AUTOMATIC TRANSAXLE SYSTEM Transmission Control Switch Circuit

DESCRIPTION

When the shift lever is in S and moved toward "-" or "+", it is possible to select different shift ranges (S1 to S6).

Moving the shift lever toward "+" increases the shift range by one, and moving the shift lever toward "-" decreases the shift range by one.

WIRING DIAGRAM

A01UEH3E02

CAUTION / NOTICE / HINT

Note

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

Tech Tips


  • Refer to the inspection procedure for the CAN communication system.

  • If the CAN communication system is malfunctioning, the TCM cannot receive current data from the ECM. In this case, the freeze frame data output from the TCM will have not been updated, and will not be useful for inspection. However, reading the Data List as the first step in troubleshooting is effective in helping find malfunctions.

  • The malfunction area can be checked by using the Bus Check function of the GTS.

    for LHD: Click here

    for RHD: Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (BATTERY - TRANSMISSION CONTROL SWITCH)


    1. Disconnect the G3 transmission control switch connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G3-4 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK POWER SOURCE CIRCUIT

    OK

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


    1. Disconnect the G3 transmission control switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G3-2 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)


    1. B006KZXC27
      *A for LHD
      *B for RHD
      *a

      Component without harness connected

      (Transmission Control Switch (Shift Lock Control Unit Assembly))

      Disconnect the G3 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 S, "+" or "-" Below 1 Ω
      Shift lever not in S, "+" or "-" 10 kΩ or higher
      3 (SFTU) - 2 (E)

      Shift lever held in "+"

      (Up shift)

      		 Below 1 Ω
      Shift lever not held in "+" 10 kΩ or higher
      1 (SFTD) - 2 (E)

      Shift lever held in "-"

      (Down shift)

      		 Below 1 Ω
      Shift lever not held in "-" 10 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      4 (IG) - 5 (S) Shift lever in S, "+" or "-" Below 1 Ω
      Shift lever not in S, "+" or "-" 10 kΩ or higher
      1 (SFTU) - 2 (E)

      Shift lever held in "+"

      (Up shift)

      		 Below 1 Ω
      Shift lever not held in "+" 10 kΩ or higher
      3 (SFTD) - 2 (E)

      Shift lever held in "-"

      (Down shift)

      		 Below 1 Ω
      Shift lever not held in "-" 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH) Click here

    OK

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


    1. Connect the G3 transmission control switch connector.

    2. Disconnect the A53 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
      A53-37 (S) - Body ground

      • Engine switch on (IG)

      • Shift lever in S, "+" or "-"

      		 11 to 14 V
      A53-37 (S) - Body ground

      • Engine switch on (IG)

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

      		 Below 1 V

    5. Turn the engine switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A53-34 (SFTU) - Body ground

      Shift lever held in "+"

      (Up shift)

      		 Below 1 Ω
      Shift lever not held in "+" 10 kΩ or higher
      A53-50 (SFTD) - Body ground

      Shift lever held in "-"

      (Down shift)

      		 Below 1 Ω
      Shift lever not held in "-" 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