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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 60 (Hybrid Control System (AWD) - Circuit Tests (2 Of 2)) >> HYBRID CONTROL SYSTEM (for AWD) >> Rear Motor Resolver Circuit [12/2019 - 11/2023] >> Procedure

Rear Motor Resolver Circuit [12/2019 - 11/2023]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - REAR MOTOR RESOLVER) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Disconnect the A55 inverter with converter assembly connector.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

    3. Connect the cable to the negative (-) auxiliary battery terminal.
    4. Turn the ignition switch to ON.
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A55-28 (RRF) - Body ground Ignition switch ON Below 1 V
      A55-1 (RRFG) - Body ground Ignition switch ON Below 1 V
      A55-19 (RSN) - Body ground Ignition switch ON Below 1 V
      A55-10 (RSNG) - Body ground Ignition switch ON Below 1 V
      A55-29 (RCS) - Body ground Ignition switch ON Below 1 V
      A55-20 (RCSG) - Body ground Ignition switch ON Below 1 V
      GTY839539Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Inverter with Converter Assembly)
      NOTE:

      Turning the ignition switch to ON with the inverter with converter assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the ignition switch off.
    7. Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 2 minutes or more.
    8. Reconnect the A55 inverter with converter assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  2

  2. CHECK REAR MOTOR RESOLVER 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Disconnect the A55 inverter with converter assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A55-28 (RRF) - A55-1 (RRFG) Ignition switch off 9.2 to 15.2 Ω
      A55-19 (RSN) - A55-10 (RSNG) Ignition switch off 16.5 to 28.5 Ω
      A55-29 (RCS) - A55-20 (RCSG) Ignition switch off 18.4 to 30.4 Ω

      HINT: 

      To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68°F).

      R20 = Rt / {1 + 0.00393 X (T - 20)}

      The calculation is based on the following:

      R20: Resistance at 20°C (68°F) (mΩ)

      Rt: Measured resistance (mΩ)

      T: Temperature when the resistance is measured (°C (°F).)

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A55-28 (RRF) or A55-1 (RRFG) - Body ground and other terminals Ignition switch off 1 MΩ or higher
      A55-19 (RSN) or A55-10 (RSNG) - Body ground and other terminals Ignition switch off 1 MΩ or higher
      A55-29 (RCS) or A55-20 (RCSG) - Body ground and other terminals Ignition switch off 1 MΩ or higher
      A55-11 (DRN7) - Body ground Ignition switch off 1 MΩ or higher
      GTY973695Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Inverter with Converter Assembly)
    4. Reconnect the A55 inverter with converter assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REAR MOTOR RESOLVER CIRCUIT NORMAL (PERFORM NEXT STEP FOR REFERENCED DTC) 

    Result: 

    NG 

    See step  3

  3. CHECK CONNECTOR CONNECTION CONDITION (REAR MOTOR RESOLVER CONNECTOR) 
    1. Remove the rear suspension member sub-assembly.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

    2. Check the connection condition of the rear motor resolver connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2019 - ]

      GTY920910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      - The connector is connected securely.

      - The terminals are not deformed and are connected securely.

      - No water or foreign matter in the connector.

      Result

      Result Proceed to
      OK A
      NG (The connector is not connected securely.) B
      NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  4

  4. INSPECT REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY (REAR MOTOR RESOLVER) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Disconnect the N4 resolver connector.
      GTY920910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N4-4 (RRF) - N4-6 (RRFG) Ignition switch off 8.8 to 14.8 Ω
      N4-3 (RSN) - N4-7 (RSNG) Ignition switch off 16.1 to 28.1 Ω
      N4-2 (RCS) - N4-8 (RCSG) Ignition switch off 18.0 to 30.0 Ω

      HINT: 

      To correct the variation of the measured resistance due to temperature, use the following formula to calculate the resistance at 20°C (68°F).

      R20 = Rt / {1 + 0.00393 X (T - 20)}

      The calculation is based on the following:

      R20: Resistance at 20°C (68°F) (mΩ)

      Rt: Measured resistance (mΩ)

      T: Temperature when the resistance is measured (°C (°F).)

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      N4-4 (RRF) - Body ground and other terminals (except N4-6 (RRFG)) Ignition switch off 1 MΩ or higher
      N4-6 (RRFG) - Body ground and other terminals (except N4-4 (RRF)) Ignition switch off 1 MΩ or higher
      N4-3 (RSN) - Body ground and other terminals (except N4-7 (RSNG)) Ignition switch off 1 MΩ or higher
      N4-7 (RSNG) - Body ground and other terminals (except N4-3 (RSN)) Ignition switch off 1 MΩ or higher
      N4-2 (RCS) - Body ground and other terminals (except N4-8 (RCSG)) Ignition switch off 1 MΩ or higher
      N4-8 (RCSG) - Body ground and other terminals (except N4-2 (RCS)) Ignition switch off 1 MΩ or higher
      GTY889492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Rear Motor Resolver (Rear Traction Motor with Transaxle Assembly))
    4. Reconnect the N4 resolver connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    NG 

    REPLACE REAR TRACTION MOTOR WITH TRANSAXLE ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

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