AUTOMATIC TRANSMISSION SYSTEM(for 8AR-FTS) 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 "+" (up shift) or "-" (down shift) shift paddle switch, the gear can be changed.

When the vehicle is being driven with the shift lever in D (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 "+" (up shift), or "-" (down shift) shift paddle switch is not operated.

WIRING DIAGRAM

A01MYOHE02

PROCEDURE


  1. CHECK VEHICLE CONDITION


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      w/o Dynamic Radar Cruise Control System A
      w/ Dynamic Radar Cruise Control System B

    B

    CHECK HARNESS AND CONNECTOR (SHIFT PADDLE SWITCH - ECM) Click here

    A

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


    1. Disconnect the A91 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A91-42 (SFTU) - A91-41 (ECCS) Pull continuously "+" (Up shift) Below 2.5 Ω
      Release "+" (Up shift) 1 MΩ or higher
      A91-43 (SFTD) - A91-41 (ECCS) Pull continuously "-" (Down shift) Below 2.5 Ω
      Release "-" (Down shift) 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM) Click here

    OK

  3. CHECK WIRE HARNESS AND CONNECTORS (ECM - BODY GROUND)


    1. Disconnect the F78 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F78-53 (E1) - Body ground Always Below 1 Ω
      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 (ECM - BODY GROUND)

  4. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM)


    1. Disconnect the K26 spiral cable sub-assembly connector.

    2. Disconnect the A91 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A91-42 (SFTU) - K26-14 (SUP) Always Below 1 Ω
      A91-43 (SFTD) - K26-7 (SDN) Always Below 1 Ω
      A91-41 (ECCS) - K26-2 (ECC) Always Below 1 Ω
      A91-42 (SFTU) or K26-14 (SUP) - Body ground Always 10 kΩ or higher
      A91-43 (SFTD) or K26-7 (SDN) - Body ground Always 10 kΩ or higher
      A91-41 (ECCS) or K26-2 (ECC) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM)

    OK

  5. INSPECT SPIRAL CABLE SUB-ASSEMBLY


    1. Inspect the spiral cable sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

    OK

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


    1. A01MWTZC05
      *a

      Component without harness connected

      (Shift Paddle Switch LH (Transmission Shift Switch Assembly))

      Remove the transmission shift switch assembly (shift paddle switch LH).

      Click here

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

      Standard Resistance
      Tester Connection Condition 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 TRANSMISSION SHIFT SWITCH ASSEMBLY (SHIFT PADDLE SWITCH LH) Click here

    OK

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


    1. A01MXMBC04
      *a

      Component without harness connected

      (Shift Paddle Switch RH (Transmission Shift Switch Assembly))

      Remove the transmission shift switch assembly (shift paddle switch RH).

      Click here

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

      Standard Resistance
      Tester Connection Condition 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 TRANSMISSION SHIFT SWITCH ASSEMBLY (SHIFT PADDLE SWITCH RH) Click here

    OK

  8. INSPECT NO. 1 SWITCH WIRE


    1. B003TKZC06
      *a

      Front view of wire harness connector

      (to Steering Pad Switch Assembly)

      Install the transmission shift switch assembly.

      Click here

    2. Disconnect the z6 No. 1 switch wire connector from the steering pad switch assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z6-1 (SUP) - z6-3 (ECC) Pull continuously "+" (Up shift) Below 2.5 Ω
      Release "+" (Up shift) 1 MΩ or higher
      z6-2 (SDN) - z6-3 (ECC) Pull continuously "-" (Down shift) Below 2.5 Ω
      Release "-" (Down shift) 1 MΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE NO. 1 SWITCH WIRE Click here

    OK

  9. INSPECT STEERING PAD SWITCH ASSEMBLY


    1. A01MWL3C15
      *a

      Front view of wire harness connector

      (to Spiral Cable Sub-assembly)

      Connect the z6 No. 1 switch wire connector to the steering pad switch assembly.

    2. Disconnect the z4 steering pad switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition 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

    OK

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

    NG

    REPLACE STEERING PAD SWITCH ASSEMBLY Click here

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


    1. Disconnect the A91 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A91-42 (SFTU) - Body ground Pull continuously "+" (Up shift) Below 2.5 Ω
      Release "+" (Up shift) 1 MΩ or higher
      A91-43 (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 Click here

    NG

  11. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM)


    1. Disconnect the K26 spiral cable sub-assembly connector.

    2. Disconnect the A91 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A91-42 (SFTU) - K26-14 (SUP) Always Below 1 Ω
      A91-43 (SFTD) - K26-7 (SDN) Always Below 1 Ω
      A91-42 (SFTU) or K26-14 (SUP) - Body ground Always 10 kΩ or higher
      A91-43 (SFTD) or K26-7 (SDN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND)


    1. Disconnect the K26 spiral cable sub-assembly 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

    OK

    GO TO STEP 5 Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR