AUTOMATIC TRANSMISSION SYSTEM Transmission Control Switch Circuit

DTC Code DTC Name
Transmission Control Switch Circuit

DESCRIPTION

After moving the shift lever to S, it is possible to switch the shift range between "1" (S1 range) and "6" (S6 range) using the transmission control switch.

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

WIRING DIAGRAM

C176192E20

PROCEDURE

  1. INSPECT TRANSMISSION CONTROL SWITCH

    1. C203344C03

      *a

      Component without harness connected

      (Transmission Control Switch)

      Disconnect the G36 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, "+" or "-"

      Below 1 Ω

      2 (SFTU) - 5 (E)

      Shift lever held in "+" (Up-shift)

      Below 1 Ω

      1 (SFTD) - 5 (E)

      Shift lever held in "-" (Down-shift)

      Below 1 Ω

      3 (IG) - 7 (S)

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

      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

      Result

      Result

      OK

      NG
    NG

    REPLACE TRANSMISSION CONTROL SWITCH (TRANSMISSION FLOOR SHIFT ASSEMBLY)

    Click here

    OK

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

    1. C203343C04

      *a

      Front view of wire harness connector

      (to Transmission Control Switch)

      Disconnect the G36 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

      G36-3 (IG) - Body ground

      Engine switch on (IG)

      11 to 14 V

      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

      G36-5 (E) - Body ground

      Always

      Below 1 Ω

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. C214334C03

      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the G45 ECM connector.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      G45-24 (S) - Body ground

      • Engine switch on (IG)

      • Shift lever in S, "+" or "-"

      11 to 14 V

      • Engine switch on (IG)

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

      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

      G45-16 (SFTU) - Body ground

      Shift lever held in "+" (Up-shift)

      Below 1 Ω

      G45-22 (SFTD) - Body ground

      Shift lever held in "-" (Down-shift)

      Below 1 Ω

      G45-16 (SFTU) - Body ground

      Shift lever in S

      10 kΩ or higher

      G45-22 (SFTD) - Body ground

      Shift lever in S

      10 kΩ or higher

      Result

      Result

      OK

      NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR