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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 1 Lines for Short Circuit [02/2019 - 08/2020] >> Procedure

Check Bus 1 Lines for Short Circuit [02/2019 - 08/2020]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 CAN JUNCTION CONNECTOR) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the No. 2 CAN junction connector.
      GTY859461Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 2 CAN Junction Connector)      		 *b to Millimeter Wave Radar Sensor Assembly (w/ Pre-collision System)
      *c to No. 8 CAN Junction Connector *d to Swing Grille Actuator Assembly (w/ Grille Shutter System)
      *e to Parking Assist ECU (w/ Panoramic View Monitor System) *f to Forward Recognition Camera (w/ Pre-collision System)
      *g to Clearance Warning ECU Assembly (w/ Intuitive Parking Assist System) *h 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 Connected to
      G102-2 (CANH) - G102-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Millimeter wave radar sensor assembly*1
      G102-3 (CANH) - G102-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 8 CAN junction connector
      G102-4 (CANH) - G102-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Swing grille actuator assembly*4
      G102-5 (CANH) - G102-15 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Parking assist ECU*3
      G102-6 (CANH) - G102-16 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Forward recognition camera*1
      G102-7 (CANH) - G102-17 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Clearance warning ECU assembly*2
      G102-8 (CANH) - G102-18 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Central gateway ECU (network gateway ECU)

      *1: w/ Pre-collision System

      *2: w/ Intuitive Parking Assist System

      *3: w/ Panoramic View Monitor System

      *4: w/ Grille Shutter System

      Result

      Result Proceed to
      OK A
      NG (Central gateway ECU [network gateway ECU] CAN main wire) B
      NG (No. 8 CAN junction connector CAN main wire) C
      NG (Swing grille actuator assembly CAN branch wire) D
      NG (Wire to ECU or sensor) E

    Result: 

    A 

    REPLACE NO. 2 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  3

    Result: 

    D 

    See step  6

    Result: 

    E 

    See step  5

    Result: 

    B 

    See step  2

  2. CHECK FOR SHORT IN CAN BUS WIRES (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 2 CAN JUNCTION CONNECTOR) 
    1. Reconnect the G102 No. 2 CAN junction connector.
    2. Disconnect the central gateway ECU (network gateway ECU) connector.
      GTY900941Courtesy 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
      G72-23 (CA1H) - G72-8 (CA1L) 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 [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 2 CAN JUNCTION CONNECTOR) 

  3. CHECK FOR SHORT IN CAN BUS WIRES (NO. 8 CAN JUNCTION CONNECTOR) 
    1. Reconnect the G102 No. 2 CAN junction connector.
    2. Disconnect the No. 8 CAN junction connector.
      GTY850960Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 8 CAN Junction Connector)      		 *b to No. 2 CAN Junction Connector
      *c to Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System) *d to Television Camera Assembly (w/ Panoramic View Monitor System, w/ Parking Assist Monitor System)
      *e to No. 1 CAN Junction Terminal - -
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Connected to
      N53-1 (CANH) - N53-7 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 2 CAN junction connector
      N53-2 (CANH) - N53-8 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Blind spot monitor sensor LH*1
      N53-3 (CANH) - N53-9 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Television camera assembly*2, *3
      N53-4 (CANH) - N53-10 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 1 CAN junction terminal

      *1: w/ Blind Spot Monitor System

      *2: w/ Panoramic View Monitor System

      *3: w/ Parking Assist Monitor System

      Result

      Result Proceed to
      OK A
      NG (No. 1 CAN junction terminal CAN main wire) B
      NG (No. 2 CAN junction connector CAN main wire) C
      NG (Wire to ECU or sensor) D

    Result: 

    A 

    REPLACE NO. 8 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR) 

    Result: 

    D 

    See step  5

    Result: 

    B 

    See step  4

  4. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION TERMINAL - NO. 8 CAN JUNCTION CONNECTOR) 
    1. Reconnect the N54 No. 8 CAN junction connector.
    2. Disconnect the No. 1 CAN junction terminal connector.
      GTY881761Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 1 CAN Junction Terminal)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N54-3 (CANH) - N54-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 1 CAN JUNCTION TERMINAL 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 CAN JUNCTION TERMINAL - NO. 8 CAN JUNCTION CONNECTOR) 

  5. CHECK FOR SHORT IN CAN BUS WIRES (ECU, 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 [02/2019 - 10/2019] , or refer to TERMINALS OF ECU [10/2019 - 06/2020] , or refer to TERMINALS OF ECU [06/2020 - 08/2020]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      G72-23 (CA1H) - G72-8 (CA1L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      GTY905514Courtesy 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 

  6. CHECK FOR SHORT IN CAN BUS WIRES (SWING GRILLE ACTUATOR ASSEMBLY BRANCH WIRE) 
    1. Reconnect the G102 No. 2 CAN junction connector.
    2. Disconnect the swing grille actuator assembly connector.
      GTY918358Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Swing Grille Actuator Assembly)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A-6 (CANP) - A-5 (CANN) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE SWING GRILLE ACTUATOR ASSEMBLY 

    Refer to DISASSEMBLY [11/2018 - 12/2021]

    Result: 

    NG 

    See step  7

  7. CHECK FOR SHORT IN CAN BUS WIRES (RADIATOR SHUTTER SUB-ASSEMBLY BRANCH WIRE) 
    1. Reconnect the swing grille actuator assembly connector.
    2. Disconnect the radiator shutter sub-assembly connector.
      GTY914675Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Radiator Shutter Sub-assembly)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A50-2 (CANP) - A50-3 (CANN) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE RADIATOR SHUTTER SUB-ASSEMBLY 

    Refer to REMOVAL [02/2019 - 12/2021]

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (RADIATOR SHUTTER SUB-ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR) 

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