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Inspection Procedure

  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 prevent airbag and seat belt pretensioner activation.
      NOTE:
      • After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
      • When disconnecting the cable, some systems need to be initialized after the cable is reconnected (see INITIALIZATION ).
  2. CHECK CAN BUS WIRE (MAIN WIRE FOR DISCONNECTION, BUS LINES FOR SHORT CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition Resistance of Malfunction
      A13-12 (CA1H) - A13-11 (CA1L) Engine switch off 54 to 69 Ω Below 53 Ω: Short in line
      Engine switch off 70 Ω or higher: Open in CAN main bus line
      A13-12 (CA1H) - A14-7 (BATT) Engine switch off 6 kΩ or higher Below 6 kΩ: +B short
      A13-11 (CA1L) - A14-7 (BATT) Engine switch off 6 kΩ or higher Below 6 kΩ: +B short
      A13-12 (CA1H) - E3-1 (E1) Engine switch off 200 Ω or higher Below 200 Ω: Ground short
      A13-11 (CA1L) - E3-1 (E1) Engine switch off 200 Ω or higher Below 200 Ω: Ground short
      Fig 1: Identifying ECM Connector Terminals
      G04953554Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT REFERENCE

      Result Proceed to
      NG
      • Open in CAN main wire
      		 A
      NG
      • Short in line
      • +B short
      • Ground short
      		 B
      OK C

      B:  Go to step  18

      C:  Go to step  54

      A: Go to next step 

  3. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - ECM) 
    1. Disconnect the L97 No. 2 junction connector connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      L97-11 (CANH) - L97-22 (CANL) Engine switch off 108 to 132 Ω
      Fig 2: Identifying L97 No. 2 Junction Connector Terminals
      G04953555Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG:  Go to step  5

      OK: Go to next step 

  4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - POWER STEERING ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      L97-10 (CANH) - L97-21 (CANL) Engine switch off 108 to 132 Ω
      Fig 3: Identifying L97 No. 2 Junction Connector Terminals
      G04953556Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG:  Go to step  10

      OK: REPLACE NO. 2 JUNCTION CONNECTOR 

  5. CONNECT CONNECTOR 
    1. Reconnect the L97 No. 2 junction connector connector.
  6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - ECM) 
    1. Disconnect the A67 No. 1 junction connector connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      A67-3 (CANH) - A67-14 (CANL) Engine switch off 108 to 132 Ω
      Fig 4: Identifying A67 No. 1 Junction Connector Terminal
      G06198642Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG:  Go to step  8

      OK: Go to next step 

  7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      A67-1 (CANH) - A67-12 (CANL) Engine switch off 108 to 132 Ω
      Fig 5: Identifying A67 No. 1 Junction Connector Terminals
      G04953558Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) 

      OK: REPLACE NO. 1 JUNCTION CONNECTOR 

  8. CONNECT CONNECTOR 
    1. Reconnect the A67 No. 1 junction connector connector.
  9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 1 JUNCTION CONNECTOR) 
    1. Disconnect the A13 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      A13-12 (CA1H) - A13-11 (CA1L) Engine switch off 108 to 132 Ω
      Fig 6: Identifying A13 ECM Connector Terminals
      G04953559Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 1 JUNCTION CONNECTOR) 

      OK: REPLACE ECM  (See REMOVAL )

  10. CONNECT CONNECTOR 
    1. Reconnect the L97 No. 2 junction connector connector.
  11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 5 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) 
    1. Disconnect the L99 No. 5 junction connector connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      L99-3 (CANH) - L99-14 (CANL) Engine switch off 108 to 132 Ω
      Fig 7: Identifying L99 No. 5 Junction Connector Terminals
      G04953560Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG:  Go to step  15

      OK: Go to next step 

  12. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 5 JUNCTION CONNECTOR - POWER STEERING ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      L99-4 (CANH) - L99-15 (CANL) Engine switch off 108 to 132 Ω
      Fig 8: Identifying L99 No. 5 Junction Connector Terminals
      G04953561Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: Go to step 13 

      OK: REPLACE NO. 5 JUNCTION CONNECTOR 

  13. CONNECT CONNECTOR 
    1. Reconnect the L99 No. 5 junction connector connector.
  14. CHECK FOR OPEN IN CAN BUS MAIN WIRE (POWER STEERING ECU - NO. 5 JUNCTION CONNECTOR) 
    1. Disconnect the A44 power steering ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      A44-2 (CA1H) - A44-3 (CA1L) Engine switch off 108 to 132 Ω
      Fig 9: Identifying A44 Power Steering ECU Connector Terminals
      G04953562Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER STEERING ECU (POWER STEERING ECU - NO. 5 JUNCTION CONNECTOR) 

      OK: REPLACE POWER STEERING ECU  (See REMOVAL )

  15. CONNECT CONNECTOR 
    1. Reconnect the L99 No. 5 junction connector connector.
  16. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR) 
    1. Disconnect the S58 No. 4 junction connector connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      S58-2 (CANH) - S58-13 (CANL) Engine switch off 108 to 132 Ω
      Fig 10: Identifying S58 No. 4 Junction Connector Terminals
      G04953563Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR) 

      OK: Go to next step 

  17. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 4 JUNCTION CONNECTOR - NO. 5 JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      S58-1 (CANH) - S58-12 (CANL) Engine switch off 108 to 132 Ω
      Fig 11: Identifying S58 No. 4 Junction Connector Terminals
      G04953564Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 5 JUNCTION CONNECTOR) 

      OK: REPLACE NO. 4 JUNCTION CONNECTOR 

  18. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 5 JUNCTION CONNECTOR SIDE) 
    1. Disconnect the L99 No. 5 junction connector connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      A13-12 (CA1H) - A13-11 (CA1L) Engine switch off 108 to 132 Ω
      A13-12 (CA1H) - L31-4 (CG) Engine switch off 200 Ω or higher
      A13-11 (CA1L) - L31-4 (CG) Engine switch off 200 Ω or higher
      A13-12 (CA1H) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A13-11 (CA1L) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      Fig 12: Identifying A13 ECM Connector Terminals
      G04953565Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG:  Go to step  28

      OK: Go to next step 

  19. CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - SUSPENSION CONTROL ECU) 
    NOTE: For vehicles without air suspension system, go to " 20 CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - STEERING CONTROL ECU)".
    1. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      L99-1 (CANH) - L99-12 (CANL) Engine switch off 1 Ω or higher OK
      L99-1 (CANH) - L99-12 (CANL) Engine switch off Below 1 Ω NG
      L99-1 (CANH) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L99-12 (CANL) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L99-1 (CANH) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L99-12 (CANL) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L99-1 (CANH) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L99-12 (CANL) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L99-1 (CANH) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      L99-12 (CANL) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 13: Identifying L99 No. 5 Junction Connector Terminals
      G04953566Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG:  Go to step  22

      OK: Go to next step 

  20. CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - STEERING CONTROL ECU) 
    NOTE: For vehicles without variable gear ratio steering system, go to " 21 CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - POWER STEERING ECU)".
    1. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      L99-5 (CANH) - L99-16 (CANL) Engine switch off 1 Ω or higher OK
      L99-5 (CANH) - L99-16 (CANL) Engine switch off Below 1 Ω NG
      L99-5 (CANH) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L99-16 (CANL) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L99-5 (CANH) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L99-16 (CANL) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L99-5 (CANH) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L99-16 (CANL) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L99-5 (CANH) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      L99-16 (CANL) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 14: Identifying L99 No. 5 Junction Connector Terminals
      G04953567Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG:  Go to step  24

      OK: Go to next step 

  21. CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - POWER STEERING ECU) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 15: Identifying L99 No. 5 Junction Connector Terminals
      G04953568Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      L99-4 (CANH) - L99-15 (CANL) Engine switch off 1 Ω or higher OK
      L99-4 (CANH) - L99-15 (CANL) Engine switch off Below 1 Ω NG
      L99-4 (CANH) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L99-15 (CANL) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L99-4 (CANH) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L99-15 (CANL) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L99-4 (CANH) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L99-15 (CANL) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L99-4 (CANH) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      L99-15 (CANL) - L31-16 (BAT) Engine switch off Below 1 Ω NG

      NG:  Go to step  26

      OK: REPAIR OR REPLACE NO. 5 JUNCTION CONNECTOR 

  22. CONNECT CONNECTOR 
    1. Reconnect the L99 No. 5 junction connector connector.
  23. CHECK FOR SHORT IN CAN BUS WIRES (SUSPENSION CONTROL ECU) 
    1. Disconnect the L88 suspension control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      L88-7 (CANH) - L88-8 (CANL) Engine switch off 1 Ω or higher OK
      L88-7 (CANH) - L88-8 (CANL) Engine switch off Below 1 Ω NG
      L88-7 (CANH) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L88-8 (CANL) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L88-7 (CANH) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L88-8 (CANL) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L88-7 (CANH) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L88-8 (CANL) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L88-7 (CANH) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      L88-8 (CANL) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 16: Identifying L88 Suspension Control ECU Connector Terminals
      G04953569Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SUSPENSION CONTROL ECU (CANH, CANL) 

      OK: REPLACE SUSPENSION CONTROL ECU  (See REMOVAL )

  24. CONNECT CONNECTOR 
    1. Reconnect the L99 No. 5 junction connector connector.
  25. CHECK FOR SHORT IN CAN BUS WIRES (STEERING CONTROL ECU) 
    1. Disconnect the A41 steering control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      A41-9 (CA1H) - A41-20 (CA1L) Engine switch off 1 Ω or higher OK
      A41-9 (CA1H) - A41-20 (CA1L) Engine switch off Below 1 Ω NG
      A41-9 (CA1H) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A41-20 (CA1L) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A41-9 (CA1H) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A41-20 (CA1L) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A41-9 (CA1H) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A41-20 (CA1L) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A41-9 (CA1H) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      A41-20 (CA1L) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 17: Identifying A41 Steering Control ECU Connector Terminals
      G04953570Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO STEERING CONTROL ECU (CA1H, CA1L) 

      OK: REPLACE STEERING CONTROL ECU  (See REMOVAL )

  26. CONNECT CONNECTOR 
    1. Reconnect the L99 No. 5 junction connector connector.
  27. CHECK FOR SHORT IN CAN BUS WIRES (POWER STEERING ECU) 
    1. Disconnect the A44 power steering ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      A44-2 (CA1H) - A44-3 (CA1L) Engine switch off 1 Ω or higher OK
      A44-2 (CA1H) - A44-3 (CA1L) Engine switch off Below 1 Ω NG
      A44-2 (CA1H) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A44-3 (CA1L) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A44-2 (CA1H) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A44-3 (CA1L) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A44-2 (CA1H) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A44-3 (CA1L) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A44-2 (CA1H) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      A44-3 (CA1L) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 18: Identifying A44 And L31 Connector Terminals
      G04953571Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER STEERING ECU (NO. 5 JUNCTION CONNECTOR - POWER STEERING ECU) 

      OK: REPLACE POWER STEERING ECU  (See REMOVAL )

  28. CONNECT CONNECTOR 
    1. Reconnect the L99 No. 5 junction connector connector.
  29. CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR) 
    1. Disconnect the S58 No. 4 junction connector connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      S58-1 (CANH) - S58-12 (CANL) Engine switch off 108 to 132 Ω
      S58-1 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      S58-12 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      S58-1 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      S58-12 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      Fig 19: Identifying S58 No. 4 Junction Connector Terminals
      G04953572Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 5 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR) 

      OK: Go to next step 

  30. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR SIDE) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      A13-12 (CA1H) - A13-11 (CA1L) Engine switch off 108 to 132 Ω
      A13-12 (CA1H) - L31-4 (CG) Engine switch off 200 Ω or higher
      A13-11 (CA1L) - L31-4 (CG) Engine switch off 200 Ω or higher
      A13-12 (CA1H) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A13-11 (CA1L) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      Fig 20: Identifying A13 ECM Connector Terminals
      G04953573Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT REFERENCE

      Result Proceed to
      NG A
      OK (w/ Pre-collision System) B
      OK (w/o Pre-collision System) C

      B:  Go to step  51

      C: REPAIR OR REPLACE NO. 4 JUNCTION CONNECTOR 

      A: Go to next step 

  31. CONNECT CONNECTOR 
    1. Reconnect the S58 No. 4 junction connector connector.
  32. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) 
    1. Disconnect the L97 No. 2 junction connector connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      L97-10 (CANH) - L97-21 (CANL) Engine switch off 108 to 132 Ω
      L97-10 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      L97-21 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      L97-10 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      L97-21 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      Fig 21: Identifying L97 No. 2 Junction Connector Terminals
      G04953574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) 

      OK: Go to next step 

  33. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR SIDE) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      A13-12 (CA1H) - A13-11 (CA1L) Engine switch off 108 to 132 Ω
      A13-12 (CA1H) - L31-4 (CG) Engine switch off 200 Ω or higher
      A13-11 (CA1L) - L31-4 (CG) Engine switch off 200 Ω or higher
      A13-12 (CA1H) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A13-11 (CA1L) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      Fig 22: Identifying A13 ECM Connector Terminals
      G04953565Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG:  Go to step  40

      OK: Go to next step 

  34. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - YAW RATE SENSOR) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 23: Identifying L97 No. 2 Junction Connector Terminals
      G04953576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      L97-9 (CANH) - L97-20 (CANL) Engine switch off 1 Ω or higher OK
      L97-9 (CANH) - L97-20 (CANL) Engine switch off Below 1 Ω NG
      L97-9 (CANH) - L31-4 (CG) Engine switch off 1Ω or higher OK
      L97-20 (CANL) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L97-9 (CANH) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L97-20 (CANL) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L97-9 (CANH) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L97-20 (CANL) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L97-9 (CANH) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      L97-20 (CANL) - L31-16 (BAT) Engine switch off Below 1 Ω NG

      NG:  Go to step  36

      OK: Go to next step 

  35. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - STEERING ANGLE SENSOR) 
    1. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      L97-8 (CANH) - L97-19 (CANL) Engine switch off 1 Ω or higher OK
      L97-8 (CANH) - L97-19 (CANL) Engine switch off Below 1 Ω NG
      L97-8 (CANH) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L97-19 (CANL) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L97-8 (CANH) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L97-19 (CANL) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L97-8 (CANH) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L97-19 (CANL) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L97-8 (CANH) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      L97-19 (CANL) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 24: Identifying L97 No. 2 Junction Connector Terminals
      G04953577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG:  Go to step  38

      OK: REPAIR OR REPLACE NO. 2 JUNCTION CONNECTOR 

  36. CONNECT CONNECTOR 
    1. Reconnect the L97 No. 2 junction connector connector.
  37. CHECK FOR SHORT IN CAN BUS WIRES (YAW RATE SENSOR) 
    1. Disconnect the L71 yaw rate sensor connector.
    2. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      L71-3 (CA1H) - L71-2 (CA1L) Engine switch off 1 Ω or higher OK
      L71-3 (CA1H) - L71-2 (CA1L) Engine switch off Below 1 Ω NG
      L71-3 (CA1H) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L71-2 (CA1L) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L71-3 (CA1H) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L71-2 (CA1L) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L71-3 (CA1H) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L71-2 (CA1L) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L71-3 (CA1H) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      L71-2 (CA1L) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 25: Identifying L71 Yaw Rate Sensor Connector Terminals
      G04953578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO YAW RATE SENSOR (CA1H, CA1L) 

      OK: REPLACE YAW RATE SENSOR  (See REMOVAL )

  38. CONNECT CONNECTOR 
    1. Reconnect the L97 No. 2 junction connector connector.
  39. CHECK FOR SHORT IN CAN BUS WIRES (STEERING ANGLE SENSOR) 
    1. Disconnect the L21 steering angle sensor connector.
    2. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      L21-10 (CA1H) - L21-9 (CA1L) Engine switch off 1 Ω or higher OK
      L21-10 (CA1H) - L21-9 (CA1L) Engine switch off Below 1 Ω NG
      L21-10 (CA1H) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L21-9 (CA1L) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      L21-10 (CA1H) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L21-9 (CA1L) - L31-4 (CG) Engine switch off Below 1 Ω NG
      L21-10 (CA1H) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L21-9 (CA1L) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      L21-10 (CA1H) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      L21-9 (CA1L) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 26: Identifying L21 Steering Angle Sensor Connector Terminals
      G04953579Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO STEERING ANGLE SENSOR (CA1H, CA1L) 

      OK: REPLACE STEERING ANGLE SENSOR  (See REMOVAL )

  40. CONNECT CONNECTOR 
    1. Reconnect the L97 No. 2 junction connector connector.
  41. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR) 
    1. Disconnect the A67 No. 1 junction connector connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Switch Condition Specified Condition
      A67-1 (CANH) - A67-12 (CANL) Engine switch off 108 to 132 Ω
      A67-1 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      A67-12 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      A67-1 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A67-12 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      Fig 27: Identifying A67 No. 1 Junction Connector Terminals
      G04953580Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR) 

      OK: Go to next step 

  42. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - SKID CONTROL ECU) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 28: Identifying A67 No. 1 Junction Connector Terminals
      G04953581Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      A67-2 (CANH) - A67-13 (CANL) Engine switch off 1 Ω or higher OK
      A67-2 (CANH) - A67-13 (CANL) Engine switch off Below 1 Ω NG
      A67-2 (CANH) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A67-13 (CANL) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A67-2 (CANH) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A67-13 (CANL) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A67-2 (CANH) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A67-13 (CANL) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A67-2 (CANH) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      A67-13 (CANL) - L31-16 (BAT) Engine switch off Below 1 Ω NG

      NG:  Go to step  45

      OK: Go to next step 

  43. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - DRIVING SUPPORT ECU) 
    NOTE: For vehicles without dynamic radar cruise control system or pre-collision system, go to " 44 CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - ECM)".
    1. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      A67-4 (CANH) - A67-15 (CANL) Engine switch off 1 Ω or higher OK
      A67-4 (CANH) - A67-15 (CANL) Engine switch off Below 1 Ω NG
      A67-4 (CANH) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A67-15 (CANL) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A67-4 (CANH) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A67-15 (CANL) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A67-4 (CANH) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A67-15 (CANL) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A67-4 (CANH) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      A67-15 (CANL) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 29: Identifying A67 No. 1 Junction Connector Terminals
      G04953582Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG:  Go to step  47

      OK: Go to next step 

  44. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      A67-3 (CANH) - A67-14 (CANL) Engine switch off 1 Ω or higher OK
      A67-3 (CANH) - A67-14 (CANL) Engine switch off Below 1 Ω NG
      A67-3 (CANH) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A67-14 (CANL) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A67-3 (CANH) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A67-14 (CANL) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A67-3 (CANH) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A67-14 (CANL) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A67-3 (CANH) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      A67-14 (CANL) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 30: Identifying A67 No. 1 Junction Connector Terminals
      G04953583Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG:  Go to step  49

      OK: REPAIR OR REPLACE NO. 1 JUNCTION CONNECTOR 

  45. CONNECT CONNECTOR 
    1. Reconnect the A67 No. 1 junction connector connector.
  46. CHECK FOR SHORT IN CAN BUS WIRES (SKID CONTROL ECU) 
    1. Disconnect the A21 skid control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      A21-30 (CA1H) - A21-29 (CA1L) Engine switch off 1 Ω or higher OK
      A21-30 (CA1H) - A21-29 (CA1L) Engine switch off Below 1 Ω NG
      A21-30 (CA1H) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A21-29 (CA1L) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A21-30 (CA1H) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A21-29 (CA1L) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A21-30 (CA1H) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A21-29 (CA1L) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A21-30 (CA1H) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      A21-29 (CA1L) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 31: Identifying A21 Skid Control ECU Connector Terminals
      G04953584Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SKID CONTROL ECU (CA1H, CA1L) 

      OK: REPLACE SKID CONTROL ECU  (See REMOVAL )

  47. CONNECT CONNECTOR 
    1. Reconnect the A67 No. 1 junction connector connector.
  48. CHECK FOR SHORT IN CAN BUS WIRES (DRIVING SUPPORT ECU) 
    1. Disconnect the A33 driving support ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      A33-1 (CA1H) - A33-2 (CA1L) Engine switch off 1 Ω or higher OK
      A33-1 (CA1H) - A33-2 (CA1L) Engine switch off Below 1 Ω NG
      A33-1 (CA1H) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A33-2 (CA1L) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A33-1 (CA1H) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A33-2 (CA1L) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A33-1 (CA1H) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A33-2 (CA1L) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A33-1 (CA1H) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      A33-2 (CA1L) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 32: Identifying A33 Driving Support ECU Connector Terminals
      G04953585Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DRIVING SUPPORT ECU (CA1H, CA1L) 

      OK: REPLACE DRIVING SUPPORT ECU  (See REMOVAL )

  49. CONNECT CONNECTOR 
    1. Reconnect the A67 No. 1 junction connector connector.
  50. CHECK FOR SHORT IN CAN BUS WIRES (ECM) 
    1. Disconnect the A13 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      A13-12 (CA1H) - A13-11 (CA1L) Engine switch off 1 Ω or higher OK
      A13-12 (CA1H) - A13-11 (CA1L) Engine switch off Below 1 Ω NG
      A13-12 (CA1H) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A13-11 (CA1L) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      A13-12 (CA1H) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A13-11 (CA1L) - L31-4 (CG) Engine switch off Below 1 Ω NG
      A13-12 (CA1H) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A13-11 (CA1L) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      A13-12 (CA1H) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      A13-12 (CA1H) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 33: Identifying A13 ECM Connector Terminals
      G04953586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (NO. 1 JUNCTION CONNECTOR - ECM) 

      OK: REPLACE ECM  (See REMOVAL )

  51. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - SEAT BELT CONTROL ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      S58-3 (CANH) - S58-14 (CANL) Engine switch off 1 Ω or higher OK
      S58-3 (CANH) - S58-14 (CANL) Engine switch off Below 1 Ω NG
      S58-3 (CANH) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      S58-14 (CANL) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      S58-3 (CANH) - L31-4 (CG) Engine switch off Below 1 Ω NG
      S58-14 (CANL) - L31-4 (CG) Engine switch off Below 1 Ω NG
      S58-3 (CANH) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      S58-14 (CANL) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      S58-3 (CANH) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      S58-14 (CANL) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 34: Identifying S58 No. 4 Junction Connector Terminals
      G04953587Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: Go to step 52 

      OK: REPAIR OR REPLACE NO. 4 JUNCTION CONNECTOR 

  52. CONNECT CONNECTOR 
    1. Reconnect the S58 No. 4 junction connector connector.
  53. CHECK FOR SHORT IN CAN BUS WIRES (SEAT BELT CONTROL ECU) 
    1. Disconnect the S47 seat belt control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Result 

      RESULT REFERENCE

      Tester Connection Switch Condition Measured Resistance Proceed to
      S47-1 (CANH) - S47-2 (CANL) Engine switch off 1 Ω or higher OK
      S47-1 (CANH) - S47-2 (CANL) Engine switch off Below 1 Ω NG
      S47-1 (CANH) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      S47-2 (CANL) - L31-4 (CG) Engine switch off 1 Ω or higher OK
      S47-1 (CANH) - L31-4 (CG) Engine switch off Below 1 Ω NG
      S47-2 (CANL) - L31-4 (CG) Engine switch off Below 1 Ω NG
      S47-1 (CANH) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      S47-2 (CANL) - L31-16 (BAT) Engine switch off 1 Ω or higher OK
      S47-1 (CANH) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      S47-2 (CANL) - L31-16 (BAT) Engine switch off Below 1 Ω NG
      Fig 35: Identifying S47 Seat Belt Control ECU Connector Terminals
      G04953588Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SEAT BELT CONTROL ECU (CANH, CANL) 

      OK: REPLACE SEAT BELT CONTROL ECU  (See REMOVAL )

  54. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BATTERY AND BODY GROUND) 
    1. Connect the cable to the negative (-) battery terminal.
      NOTE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected (see INITIALIZATION ).
    2. Disconnect the A19 and A21 skid control ECU connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      A19-1 (GND) - Body ground Always Below 1 Ω
      A21-1 (GND4) - Body ground Always Below 1 Ω
    4. Measure the voltage according to the value(s) in the table below.
      Fig 36: Identifying A19 And A21 Skid Control ECU Connectors Terminals
      G04953589Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      A19-43 (+BI1) - Body ground Always 11 to 14 V
      A21-38 (+BI2) - Body ground Always 11 to 14 V
      A19-29 (+BI3) - Body ground Always 11 to 14 V
      A21-22 (+BI4) - Body ground Always 11 to 14 V
      A19-46 (IG1) - Body ground Engine switch on (IG) 11 to 14 V
      A21-46 (IG2) - Body ground Engine switch on (IG) 11 to 14 V

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE SKID CONTROL ECU  (See REMOVAL )

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