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Inspection Procedure

WARNING: This page is about a different car, the 2008 Scion xB. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
  • After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
  • Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.

    HINT:

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

  1. CHECK CAN BUS WIRE (MAIN WIRE FOR DISCONNECTION, CAN BUS LINES FOR SHORT CIRCUIT) 
    1. Turn the ignition switch off.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE CHART

      Tester Connection Switch Condition Specified Condition Proceed to
      C14-6 (CANH) - C14-14 (CANL) Ignition switch off 54 to 69 Ω OK
      C14-6 (CANH) - C14-14 (CANL) Ignition switch off 69 Ω or higher NG-A
      C14-6 (CANH) - C14-14 (CANL) Ignition switch off 54 Ω or less NG-B
      3. Fig 1: Identifying CANH And CANL Terminals Of DLC3 Connector
      G05392056Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG-A : CHECK  CAN MAIN WIRE FOR DISCONNECTION  . 

    NG-B : CHECK  CAN BUS LINES FOR SHORT CIRCUIT   .

    OK: Go to Next Step 

  2. CHECK CAN BUS LINE FOR SHORT TO +B 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE CHART

      Tester Connection Switch Condition Specified Condition
      C14-6 (CANH) - C14-16 (BAT) Ignition switch off 6 kΩ or higher
      C14-14 (CANL) - C14-16 (BAT) Ignition switch off 6 kΩ or higher
      2. Fig 2: Identifying C14 And CANH Connector Terminals
      G05392057Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : CHECK  CAN BUS LINE FOR SHORT TO +B   .

    OK: Go to Next Step 

  3. CHECK CAN BUS LINE FOR SHORT TO GND 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE CHART

      Tester Connection Switch Condition Specified Condition
      C14-6 (CANH) - C14-4 (CG) Ignition switch off 200 Ω or higher
      C14-14 (CANL) - C14-4 (CG) Ignition switch off 200 Ω or higher
      2. Fig 3: Identifying C14, CG And CANH Connector Terminals
      G05392058Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : CHECK  CHECK CAN BUS LINE FOR SHORT TO GND  . 

    OK :  HOW TO PROCEED WITH TROUBLESHOOTING  . 

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