Junction Connector (V Bus) *f to Engine Stop and Start ECU (V Bus)*2
      *g to Power Management Control ECU (Sub Bus 15)*1 - -
      Terminal No. (Symbol) Wiring Color Connect to
      A61-3 (CANH) B ECM (Sub Bus 15)*1
      A61-14 (CANL) W
      A61-9 (CANH) L ECM (V Bus)
      A61-20 (CANL) W
      A61-10 (CANH) G Skid Control ECU (Brake Actuator Assembly) (V Bus)
      A61-21 (CANL) W
      F82-1 (CANH) R Main Body ECU (Multiplex Network Body ECU) (V Bus)
      F82-12 (CANL) W
      F82-4 (CANH) SB No. 2 Junction Connector (V Bus)
      F82-15 (CANL) W
      F82-5 (CANH) BE Engine Stop and Start ECU (V Bus)*2
      F82-16 (CANL) W
      F82-10 (CANH) Y Power Management Control ECU (Sub Bus 15)*1
      F82-21 (CANL) W

      • *1: for 1NR-FE

      • *2: w/ Stop and Start System

    3. NO. 2 JUNCTION CONNECTOR (for LHD)

      A01VIZJE02
      Text in Illustration
      *a to Steering Angle Sensor (Spiral Cable Sub-assembly) (V Bus)*1 *b to Certification ECU (smart key ECU assembly) (V Bus)*2
      *c to Center Airbag Sensor Assembly (V Bus) *d to Radio and Display Receiver Assembly (V Bus)*3
      *e to Combination Meter Assembly (V Bus) *f to Air Conditioning Amplifier Assembly (V Bus)*4
      *g to No. 1 Junction Connector (V Bus) - -
      Terminal No. (Symbol) Wiring Color Connect to
      F83-1 (CANH) P Steering Angle Sensor (Spiral Cable Sub-assembly) (V Bus)*1
      F83-12 (CANL) W
      F83-3 (CANH) L Certification ECU (smart key ECU assembly) (V Bus)*2
      F83-14 (CANL) W
      F83-4 (CANH) B Center Airbag Sensor Assembly (V Bus)
      F83-15 (CANL) W
      F83-5 (CANH) BE Radio and Display Receiver Assembly (V Bus)*3
      F83-16 (CANL) W
      F83-7 (CANH) G Combination Meter Assembly (V Bus)
      F83-18 (CANL) W
      F83-8 (CANH) V Air Conditioning Amplifier Assembly (V Bus)*4
      F83-19 (CANL) W
      F83-10 (CANH) SB No. 1 Junction Connector (V Bus)
      F83-21 (CANL) W

      • *1: w/ VSC

      • *2: w/ Entry and Start System

      • *3: w/ Display

      • *4: w/ Air Conditioning System or PTC Heater

    4. NO. 2 JUNCTION CONNECTOR (for RHD)

      A01VES7E02
      Text in Illustration
      *a to Steering Angle Sensor (Spiral Cable Sub-assembly) (V Bus)*1 *b to Certification ECU (Smart Key ECU) (V Bus)*2
      *c to Center Airbag Sensor Assembly (V1 Bus) *d to Radio and Display Receiver Assembly (V Bus)*3
      *e to Power Steering ECU Assembly (V Bus) *f to Combination Meter Assembly (V Bus)
      *g to Air Conditioning Amplifier Assembly (V Bus)*4 *h to No. 1 Junction Connector (V Bus)
      *i to DLC3 (V Bus) - -
      Terminal No. (Symbol) Wiring Color Connect to
      F83-1 (CANH) P Steering Angle Sensor (Spiral Cable Sub-assembly) (V Bus)*1
      F83-12 (CANL) W
      F83-3 (CANH) L Certification ECU (Smart Key ECU) (V Bus)*2
      F83-14 (CANL) W
      F83-4 (CANH) B Center Airbag Sensor Assembly (V Bus)
      F83-15 (CANL) W
      F83-5 (CANH) BE Radio and Display Receiver Assembly (V Bus)*3
      F83-16 (CANL) W
      F83-6 (CANH) LG Power Steering ECU Assembly (V Bus)
      F83-17 (CANL) W
      F83-7 (CANH) G Combination Meter Assembly (V Bus)
      F83-18 (CANL) W
      F83-8 (CANH) V Air Conditioning Amplifier Assembly (V Bus)*4
      F83-19 (CANL) W
      F83-10 (CANH) SB No. 1 Junction Connector (V Bus)
      F83-21 (CANL) W
      F83-11 (CANH) GR DLC3 (V Bus)
      F83-22 (CANL) W

      • *1: w/ VSC

      • *2: w/ Entry and Start System

      • *3: w/ Display

      • *4: w/ Air Conditioning System

  3. CHECK DLC3

    A01VJI6E03

    1. Turn the ignition switch off.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      F4-6 (CANH) - F4-14 (CANL) GR - W Ignition switch off 54 to 69 Ω
      F4-6 (CANH) - F4-16 (BAT) GR - BE Ignition switch off 6 kΩ or higher
      F4-14 (CANL) - F4-16 (BAT) W - BE Ignition switch off 6 kΩ or higher
      F4-6 (CANH) - F4-4 (CG) GR - W-B Ignition switch off 200 Ω or higher
      F4-14 (CANL) - F4-4 (CG) W - W-B Ignition switch off 200 Ω or higher

  4. CHECK ECM (for 1KR-FE)

    A01VKZ5E02

    1. Disconnect the A93 ECM connector.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      A93-26 (CANH) - A93-25 (CANL) L - W Ignition switch off 108 to 132 Ω
      A93-26 (CANH) - A93-2 (+B) L - B Ignition switch off 6 kΩ or higher
      A93-25 (CANL) - A93-2 (+B) W - B Ignition switch off 6 kΩ or higher
      A93-26 (CANH) - A93-4 (E1) L - W-B Ignition switch off 200 Ω or higher
      A93-25 (CANL) - A93-4 (E1) W - W-B Ignition switch off 200 Ω or higher

  5. CHECK ECM (for 1NR-FE)

    A01VGN2E02
    Text in Illustration
    *A for RHD *B for LHD

    1. Disconnect the A58 ECM and B23*1 or B22*2 ECM connectors.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      A58-13 (CANH) - A58-26 (CANL) L - W Ignition switch off 108 to 132 Ω
      A58-13 (CANH) - A58-2 (+B) L - B Ignition switch off 6 kΩ or higher
      A58-26 (CANL) - A58-2 (+B) W - B Ignition switch off 6 kΩ or higher

      A58-13 (CANH) - B23-16 (E1)*1

      A58-13 (CANH) - B22-16 (E1)*2

      		 L - W-B Ignition switch off 200 Ω or higher

      A58-26 (CANL) - B23-16 (E1)*1

      A58-26 (CANL) - B22-16 (E1)*2

      		 W - W-B Ignition switch off 200 Ω or higher
      for Sub Bus 15
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      A58-12 (CANP) - A58-25 (CANN) B - W Ignition switch off 108 to 132 Ω
      A58-12 (CANP) - A58-2 (+B) B - B Ignition switch off 6 kΩ or higher
      A58-25 (CANN) - A58-2 (+B) W - B Ignition switch off 6 kΩ or higher

      A58-12 (CANP) - B23-16 (E1)*1

      A58-12 (CANP) - B22-16 (E1)*2

      		 B - W-B Ignition switch off 200 Ω or higher

      A58-25 (CANN) - B23-16 (E1)*1

      A58-25 (CANN) - B22-16 (E1)*2

      		 W - W-B Ignition switch off 200 Ω or higher

    *1: for RHD

    *2: for LHD

  6. CHECK ECM (for 1ND-TV without DPF)

    A01VIY7E02

    1. Disconnect the A59 ECM connector.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      A59-3 (CANH) - A59-4 (CANL) L - W Ignition switch off 108 to 132 Ω
      A59-3 (CANH) - A59-1 (+B) L - B Ignition switch off 6 kΩ or higher
      A59-4(CANL) - A59-1 (+B) W - B Ignition switch off 6 kΩ or higher
      A59-3 (CANH) - A59-2 (E1) L - W-B Ignition switch off 200 Ω or higher
      A59-4 (CANL) - A59-2 (E1) W - W-B Ignition switch off 200 Ω or higher

  7. CHECK ECM (for 1ND-TV with DPF)

    A01VK40E02
    Text in Illustration
    *A for RHD *B for LHD

    1. Disconnect the A108 ECM connector.

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

      for V Bus
      Terminal No. (Symbol) Wiring color Switch Condition Specified Condition
      A108-26 (CANH) - A108-25 (CANL) L - W Ignition switch off 108 to 132 Ω
      A108-26 (CANH) - A108-2 (+B) L - B Ignition switch off 6 kΩ or higher
      A108-25 (CANL) - A108-2 (+B) W - B Ignition switch off 6 kΩ or higher
      A108-26 (CANH) - A108-4 (E1) L - W-B Ignition switch off 200 Ω or higher
      A108-25 (CANL) - A108-4 (E1) W - W-B Ignition switch off 200 Ω or higher

  8. CHECK POWER MANAGEMENT CONTROL ECU (for 1NR-FE)

    A01VHN1E02
    Text in Illustration
    *A w/ Stop and Start System *B w/o Stop and Start System

    1. Disconnect the F130*1 or F74*2 power management control ECU connector.

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

      for Sub Bus 15
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition

      F130-4 (CA3P) - F130-3 (CA3N)*1

      F74-4 (CA3P) - F74-3 (CA3N)*2

      		 Y - W Ignition switch off 108 to 132 Ω

      F130-4 (CA3P) - F130-8 (AM21)*1

      F74-4 (CA3P) - F74-8 (AM21)*2

      		 Y - BE Ignition switch off 6 kΩ or higher

      F130-3 (CA3N) - F130-8 (AM21)*1

      F74-3 (CA3N) - F74-8 (AM21)*2

      		 W - BE Ignition switch off 6 kΩ or higher

      F130-4 (CA3P) - F130-12 (GND)*1

      F74-4 (CA3P) - F74-12 (GND)*2

      		 Y - BR Ignition switch off 200 Ω or higher

      F130-3 (CA3N) - F130-12 (GND)*1

      F74-3 (CA3N) - F74-12 (GND)*2

      		 W - BR Ignition switch off 200 Ω or higher

      • *1: w/ Stop and Start System

      • *2: w/o Stop and Start System

  9. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU), INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    A01VENJE02
    Text in Illustration
    *A for LHD *B for RHD
    *1 Instrument Panel Junction Block Assembly *2 Main Body ECU (Multiplex Network Body ECU)

    1. Disconnect the F76 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the 3B and 3C instrument panel junction block assembly connectors.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      F76-14 (CANH) - F76-13 (CANL) R - W Ignition switch off 54 to 69 Ω
      F76-14 (CANH) - 3C-21 (BECU) R - L Ignition switch off 6 kΩ or higher
      F76-13 (CANL) - 3C-21 (BECU) W - L Ignition switch off 6 kΩ or higher
      F76-14 (CANH) - 3B-8 (GND1) R - W-B Ignition switch off 200 Ω or higher
      F76-13 (CANL) - 3B-8 (GND1) W - W-B Ignition switch off 200 Ω or higher

  10. CHECK COMBINATION METER ASSEMBLY

    A01VGSIE02

    1. Disconnect the F1 combination meter assembly connector.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      F1-32 (CANH) - F1-31 (CANL) G - W Ignition switch off 108 to 132 Ω
      F1-32 (CANH) - F1-40 (B) G - L Ignition switch off 6 kΩ or higher
      F1-31 (CANL) - F1-40 (B) W - L Ignition switch off 6 kΩ or higher
      F1-32 (CANH) - F1-21 (ET) G - W-B Ignition switch off 200 Ω or higher
      F1-31 (CANL) - F1-21 (ET) W - W-B Ignition switch off 200 Ω or higher

  11. CHECK SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

    A01VLEEE02
    Text in Illustration
    *A for LHD with CVT and RHD *B except LHD with CVT

    1. Disconnect the A78*1 or A79*2 skid control ECU (brake actuator assembly) connector.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition

      A78-23 (CANH) - A78-21 (CANL)*1

      A79-23 (CANH) - A79-21 (CANL)*2

      		 G - W Ignition switch off 54 to 69 Ω

      A78-23 (CANH) - A78-1 (+BS)*1

      A79-23 (CANH) - A79-1 (+BS)*2

      		 G - W Ignition switch off 6 kΩ or higher

      A78-21 (CANL) - A78-1 (+BS)*1

      A79-21 (CANL) - A79-1 (+BS)*2

      		 W - W Ignition switch off 6 kΩ or higher

      A78-23 (CANH) - A78-13 (GND1)*1

      A79-23 (CANH) - A79-13 (GND1)*2

      		 G - W-B Ignition switch off 200 Ω or higher

      A78-21 (CANL) - A78-13 (GND1)*1

      A79-21 (CANL) - A79-13 (GND1)*2

      		 W - W-B Ignition switch off 200 Ω or higher

      *1: for LHD with CVT and RHD

      *2: except LHD with CVT

  12. CHECK CENTER AIRBAG SENSOR ASSEMBLY

    A01VH97E02
    Text in Illustration
    *A w/o VSC *B w/ VSC

    1. Disconnect the F16 center airbag sensor assembly connector.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      F16-13 (CANH) - F16-22 (CANL) B - W Ignition switch off 54 to 69 Ω
      F16-13 (CANH) - F4-16 (BAT) B - BE Ignition switch off 6 kΩ or higher
      F16-22 (CANL) - F4-16 (BAT) W - BE Ignition switch off 6 kΩ or higher
      F16-13 (CANH) - F4-4 (CG) B - W-B Ignition switch off 200 Ω or higher
      F16-22 (CANL) - F4-4 (CG) W - W-B Ignition switch off 200 Ω or higher

  13. CHECK STEERING ANGLE SENSOR (SPIRAL CABLE SUB-ASSEMBLY) (w/ VSC)

    A01VGP5E01

    1. Disconnect the F30 steering angle sensor (spiral cable sub-assembly) connector.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      F30-4 (CANH) - F30-3 (CANL) P - W Ignition switch off 54 to 69 Ω
      F30-4 (CANH) - F30-6 (BAT) P - SB Ignition switch off 6 kΩ or higher
      F30-3 (CANL) - F30-6 (BAT) W - SB Ignition switch off 6 kΩ or higher
      F30-4 (CANH) - F30-2 (ESS) P - BR Ignition switch off 200 Ω or higher
      F30-3 (CANL) - F30-2 (ESS) W - BR Ignition switch off 200 Ω or higher

  14. CHECK POWER STEERING ECU ASSEMBLY

    A01VFT4E01

    1. Disconnect the A42 and F6 power steering ECU assembly connectors.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      F6-7 (CANH) - F6-8 (CANL) LG - W Ignition switch off 54 to 69 Ω
      F6-7 (CANH) - A42-1 (PIG) LG - W Ignition switch off 6 kΩ or higher
      F6-8 (CANL) - A42-1 (PIG) W - W Ignition switch off 6 kΩ or higher
      F6-7 (CANH) - A42-2 (PGND) LG - W-B Ignition switch off 200 Ω or higher
      F6-8 (CANL) - A42-2 (PGND) W - W-B Ignition switch off 200 Ω or higher

  15. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Entry and Start System)

    A01VHVTE01

    1. Disconnect the F63 and F65 certification ECU (smart key ECU assembly) connectors.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      F63-14 (CANH) - F63-15 (CANL) L - W Ignition switch off 54 to 69 Ω
      F63-14 (CANH) - F65-2 (+B) L - W Ignition switch off 6 kΩ or higher
      F63-15 (CANL) - F65-2 (+B) W - W Ignition switch off 6 kΩ or higher
      F63-14 (CANH) - F65-11 (E) L - BR Ignition switch off 200 Ω or higher
      F63-15 (CANL) - F65-11 (E) W - BR Ignition switch off 200 Ω or higher

  16. RADIO AND DISPLAY RECEIVER ASSEMBLY (w/ Display)

    A01VJNXE02

    1. Disconnect the F113 and F115 radio and display receiver assembly connectors.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      F115-9 (CANH) - F115-10 (CANL) BE - W Ignition switch off 54 to 69 Ω
      F115-9 (CANH) - F113-4 (+B1) BE - SB Ignition switch off 6 kΩ or higher
      F115-10 (CANL) - F113-4 (+B1) W - SB Ignition switch off 6 kΩ or higher
      F115-9 (CANH) - F113-7 (GND1) BE - BR Ignition switch off 200 Ω or higher
      F115-10 (CANL) - F113-7 (GND1) W - BR Ignition switch off 200 Ω or higher

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

    A01VLBAE01

    1. Disconnect the A91 and F131 engine stop and start ECU connectors.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition
      F131-15 (CANH) - F131-16 (CANL) BE - W Ignition switch off 54 to 69 Ω
      F131-15 (CANH) - A91-7 (BIN) BE - B Ignition switch off 6 kΩ or higher
      F131-16 (CANL) - A91-7 (BIN) W - B Ignition switch off 6 kΩ or higher
      F131-15 (CANH) - A91-8 (GND) BE - W-B Ignition switch off 200 Ω or higher
      F131-16 (CANL) - A91-8 (GND) W - W-B Ignition switch off 200 Ω or higher

  18. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (w/ Air Conditioning System or PTC Heater)

    A01VHOFE03
    Text in Illustration
    *A w/ Automatic Air Conditioning System *B w/ Manual Air Conditioning System or PTC Heater

    1. Disconnect the F42*1 or F41*2 air conditioning amplifier assembly connector.

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

      for V Bus
      Terminal No. (Symbol) Wiring Color Switch Condition Specified Condition

      F42-11 (TX+) - F42-12 (TX-)*1

      F41-8 (TX+) - F41-9 (TX-)*2

      		 V - W Ignition switch off 54 to 69 Ω

      F42-11 (TX+) - F42-21 (B)*1

      F41-8 (TX+) - F4-16 (BAT)*2

      		 V - BE Ignition switch off 6 kΩ or higher

      F42-12 (TX-) - F42-21 (B)*1

      F41-9 (TX-) - F4-16 (BAT)*2

      		 W - BE Ignition switch off 6 kΩ or higher

      F42-11 (TX+) - F42-14 (GND)*1

      F41-8 (TX+) - F41-23 (GND)*2

      		 V - W-B Ignition switch off 200 Ω or higher

      F42-12 (TX-) - F42-14 (GND)*1

      F41-9 (TX-) - F41-23 (GND)*2

      		 W - W-B Ignition switch off 200 Ω or higher

      • *1: w/ Automatic Air Conditioning System

      • *2: w/ Manual Air Conditioning System or PTC Heater