AUTOMATIC TRANSMISSION SYSTEM Transmission Control Switch Circuit

DESCRIPTION

The transmission control switch detects when the shift lever is moved to M.

Using the transmission control switch, when the shift lever is in M, it is possible to select between 1st and 8th gears (M1 to M8).

Moving the shift lever to "+" once selects the next higher gear, and moving the shift lever to "-" once selects the next lower gear.

WIRING DIAGRAM

A01Q8KYE02
A01Q8KYE03

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. INSPECT TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY)


    1. A01Q9RIC73
      *A for LHD
      *B for RHD
      *a

      Component without harness connected

      (Transmission Control Switch (Transmission Floor Shift Assembly))

      Disconnect the K41*1 or T8*2 transmission control switch (transmission floor shift assembly) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance (for LHD)
      Tester Connection Condition Specified Condition
      4 (IG) - 5 (S) Shift lever in M, "+" and "-" Below 1 Ω
      Shift lever not in M, "+" and "-" 10 kΩ or higher
      3 (SFTU) - 2 (E) Shift lever held in "+" (Up shift) Below 1 Ω
      Shift lever in M 10 kΩ or higher
      1 (SFTD) - 2 (E) Shift lever held in "-" (Down shift) Below 1 Ω
      Shift lever in M 10 kΩ or higher
      Standard Resistance (for RHD)
      Tester Connection Condition Specified Condition
      4 (IG) - 5 (S) Shift lever in M, "+" and "-" Below 1 Ω
      Shift lever not in M, "+" and "-" 10 kΩ or higher
      1 (SFTU) - 2 (E) Shift lever held in "+" (Up shift) Below 1 Ω
      Shift lever in M 10 kΩ or higher
      3 (SFTD) - 2 (E) Shift lever held in "-" (Down shift) Below 1 Ω
      Shift lever in M 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - BATTERY, BODY GROUND)


    1. Turn the engine switch on (IG).

    2. A01Q9EVC62
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Transmission Floor Shift Assembly (Transmission Control Switch))

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

      Standard Voltage (for LHD)
      Tester Connection Condition Specified Condition
      K41-4 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      Standard Voltage (for RHD)
      Tester Connection Condition Specified Condition
      T8-4 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    3. Turn the engine switch off.

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

      Standard Resistance (for LHD)
      Tester Connection Condition Specified Condition
      K41-2 (E) - Body ground Always Below 1 Ω
      Standard Resistance (for RHD)
      Tester Connection Condition Specified Condition
      T8-2 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION CONTROL SWITCH - BATTERY, BODY GROUND)

    OK

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)


    1. Connect the K41*1 or T8*2 transmission control switch (transmission floor shift assembly) connector.


      • *1: for LHD

      • *2: for RHD

    2. B002CZRC50
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the A13 ECM connector.

    3. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A13-6 (S) - Body ground Shift lever in M, "+" and "-" 11 to 14 V
      Shift lever not in M, "+" and "-" Below 1 V

    5. Turn the engine switch off.

    6. Disconnect the spiral cable sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A13-29 (SFTU) - Body ground Shift lever held in "+" (Up shift) Below 1 Ω
      Shift lever in M 10 kΩ or higher
      A13-28 (SFTD) - Body ground Shift lever held in "-" (Down shift) Below 1 Ω
      Shift lever in M 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 (TRANSMISSION CONTROL SWITCH - ECM)