AUTOMATIC TRANSAXLE SYSTEM Transmission Control Switch Circuit

DESCRIPTION

When the shift lever is in S and it is moved toward "-" or "+", it is possible to select different shift ranges (1st through 6th ranges).

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

A01ETJDE01

INSPECTION PROCEDURE

Note

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

Tech Tips


  • Refer to inspection procedure for CAN communication system.

  • If the CAN communication malfunctions, the TCM cannot receive the 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 effective to find malfunctions.

  • The malfunction area can be checked using the Bus Check function on the intelligent tester Click here.

PROCEDURE


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


    1. A01ETWKE01
      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 Condition Condition Specified Condition
      l44-4 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    NG

    CHECK POWER SOURCE CIRCUIT

    OK

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


    1. A01ETWKE02
      Text in Illustration
      *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
      l44-2 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT LOWER SHIFT LEVER ASSEMBLY (TRANSMISSION CONTROL SWITCH)


    1. A01EV2FE06
      Text in Illustration
      *a

      Component without harness connected

      (Transmission Control Switch)

      Measure the resistance between each terminal of the transmission control switch when the shift lever is moved to each position.

      Standard Resistance
      Tester Connection Condition Specified Condition
      l44-4 (IG) - l44-5 (S) Shift lever in S, "+" or "-" Below 1 Ω
      Shift lever not in S, "+" or "-" 10 kΩ or higher
      l44-3 (SFTU) - l44-2 (E)

      Shift lever held in "+"

      (Up-shift)

      		 Below 1 Ω
      Shift lever not held in "+" 10 kΩ or higher
      l44-1 (SFTD) - l44-2 (E)

      Shift lever held in "-"

      (Down-shift)

      		 Below 1 Ω
      Shift lever not held in "-" 10 kΩ or higher

    NG

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

    OK

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


    1. Connect the transmission control switch connector.

    2. A01EWA6E11
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the 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
      A25-37 (S) - Body ground

      • Engine switch on (IG)

      • Shift lever in S, "+" or "-"

      		 11 to 14 V
      A25-37 (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
      A25-34 (SFTU) - Body ground

      Shift lever held in "+"

      (Up-shift)

      		 Below 1 Ω
      Shift lever not held in "+" 10 kΩ or higher
      A25-50 (SFTD) - Body ground

      Shift lever held in "-"

      (Down-shift)

      		 Below 1 Ω
      Shift lever not held in "-" 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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