CONTINUOUSLY VARIABLE 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 "7" (M7 range) using the transmission control switch.

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

WIRING DIAGRAM

A005MAFE01

PROCEDURE


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


    1. A005JWTE27
      Text in Illustration
      *a

      Component without harness connected

      (Transmission Control Switch (Shift lock control unit assembly))

      Disconnect the F25 transmission control switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      6 (IG) - 13 (S) Shift lever in M, "+" or "-" Below 1 Ω
      5 (SFTU) - 11 (E) Shift lever held in "+" (Up-shift) Below 1 Ω
      4 (SFTD) - 11 (E) Shift lever held in "-" (Down-shift) Below 1 Ω
      6 (IG) - 13 (S) Shift lever not in M, "+" or "-" 10 kΩ or higher
      5 (SFTU) - 11 (E) Shift lever in M 10 kΩ or higher
      4 (SFTD) - 11 (E) Shift lever in M 10 kΩ or higher

    NG

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

    OK

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


    1. A005ISLE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Transmission Control Switch (Shift lock control unit assembly))

      Disconnect the F25 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
      F25-6 (IG) - Body ground Ignition switch ON 11 to 14 V
      F25-6 (IG) - Body ground Ignition switch off Below 1 V

    3. Turn the ignition switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F25-11 (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. Disconnect the A58 ECM connectors.

    2. Turn the ignition switch to ON.

    3. A005KBWE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A58-41 (S) - Body ground

      • Ignition switch ON

      • Shift lever in M, "+" or "-"

      		 11 to 14 V
      A58-41 (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
      A58-42 (SFTU) - Body ground Shift lever held in "+" (Up-shift) Below 1 Ω
      A58-43 (SFTD) - Body ground Shift lever held in "-" (Down-shift) Below 1 Ω
      A58-42 (SFTU) - Body ground Shift lever in M 10 kΩ or higher
      A58-43 (SFTD) - Body ground Shift lever in M 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  5. PERFORM INITIALIZATION

    Note


    • Performing reset memory will clear the learned values of both the yaw rate sensor (deceleration sensor 0 point calibration) and CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate sensor 0 point calibration and CVT oil pressure calibration when replacing any of the parts shown in the following table:

      Replaced Part

      • Continuously variable transaxle assembly

      • ECM

      • Skid control computer (w/o VSC)

      • Oil pressure sensor

      • Deceleration sensor (w/o VSC)

      • Airbag sensor assembly (Yaw rate sensor) (w/ VSC)

    • After performing reset memory, always perform yaw rate sensor (deceleration sensor 0 point) calibration first, and then CVT oil pressure calibration.

    • Always perform 0 point calibration with the vehicle on level ground.

    • Do not shake or vibrate the vehicle during 0 point calibration.


    1. Using the intelligent tester, perform reset memory, deceleration sensor 0 point calibration and CVT oil pressure calibration Click here.

    2. Check that no DTC is stored.


    NEXT

    END