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Check CAN Communication Connection [11/2022 - ]: Procedure

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  1. CHECK GTS OPERATION 

    HINT: 

    Read the GTS operator's manual before use.

    Refer to GENERAL INFORMATION [09/2021 - ]

    1. Connect the GTS to the DLC3 of another vehicle.
    2. Turn the ignition switch to ON.
    3. Turn the GTS on.
    4. Check that the GTS and ECUs can communicate with the ignition switch ON.

      HINT: 

      • ECUs and sensors are not displayed on the "Communication Bus Check" screen when the GTS cannot communicate with the vehicle.
      • If communication between the GTS and ECUs is not possible, either the GTS or vehicle has a malfunction.
      • If communication between the GTS and ECUs is still not possible even when the GTS is connected to another vehicle, the GTS has a malfunction. Perform the self tests described in the GTS operator's manual. (The GTS may be malfunctioning or its auxiliary battery may be discharged.)

      Result

      Result Proceed to
      OK (Communication between the GTS and the vehicle is not possible, but communication is possible when connected to another vehicle.) A
      NG (Communication is not possible between the GTS and the vehicle, nor between the GTS and another vehicle.) B

    Result: 

    B 

    REFER TO GTS OPERATOR'S MANUAL 

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (DLC3 POWER SOURCE CIRCUIT) 
    1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      I26-16 (BAT) - Body ground Ignition switch off 11 to 14 V
      GTY1119116Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3
    2. Disconnect the cable from the negative (-) auxiliary battery terminal.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I26-4 (CG) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 POWER SOURCE CIRCUIT) 

    Result: 

    OK 

    See step  3

  3. CHECK OPEN IN CAN BUS LINES 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I26-6 (CANH) - I26-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal Below 70 Ω
      GTY1116256Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  6

    Result: 

    OK 

    See step  4

  4. CHECK SHORT IN CAN BUS LINE 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I26-6 (CANH) - I26-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 Ω or higher
      I26-6 (CANH) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      I26-14 (CANL) - I26-4 (CG)
      I26-6 (CANH) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      I26-14 (CANL) - I26-16 (BAT)
      GTY1116255Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Disconnect the central gateway ECU (network gateway ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I231-22 (GND) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      GTY1118936Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Central Gateway ECU (Network Gateway ECU))
    3. Reconnect the cable to the negative (-) auxiliary battery terminal.
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      I231-1 (BATT) - Body ground Ignition switch off 11 to 14 V
      I231-2 (ACC) - Body ground Ignition switch ACC 11 to 14 V
      I231-20 (IGR) - Body ground Ignition switch ON 11 to 14 V
      I231-19 (IGP) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

    Refer to REMOVAL [11/2022 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

  6. CHECK FOR OPEN IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - DLC3) 
    1. Disconnect the central gateway ECU (network gateway ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1117703Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to Central Gateway ECU (Network Gateway ECU))      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      I231-16 (CA6H) - I26-6 (CANH) Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      I231-17 (CA6L) - I26-14 (CANL)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

    Refer to REMOVAL [11/2022 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - DLC3) 

  7. CHECK SHORT IN CAN BUS LINE 
    1. Disconnect the central gateway ECU (network gateway ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1117702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to Central Gateway ECU (Network Gateway ECU))      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      I231-16 (CA6H) - I231-17 (CA6L) Cable disconnected from negative (-) auxiliary battery terminal 1 MΩ or higher
      I231-16 (CA6H) - I26-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      I231-17 (CA6L) - I26-4 (CG)
      I231-16 (CA6H) - I26-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      I231-17 (CA6L) - I26-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

    Refer to REMOVAL [11/2022 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) 

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