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Home >> Toyota >> 2022 >> RAV4 LE, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 76 (Can Communication System (HV) - Circuit Tests (3 Of 6)) >> CAN COMMUNICATION SYSTEM (for HV Model) >> Check Bus 2 Lines for Short Circuit [11/2018 - 02/2019] >> Procedure

Check Bus 2 Lines for Short Circuit [11/2018 - 02/2019]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 CAN JUNCTION CONNECTOR) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the No. 3 CAN junction connector.
      GTY859460Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 3 CAN Junction Connector)      		 *b to Central Gateway ECU (Network Gateway ECU)
      *c to ECM *d to Inverter with Converter Assembly
      *e to Hybrid Vehicle Control ECU Assembly *f to Brake Booster with Master Cylinder Assembly (Skid Control ECU)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      G103-1 (CANH) - G103-11 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU)
      G103-3 (CANH) - G103-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω ECM
      G103-4 (CANH) - G103-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inverter with converter assembly
      G103-5 (CANH) - G103-15 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Hybrid vehicle control ECU assembly
      G103-7 (CANH) - G103-17 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Brake booster with master cylinder assembly (skid control ECU)

      Result

      Result Proceed to
      OK A
      NG (Central gateway ECU [network gateway ECU] CAN main wire) B
      NG (ECM CAN main wire) C
      NG (Wire to ECU or sensor) D

    Result: 

    A 

    REPLACE NO. 3 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  3

    Result: 

    D 

    See step  4

    Result: 

    B 

    See step  2

  2. CHECK FOR SHORT IN CAN BUS WIRES (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 3 CAN JUNCTION CONNECTOR) 
    1. Reconnect the G103 No. 3 CAN junction connector.
    2. Disconnect the central gateway ECU (network gateway ECU) connector.
      GTY918428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Central Gateway ECU [Network Gateway ECU])
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G72-18 (CA4H) - G72-17 (CA4L) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

    Refer to REMOVAL [11/2018 - 02/2019]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 3 CAN JUNCTION CONNECTOR) 

  3. CHECK FOR SHORT IN CAN BUS WIRES (ECM - NO. 3 CAN JUNCTION CONNECTOR) 
    1. Reconnect the G103 No. 3 CAN junction connector.
    2. Disconnect the ECM connector.
      GTY839406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to ECM)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A24-8 (CANH) - A24-18 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM 

    Refer to REMOVAL [11/2018 - 02/2019]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS WIRE OR CONNECTOR (ECM - NO. 3 CAN JUNCTION CONNECTOR) 

  4. CHECK FOR SHORT IN CAN BUS WIRES (ECU OR SENSOR) 
    1. Reconnect all wire harness connectors.
    2. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch line is connected.

      Refer to TERMINALS OF ECU [11/2018 - 02/2019]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      G72-18 (CA4H) - G72-17 (CA4L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      GTY905518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Central Gateway ECU [Network Gateway ECU])

      HINT: 

      • If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.
      • If the resistance does not become normal when the connector is disconnected from the ECU or sensor, check for a short in the wire harness and repair or replace the wire harness or connector if necessary.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECU OR SENSOR 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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