AUTOMATIC TRANSAXLE SYSTEM Transmission Control Switch Circuit

DESCRIPTION

After moving the shift lever to M, it is possible to switch the shift range between "1" (M1 range) and "6" (M6 range) using the transmission control switch.

Moving the shift lever to "+" once raises the shift range by one, and moving the shift lever to "-" once lowers the shift range by one.

WIRING DIAGRAM

A01KCWFE01

CAUTION / NOTICE / HINT

Note

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

Tech Tips


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

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

  • The malfunctioning area can be confirmed 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. A01KCP0C03
      *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 Condition Switch Condition Specified Condition
      G36-4 (IG) - Body ground Ignition switch ON 11 to 14 V
      G36-4 (IG) - Body ground Ignition 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 transmission control switch connector.

    2. A01KCP0C04
      *a

      Front view of wire harness connector

      (to Transmission Control Switch)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G36-2 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the transmission control switch connector.

    2. A01KCSUC06
      *A for LHD
      *a

      Component without harness connected

      (Transmission Control Switch)

      for LHD:

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      4 (IG) - 5 (S) Shift lever in M, "+" or "-" Below 1 Ω
      3 (SFTU) - 2 (E) Shift lever held in "+" (Up-shift) Below 1 Ω
      1 (SFTD) - 2 (E) Shift lever held in "-" (Down-shift) Below 1 Ω
      4 (IG) - 5 (S) Shift lever not in M, "+" or "-" 10 kΩ or higher
      3 (SFTU) - 2 (E) Shift lever in M 10 kΩ or higher
      1 (SFTD) - 2 (E) Shift lever in M 10 kΩ or higher
    3. A01KCSUC07
      *A for RHD
      *a

      Component without harness connected

      (Transmission Control Switch)

      for RHD:

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

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

    NG

    REPLACE TRANSMISSION FLOOR SHIFT ASSEMBLY Click here

    OK

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


    1. A01KCDLC04
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A61-9 (S) - Body ground

      • Ignition switch ON

      • Shift lever in M, "+" or "-"

      		 11 to 14 V
      A61-9 (S) - Body ground

      • Ignition switch ON

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

      		 Below 1 V

    4. Turn the ignition switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B76-61 (SFTU) - Body ground Shift lever held in "+" (Up-shift) Below 1 Ω
      A61-28 (SFTD) - Body ground Shift lever held in "-" (Down-shift) Below 1 Ω
      B76-61 (SFTU) - Body ground Shift lever in M 10 kΩ or higher
      A61-28 (SFTD) - Body ground 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