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Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 54 (Can Communication System (HV) - Circuit Tests (2 Of 6)) >> CAN COMMUNICATION SYSTEM (for HV Model) >> Parking Assist ECU Communication Stop Mode [02/2019 - 10/2022] >> Procedure

Parking Assist ECU Communication Stop Mode [02/2019 - 10/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR OPEN IN CAN BUS WIRE (PARKING ASSIST ECU BRANCH WIRE) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the parking assist ECU connector.
      GTY846952Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Parking Assist ECU)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N25-11 (CANH) - N25-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR 

    Result: 

    OK 

    See step  2

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      N25-4 (GND1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      GTY846954Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Parking Assist ECU)
    2. Reconnect the cable to the negative (-) auxiliary battery terminal.
      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

      Refer to INITIALIZATION [02/2019 - 10/2019] , or refer to INITIALIZATION [10/2019 - 06/2020] , or refer to INITIALIZATION [06/2020 - 08/2020] , or refer to INITIALIZATION [08/2020 - 12/2021] , or refer to INITIALIZATION [12/2021 - 10/2022]

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

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      N25-1 (+B) - Body ground Ignition switch off 11 to 14 V
      N25-2 (ACC) - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      N25-3 (IG) - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE PARKING ASSIST ECU 

    Refer to REMOVAL [11/2018 - 10/2022]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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