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Home >> Toyota >> 2017 >> Prius Three >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System (Nickel Metal Hydride) - Diagnostic Codes (9 Of 9) & Circuit Tests >> HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY) >> Pattern Select Switch EV Mode Circuit [11/2015 - ] >> Procedure

Pattern Select Switch EV Mode Circuit [11/2015 - ]: Procedure

  1. ASK ABOUT VEHICLE CONDITION 
    1. Check if a buzzer sounded and a message was displayed on the multi-information display when attempting to enter EV drive mode.

      Result

      Result Proceed to
      No buzzer sounded and no message was displayed on multi-information display. A
      A buzzer sounded and a message was displayed on multi-information display. B

      HINT: 

      If a buzzer sounds and a message is displayed on the multi-information display, one or more of the EV drive mode entry conditions have not been met. Check that all of the EV drive mode entry conditions have been met before pressing the EV drive mode switch (pattern select switch assembly).

    Result: 

    B 

    END 

    Result: 

    A 

    See step  2

  2. READ VALUE USING TECHSTREAM (CAN BUS CHECK) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: System Select / CAN Bus Check.

      CAN Bus Check 

      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
    5. Turn the power switch off.

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - 12/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2018 - ] 

    Result: 

    A 

    See step  3

  3. CHECK DTC OUTPUT (HEALTH CHECK) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: System Select / Health Check.
    5. Check for DTCs.

      Result

      Result Proceed to
      No DTCs are output. A
      DTCs are output. B
    6. Turn the power switch off.

    Result: 

    B 

    GO TO  DTC INDEX 

    Result: 

    A 

    See step  4

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

      Powertrain > Hybrid Control > Data List 

      Tester Display
      EV Mode
      EV Mode Switch
    5. Read the value displayed on the Techstream.

      Powertrain > Hybrid Control > Data List 

      Tester Display Measurement Item Range Normal Condition
      EV Mode EV drive mode transition availability ON or OFF In EV drive mode: ON
      EV Mode Switch EV drive mode switch (pattern select switch assembly) condition ON or OFF EV drive mode switch (pattern select switch assembly) being pushed and held: ON
      EV drive mode switch (pattern select switch assembly) not pushed: OFF

      Result

      Result Proceed to
      The display changes according to the EV drive mode switch (pattern select switch assembly) operation. A
      The display does not change according to the EV drive mode switch (pattern select switch assembly) operation. B
    6. Turn the power switch off.

    Result: 

    A 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [11/2015 - ] 

    Result: 

    B 

    See step  5

  5. INSPECT EV DRIVE MODE SWITCH (PATTERN SELECT SWITCH ASSEMBLY) 
    1. Remove the EV drive mode switch (pattern select switch assembly).

      Refer to REMOVAL [11/2015 - ]

    2. Measure the resistance according to the value(s) in the table below.
      GTY550210Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (EV Drive Mode Switch (Pattern Select Switch Assembly)

      Standard Resistance

      (F44)

      (F44)

      Tester Connection Condition Specified Condition
      F44-10 (S) - F44-9 (E) EV drive mode switch (pattern select switch assembly) being pushed and held Below 50 Ω
      EV drive mode switch (pattern select switch assembly) not pushed 10 kΩ or higher
    3. Install the EV drive mode switch (pattern select switch assembly).

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE EV DRIVE MODE SWITCH (PATTERN SELECT SWITCH ASSEMBLY). Refer to  REMOVAL [11/2015 - ] 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (EV DRIVE MODE SWITCH (PATTERN SELECT SWITCH ASSEMBLY) - BODY GROUND) 
    1. Disconnect the F44 EV drive mode switch (pattern select switch assembly) connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY570403Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to EV Drive Mode Switch (Pattern Select Switch Assembly))

      Standard Resistance

      (F44)

      (F44)

      Tester Connection Condition Specified Condition
      F44-9 (E) - Body ground Always Below 1 Ω
    3. Reconnect the F44 EV drive mode switch (pattern select switch assembly) connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - EV DRIVE MODE SWITCH (PATTERN SELECT SWITCH ASSEMBLY)) 
    1. Disconnect the F3 hybrid vehicle control ECU connector.
    2. Disconnect the F44 EV drive mode switch (pattern select switch assembly) connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY591272Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Hybrid Vehicle Control ECU)
      *b Front view of wire harness connector
      (to EV Drive Mode Switch (Pattern Select Switch Assembly))

      Standard Resistance

      (F3, F44)

      (F3)

      (F44)

      Tester Connection Condition Specified Condition
      F3-33 (EVSW) - F44-10 (S) Always Below 1 Ω
      F3-33 (EVSW) or F44-10 (S) - Body ground Always 10 kΩ or higher
    4. Reconnect the F44 EV drive mode switch (pattern select switch assembly) connector.
    5. Reconnect the F3 hybrid vehicle control ECU connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [11/2015 - 12/2018]  , or refer to  REMOVAL [12/2018 - 08/2019]  , or refer to  REMOVAL [08/2019 - 07/2020]  , or refer to  REMOVAL [07/2020 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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