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AUTOMATIC TRANSMISSION SYSTEM Transmission Control Switch Circuit

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DTC Code DTC Name
  Transmission Control Switch Circuit
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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.

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

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

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PROCEDURE


  1. Click here

    INSPECT TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY)


    1. A01FO8RC53
      *a

      Component without harness connected

      (Transmission Floor Shift Assembly (Transmission Control Switch))
      *1 for LHD
      *2 for RHD

      Disconnect the O77 transmission floor shift assembly (transmission control switch) connector.

    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

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


    1. Turn the engine switch on (IG).

    2. A01FLTCC42
      *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
      Tester Connection Condition Specified Condition
      O77-4 (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
      Tester Connection Condition Specified Condition
      O77-2 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

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

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    CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)


    1. Connect the O77 transmission floor shift assembly (transmission control switch) connector.

    2. B00667YC43
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the A78 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
      A78-6 (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
      A78-29 (SFTU) - Body ground Shift lever held in "+" (Up shift) Below 1 Ω
      Shift lever in M 10 kΩ or higher
      A78-28 (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 TABLEClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)