CAN COMMUNICATION SYSTEM CAN Bus Line

DESCRIPTION

Measure the resistance from the DLC3 before checking the CAN bus lines to troubleshoot the CAN communication system.

WIRING DIAGRAM

A01BESSE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CAN BUS WIRE (MAIN BUS LINE FOR DISCONNECTION, BUS LINES FOR SHORT CIRCUIT)


    1. A01BI1KE20

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

      Standard resistance
      Tester Connection Condition Specified Value Result
      H23-6 (CANH) - H23-14 (CANL) IG switch OFF 54 to 69 Ω OK
      H23-6 (CANH) - H23-14 (CANL) IG switch OFF 69 Ω or higher NG - A
      H23-6 (CANH) - H23-14 (CANL) IG switch OFF Below 54 Ω NG - B

      Tech Tips



    NG-A

    OPEN IN CAN MAIN BUS LINE

    NG-B

    SHORT IN CAN BUS LINES

    OK

  2. CHECK CAN BUS LINE FOR SHORT TO B+


    1. A01BI1KE22

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

      Standard resistance
      Tester Connection Condition Specified Value
      H23-6 (CANH) - H23-16 (BAT) IG switch OFF 1 MΩ or higher

      H23-14 (CANL) -

      H23-16 (BAT)

      		 IG switch OFF 1 MΩ or higher

      Tech Tips

      NG: Short to B+ in CAN Bus Line Click here


    NG

    SHORT TO B+ IN CAN BUS LINE

    OK

  3. CHECK CAN BUS LINE FOR SHORT TO GND


    1. A01BI1KE23

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

      Standard resistance
      Tester Connection Condition Specified Value
      H23-4 (CG) - H23-6 (CANH) IG switch OFF 3 kΩ or higher
      H23-4 (CG) - H23-14 (CANL) IG switch OFF 3 kΩ or higher

      Tech Tips



    NG

    SHORT TO GND IN CAN BUS LINE

    OK

    GO TO "HOW TO PROCEED WITH TROUBLESHOOTING"