HYBRID CONTROL SYSTEM Kick Down Switch Circuit

DESCRIPTION

If the power management control ECU receives a kick down switch signal, the power that can be output increases to enable more powerful driving. If there is an open in the kick down switch circuit or the power management control ECU erroneously recognizes the switch signal, power output is limited to the same level as for when the kick down switch is off.

WIRING DIAGRAM

A01FTNRE06

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING GTS (KICK DOWN SWITCH STATUS)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Kick Down Switch Status.

    4. Read the value displayed on the GTS.

      Tester Display Measurement Item/Range Normal Condition
      Kick Down Switch Status

      Kick down switch signal/

      ON or OFF

      Accelerator pedal is depressed all the way down:

      ON

      Accelerator pedal is released:

      OFF
      Result
      Result Proceed to
      The GTS display changes according to the accelerator pedal operation. A
      The GTS display does not change according to the accelerator pedal operation. B

    5. Turn the power switch off.


    B

    CHECK CONNECTOR CONNECTION CONDITION (KICK DOWN SWITCH CONNECTOR) Click here

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. CHECK CONNECTOR CONNECTION CONDITION (KICK DOWN SWITCH CONNECTOR)


    1. A01FRBYE01
      Text in Illustration
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the kick down switch assembly connector Click here.

      OK
      The connectors are connected securely and there are no contact pressure problems.

    NG

    CONNECT SECURELY

    OK

  3. CHECK POWER MANAGEMENT CONTROL ECU


    1. Disconnect the A3 kick down switch assembly connector.

    2. Turn the power switch on (IG).

    3. A01FUKSE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Kick Down Switch Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A3-2 (KD) - Body ground Power switch on (IG) 11 to 14 V

    4. Turn the power switch off.

    5. Reconnect the A3 kick down switch assembly connector.


    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - KICK DOWN SWITCH ASSEMBLY) Click here

    OK

  4. INSPECT KICK DOWN SWITCH ASSEMBLY


    1. Remove the kick down switch assembly Click here.

    2. A01FQ6ZE05
      Text in Illustration
      *a

      Component without harness connected

      (Kick Down Switch Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 (E) - 2 (KD) Press Below 1 Ω
      1 (E) - 2 (KD) Release 10 kΩ or higher

    3. Install the kick down switch assembly.


    NG

    REPLACE KICK DOWN SWITCH ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (KICK DOWN SWITCH ASSEMBLY - BODY GROUND)


    1. Disconnect the A3 kick down switch assembly connector.

    2. A01FUKSE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Kick Down Switch Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A3-1 (E) - A3-2 (KD) Power switch off Below 1 Ω

    3. Reconnect the A3 kick down switch assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  6. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - KICK DOWN SWITCH ASSEMBLY)


    1. Disconnect the N91 power management control ECU connector.

    2. Disconnect the A3 kick down switch assembly connector.

    3. A01FV16E01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)
      *b

      Front view of wire harness connector

      (to Kick Down Switch Assembly)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      N91-9 (KD) - A3-2 (KD) Power switch off Below 1 Ω
      N91-9 (KD) or A3-2 (KD) - Body ground Power switch off 10 kΩ or higher

    4. Reconnect the N91 power management control ECU connector.

    5. Reconnect the A3 kick down switch assembly connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here