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Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR CAN BUS WIRE (MAIN BUS WIRE, BUS WIRES, DLC3 BRANCH WIRE) 
    1. Turn the ignition switch to the LOCK position.
      Fig 1: Identifying DLC3 Connector Terminals
      G05275073Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the values in the table below.

      Result 

      RESULT TABLE

      Tester connection Condition Specified condition Proceed to
      D1-6 (CANH) - D1-14 (CANL) Ignition switch off 54 to 69 Ω OK
      D1-6 (CANH) - D1-14 (CANL) Ignition switch off 69 Ω or higher N6-A
      D1-6 (CANH) - D1-14 (CANL) Ignition switch off 54 Ω or less NG-B

    NG-A: CHECK FOR CAN MAIN BUS LINE FOR DISCONNECTION 

    NG-B: CHECK CAN BUS LINES FOR SHORT CIRCUIT 

    OK: Go to Next Step 

  2. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CAN-H) 
    1. Measure the resistance according to the value in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION TABLE

      Tester connection Condition Specified value
      D1-6 (CANH) - D1-16 (BAT) Ignition switch off 6 kΩ or higher
      Fig 2: Identifying DLC3 Connector Terminals
      G05275080Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: CHECK CAN BUS LINE (CAN-H) FOR SHORT TO +B 

    OK: Go to Next Step 

  3. CHECK FOR SHORT TO B+ IN CAN BUS WIRE (CAN-L) 
    1. Measure the resistance according to the value in the table below.
      Fig 3: Identifying DLC3 Connector Terminals
      G05275081Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      RESISTANCE SPECIFICATION TABLE

      Tester connection Condition Specified value
      D1-14 (CANL) - D1-16 (BAT) Ignition switch off 6 kΩ or higher

    NG: CHECK CAN BUS LINE (CAN-L) FOR SHORT TO +B 

    OK: Go to Next Step 

  4. CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN-H) 
    1. Measure the resistance according to the value in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION TABLE

      Tester connection Condition Specified value
      01-4 (CG) - D1-6 (CANH) Ignition switch off 200 Ω or higher
      Fig 4: Identifying DLC3 Connector Terminals
      G05275082Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: CHECK CAN BUS LINE (CAN-H) FOR SHORT TO GND 

    OK: Go to Next Step 

  5. CHECK FOR SHORT TO GND IN CAN BUS WIRE (CAN-L) 
    1. Measure the resistance according to the value in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION TABLE

      Tester connection Condition Specified value
      D1-4 (CG) - D1-14 (CANL) Ignition switch off 200 Ω or higher
      Fig 5: Identifying DLC3 Connector Terminals
      G05275083Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: CHECK CAN BUS LINE (CAN-L) FOR SHORT TO GND 

    OK: GO TO  HOW TO PROCEED WITH TROUBLESHOOTING  

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