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Home >> Toyota >> 2020 >> Avalon Limited >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System (Nickel Metal Hydride) - Diagnostic Codes (P314A-U0424) & Circuit Tests >> HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY) >> Circuit Tests >> Pattern Select Switch Sport Mode Circuit [04/2018 - 08/2020] >> Procedure

Pattern Select Switch Sport Mode Circuit [04/2018 - 08/2020]: Procedure

  1. READ VALUE USING TECHSTREAM (CAN BUS CHECK) 

    See step  2

    Result

    Result Proceed to
    All of the ECUs and sensors that are currently connected to the CAN communication system are displayed A
    None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed B

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 - ] 

    Result: 

    A 

    See step  2

  2. CHECK DTC OUTPUT (HEALTH CHECK) 

    See step  3

    Result

    Result Proceed to
    No DTCs are output A
    DTCs are output B

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [04/2018 - 08/2020] 

    Result: 

    A 

    See step  3

  3. READ VALUE USING TECHSTREAM (SPORT MODE SWITCH, NORMAL MODE SWITCH) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain/Hybrid Control/Data List/Sport Mode Switch, Normal Mode Switch.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Sport Mode Switch
      Normal Mode Switch
    4. Read the value displayed on the Techstream.

      Powertrain > Hybrid Control > Data List 

      Tester Display Measurement Item Range Normal Condition
      Sport Mode Switch Sport mode switch condition ON or OFF Sport mode switch being pushed and held: ON
      Sport mode switch not operated: OFF
      Normal Mode Switch Normal mode switch condition ON or OFF Normal mode switch being pushed and held: ON
      Normal mode switch not operated: OFF

      Result

      Result Proceed to
      The Techstream display changes according to the switch (Sport mode, Normal mode) operation A
      The Techstream display does not change according to the switch (Sport mode, Normal mode) operation B
    5. Turn the power switch off.

    Result: 

    A 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [04/2018 - 08/2021] 

    Result: 

    B 

    See step  4

  4. INSPECT ELECTRIC PARKING BRAKE SWITCH ASSEMBLY (SPORT MODE, NORMAL MODE) 

    Refer to INSPECTION [04/2018 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE ELECTRIC PARKING BRAKE SWITCH ASSEMBLY. Refer to  REMOVAL [04/2018 - ] 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY - BODY GROUND) 
    1. Disconnect the G24 electric parking brake switch assembly connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY863474Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Electric Parking Brake Switch Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      G24-16 (GND1) - Body ground Always Below 1 Ω
    3. Reconnect the G24 electric parking brake switch assembly connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) 
    1. Disconnect the G46 and G47 hybrid vehicle control ECU connectors.
    2. Disconnect the G24 electric parking brake switch assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY874667Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU)      		 *b Front view of wire harness connector
      (to Electric Parking Brake Switch Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      G47-6 (SPRT) - G24-12 (P) Always Below 1 Ω
      G47-6 (SPRT) or G24-12 (P) - Body ground Always 10 kΩ or higher
      G46-10 (NORM) - G24-13 (B) Always Below 1 Ω
      G46-10 (NORM) or G24-13 (B) - Body ground Always 10 kΩ or higher
    4. Reconnect the G24 electric parking brake switch assembly.
    5. Reconnect the G46 and G47 hybrid vehicle control ECU connectors.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [04/2018 - 08/2021] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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