AUTOMATIC TRANSMISSION SYSTEM(for 8AR-FTS) Kick Down Switch Circuit

DESCRIPTION

The kick down switch turns ON when the accelerator pedal is fully depressed to send a signal to the ECM.

When the kick down switch is ON, the ECM controls gear shifting according to programmed shift diagrams.

If a short circuit develops in the kick-down switch assembly, the ECM disregards the kick down signals and performs shifts at the normal shift points.

WIRING DIAGRAM

B003VKVE13

PROCEDURE


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


    1. Disconnect the A57 kick down switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A57-1 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (KICK DOWN SWITCH ASSEMBLY - BODY GROUND)

    OK

  2. INSPECT KICK DOWN SWITCH ASSEMBLY


    1. Remove the kick down switch assembly.

      Click here

    2. B003VU3C02
      *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 Condition Specified Condition
      1 (E) - 2 (KD)

      Continuously pressed

      (Kick down switch is on)

      		 Below 1 Ω

      Released

      (Kick down switch is off)

      		 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE KICK DOWN SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (KICK DOWN SWITCH ASSEMBLY - ECM)


    1. Install the kick down switch assembly.

      Click here

    2. Disconnect the A91 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A91-53 (KD) - Body ground

      Fully depressed

      (Kick down switch is on)

      		 Below 1 Ω

      Released

      (Kick down switch is off)

      		 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (KICK DOWN SWITCH ASSEMBLY - ECM)