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Open in CAN Main Bus Line: Procedure

  1. CHECK DLC3 
    1. Turn the engine switch off.
    2. Measure the resistance according to the value(s) in the table below.
      GTY135146Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Value Result
      J21-6 (CANH) -J21-14 (CANL) Engine switch off 108 to 132 Ω A
      J21-6 (CANH) - J21-14 (CANL) Engine switch off 133 Ω or higher B
      NOTE:

      When the measured value is 133 Ω or more and a CAN communication system DTC is output, there may be a fault besides disconnection of the DLC3 branch line. For that reason, troubleshooting should be performed again from "HOW TO PROCEED WITH TROUBLESHOOTING". Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2012 - ]  after repairing the trouble area.

    B → REPAIR OR REPLACE DLC3 BRANCH LINE OR CONNECTOR (CANH, CANL) 

    A: Go to next step 

  2. CHECK FOR OPEN IN CAN BUS MAIN LINE (CAN BUS CHECK) 
    1. Perform "CAN Bus Check" using the Techstream. Refer to DIAGNOSIS SYSTEM [08/2012 - ] .

      Result

      Specified Condition Proceed to
      "Engine" and "ECT" only are not displayed A
      "Body/Gateway" only is not displayed B
      Others C

    B → See step   4 

    C → See step   7 

    A: Go to next step 

  3. CHECK FOR OPEN IN CAN BUS MAIN LINE (ECM - CAN LH J/C) 
    1. Turn the engine switch off.
      GTY263428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the ECM connector (A5).
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A5-25 (CANH) - A5-24 (CANL) Engine switch off 108 to 132 Ω

    NG → REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR (ECM - CAN LH J/C) 

    OK → REPLACE ECM 

  4. CHECK FOR OPEN IN CAN BUS MAIN LINE (GATEWAY ECU - CAN LH J/C) 
    1. Turn the engine switch off.
      GTY258346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the gateway ECU connector (J76).
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J76-17 (CA1H) - J76-18 (CA1L) Engine switch off 108 to 132 Ω

    OK → REPLACE GATEWAY ECU 

    NG: Go to next step 

  5. RECONNECT CONNECTOR 
    1. Reconnect the gateway ECU connector (J76).

    NEXT: Go to next step 

  6. CHECK FOR OPEN IN CAN BUS MAIN LINE (CAN RH J/C - GATEWAY ECU) 
    1. Disconnect the CAN main bus line connector (J84) from the CAN RH J/C B side (w/o earth terminal).
      GTY276137Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J84-1 (CANH) - J84-2 (CANL) Engine switch off 108 to 132 Ω

    NG → REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR (CAN RH J/C - GATEWAY ECU) 

    OK → REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR (CAN LH J/C - CAN RH J/C) 

  7. CHECK FOR OPEN IN CAN BUS MAIN LINE (ECM - CAN LH J/C) 
    1. Turn the engine switch off.
      GTY263428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the ECM connector (A5).
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A5-25 (CANH) - A5-24 (CANL) Engine switch off 108 to 132 Ω

    OK → REPLACE ECM 

    NG: Go to next step 

  8. RECONNECT CONNECTOR 
    1. Reconnect the ECM connector (A5).

    NEXT: Go to next step 

  9. CHECK FOR OPEN IN CAN BUS MAIN LINE (GATEWAY ECU - CAN LH J/C) 
    1. Disconnect the gateway ECU connector (J76).
      GTY258346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J76-17 (CA1H) - J76-18 (CA1L) Engine switch off 108 to 132 Ω

    OK → REPLACE GATEWAY ECU 

    NG: Go to next step 

  10. RECONNECT CONNECTOR 
    1. Reconnect the gateway ECU connector (J76).

    NEXT: Go to next step 

  11. CHECK FOR OPEN IN CAN BUS MAIN LINE (CAN RH J/C - GATEWAY ECU) 
    1. Disconnect the CAN main bus line connector (J84) from the CAN RH J/C B side (w/o earth terminal).
      GTY276137Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Before disconnecting the connector, make a note of where it is connected.
      • Reconnect the connector to its original position.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Value
      J84-1 (CANH) - J84-2 (CANL) Engine switch off 108 to 132 Ω

    NG → REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR (CAN RH J/C - GATEWAY ECU) 

    OK: Go to next step 

  12. RECONNECT CONNECTOR 
    1. Reconnect the CAN main bus line connector (J84) to the CAN RH J/C B side (w/o earth terminal).

    NEXT: Go to next step 

  13. CHECK FOR OPEN IN CAN BUS MAIN LINE (ECM - CAN LH J/C) 
    1. Disconnect the CAN main bus line connector (J2) from the CAN LH J/C A side (w/ earth terminal).
      GTY255755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J2-1 (CANH) - J2-2 (CANL) Engine switch off 108 to 132 Ω

    NG → REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR (ECM - CAN LH J/C) 

    OK → REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR (CAN LH J/C - CAN RH J/C) 

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