AUTOMATIC TRANSMISSION SYSTEM (for 3UR-FE) Transmission Control Switch Circuit

DESCRIPTION

When moving the shift lever to S using the transmission control switch, it is possible to switch the shift range among "1" (1st range) and "6" (6th range).

Shifting to "+" once raises the shift range by one, and shifting to "-" lowers the shift range by one.

WIRING DIAGRAM

A0156EJE18

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT TRANSMISSION CONTROL SWITCH


    1. A0158UJE20
      Text in Illustration
      *a

      Component without harness connected

      (Transmission Control Switch)

      Disconnect the transmission control switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 (IG) - 7 (S) Shift lever in S, "+" and "-" Below 1 Ω
      2 (SFTU) - 5 (E)

      Shift lever continuously in "+"

      (Up-shift)

      		 Below 1 Ω
      1 (SFTD) - 5 (E)

      Shift lever continuously in "-"

      (Down-shift)

      		 Below 1 Ω
      3 (IG) - 7 (S) Shift lever not in S, "+" and "-" 10 kΩ or higher
      2 (SFTU) - 5 (E) Shift lever in S 10 kΩ or higher
      1 (SFTD) - 5 (E) Shift lever in S 10 kΩ or higher

    NG

    REPLACE TRANSMISSION CONTROL SWITCH (LOWER SHIFT LEVER ASSEMBLY) Click here

    OK

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


    1. A015DNVE36
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Transmission Control Switch)

      Disconnect the transmission control switch connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E52-3 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      E52-3 (IG) - Body ground Engine switch off Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E52-5 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A015CSFE44
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A38-25 (S) - Body ground

      • Engine switch on (IG)

      • Shift lever in S, "+" and "-"

      		 11 to 14 V
      A38-25 (S) - Body ground

      • Engine switch on (IG)

      • Shift lever not in S, "+" and "-"

      		 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
      A38-38 (SFTU) - Body ground

      Shift lever continuously in "+"

      (Up-shift)

      		 Below 1 Ω
      A38-27 (SFTD) - Body ground

      Shift lever continuously in "-"

      (Down-shift)

      		 Below 1 Ω
      A38-38 (SFTU) - Body ground Shift lever in S 10 kΩ or higher
      A38-27 (SFTD) - Body ground Shift lever in S 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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