AUTOMATIC TRANSMISSION SYSTEM Shift Paddle Switch Circuit

DESCRIPTION

When the shift lever is in D, operating the "-" side shift paddle switch will cause the transmission to enter fixed range mode which restricts the highest gear. By operating the shift paddle switches "+" (UP) or "-" (DOWN), the shift range can be changed.

When the vehicle is being driven in D position (fixed range mode), if the vehicle is stopped or the accelerator pedal is kept steady for a certain period of time with the transmission in the same gear, the vehicle will change back automatically to normal D position operation.

When the shift lever is in M, it is possible to make use of the highest engine speeds by holding the vehicle in a gear. Gear hold control means that gear shifts will not be performed as long as the paddle switches are not operated in either the "+" (UP), or "-" (DOWN) direction.

WIRING DIAGRAM

A01MXASE04

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (SHIFT PADDLE SWITCH - ECM)


    1. A01MU48C25
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the A77 ECM connector.

    2. Measure the resistance between each terminal when the shift paddle is moved to each position.

      Standard Resistance
      Tester Connection Shift Paddle Position Specified Condition
      A77-8 (SFTU) - Body ground Pull continuously "+" (Up shift) Below 2.5 Ω
      Release "+" (Up shift) 1 MΩ or higher
      A77-7 (SFTD) - Body ground Pull continuously "-" (Down shift) Below 2.5 Ω
      Release "-" (Down shift) 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    NG

  2. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - BODY GROUND)


    1. A01MUTSC04
      *a

      Front view of wire harness connector

      (to Spiral Cable Sub-Assembly)

      Disconnect the spiral cable connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K26-2 (ECC) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY


    1. Inspect the spiral cable with sensor sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here

    OK

  4. INSPECT SHIFT PADDLE SWITCH LH (TRANSMISSION SHIFT SWITCH ASSEMBLY)


    1. A001L7UC04
      *a

      Component without harness connected

      (Shift Paddle Switch LH (Transmission Shift Switch))

      Remove the transmission shift switch.

      Click here

    2. Measure the resistance between each terminal when the shift paddle is moved to each position.

      Standard Resistance
      Tester Connection Shift Paddle Position Specified Condition
      C-1 (SDN) - C-2 (ECC) Pull continuously "-" (Down shift) Below 2.5 Ω
      Release "-" (Down shift) 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SHIFT PADDLE SWITCH LH (TRANSMISSION SHIFT SWITCH ASSEMBLY) Click here

    OK

  5. INSPECT SHIFT PADDLE SWITCH RH (TRANSMISSION SHIFT SWITCH ASSEMBLY)


    1. A001JL3C03
      *a

      Component without harness connected

      (Shift Paddle Switch RH (Transmission Shift Switch))

      Remove the transmission shift switch.

      Click here

    2. Measure the resistance between each terminal when the shift paddle is moved to each position.

      Standard Resistance
      Tester Connection Shift Paddle Position Specified Condition
      B-3 (SUP) - B-2 (ECC) Pull continuously "+" (Up shift) Below 2.5 Ω
      Release "+" (Up shift) 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SHIFT PADDLE SWITCH RH (TRANSMISSION SHIFT SWITCH ASSEMBLY) Click here

    OK

  6. INSPECT NO. 1 SWITCH WIRE


    1. B003TKZC01
      *a

      Component without harness connected

      (No. 1 switch wire)

      Install the transmission shift switch.

    2. Disconnect the No. 1 switch wire connector from the steering pad switch.

    3. Measure the resistance between each terminal when the shift paddle is moved to each position.

      Standard Resistance
      Tester Connection Shift Paddle Position Specified Condition
      A-1 (SUP) - A-3 (ECC) Pull continuously "+" (Up shift) Below 2.5 Ω
      Release "+" (Up shift) 1 MΩ or higher
      A-2 (SDN) - A-3 (ECC) Pull continuously "-" (Down shift) Below 2.5 Ω
      Release "-" (Down shift) 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SWITCH NO.1 WIRE

    OK

  7. CHECK STEERING PAD SWITCH ASSEMBLY


    1. A01MWL3C04
      *a

      Component without harness connected

      (Steering Pad Switch Assembly)

      Connect the No. 1 switch wire connector to the steering pad switch.

    2. Disconnect the steering pad switch connector.

    3. Measure the resistance between each terminal when the shift paddle is moved to each position.

      Standard Resistance
      Tester Connection Shift Paddle Position Specified Condition
      z4-6 (SUP) - z4-7 (ECC) Pull continuously "+" (Up shift) Below 2.5 Ω
      Release "+" (Up shift) 1 MΩ or higher
      z4-12 (SDN) - z4-7 (ECC) Pull continuously "-" (Down shift) Below 2.5 Ω
      Release "-" (Down shift) 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - ECM)


    1. Disconnect the K26 spiral cable connector.

    2. Disconnect the A77 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A77-8 (SFTU) - K26-14 (SUP) Always Below 1 Ω
      A77-7 (SFTD) - K26-7 (SDN) Always Below 1 Ω
      A77-8 (SFTU) or K26-14 (SUP) - Body ground Always 10 kΩ or higher
      A77-7 (SFTD) or K26-7 (SDN) - Body ground Always 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