CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM Transmission Control Switch Circuit

DTC Code DTC Name
Transmission Control Switch Circuit

DESCRIPTION

After moving the shift lever to M, it is possible to change the shift range between M1 and M7 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

C363318E01

CAUTION / NOTICE / HINT

Note:

  • Perform initialization when parts related to the continuously variable transaxle are replaced (Click here).

  • Check that no DTCs are stored after performing initialization (Click here).

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

PROCEDURE

  1. CHECK DTC OUTPUT

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    5. Read the DTCs using the GTS.

      Table 1. Result

      Result

      Proceed to

      DTCs are not output

      A

      DTCs are output

      B

    GO TO DTC CHART

    (Click here)

  2. READ VALUE USING GTS (SPORTS MODE SELECTION SW)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary.

    5. In accordance with the display on the GTS, read the Data List.

      Table 2. Engine and ECT

      Tester Display

      Measurement Item/Range

      Normal Condition

      Diagnostic Note

      Sports Mode Selection SW

      Sport mode select switch status/

      OFF or ON

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

      • ON: Shift lever in M, "+" or "-"

      -
      Table 3. Result

      Result

      Proceed to

      Data display is within Normal Condition range

      A

      Data display is not within Normal Condition range

      B

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

  3. READ VALUE USING GTS (SPORTS SHIFT UP SW AND SPORTS SHIFT DOWN SW)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary.

    5. In accordance with the display on the GTS, read the Data List.

      Table 4. Engine and ECT

      Tester Display

      Measurement Item/Range

      Normal Condition

      Diagnostic Note

      Sports Shift Up SW

      Sport shift up switch status/

      OFF or ON

      • OFF: Shift lever not held in "+" (up-shift)

      • ON: Shift lever held in "+" (up-shift)

      -

      • OFF: "+" shift paddle not operated (up-shift)

      • ON: "+" shift paddle operated and held (up-shift)

      Sports Shift Down SW

      Sport shift down switch status/

      OFF or ON

      • OFF: Shift lever not held in "-" (down-shift)

      • ON: Shift lever held in "-" (down-shift)

      -

      • OFF: "-" shift paddle not operated (down-shift)

      • ON: "-" shift paddle operated and held (down-shift)
      Table 5. Result

      Result

      Proceed to

      Data display is within Normal Condition range

      A

      Data display is not within Normal Condition range

      B

    CHECK FOR INTERMITTENT PROBLEMS

    (Click here)

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

    1. C199170E36

      Disconnect the shift lock control unit assembly (transmission control switch) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      5 (SFTU) - 11 (E)

      Shift lever held in "+"

      Below 1 Ω

      5 (SFTU) - 11 (E)

      Shift lever in M

      10 kΩ or higher

      4 (SFTD) - 11 (E)

      Shift lever held in "-"

      Below 1 Ω

      4 (SFTD) - 11 (E)

      Shift lever in M

      10 kΩ or higher
      Table 6. Text in Illustration

      *a

      Component without harness connected

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

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)

    (Click here)

  5. CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - BODY GROUND)

    U122885E02

    1. Disconnect the shift lock control unit assembly (transmission control switch) connector.

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

    Standard Resistance

    Tester Connection

    Condition

    Specified Condition

    H48-11 (E) - Body ground

    Always

    Below 1 Ω
    Table 7. Text in Illustration

    *a

    Front view of wire harness connector

    (to Transmission Control Switch)

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - BODY GROUND)

  6. CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM)

    U123378E02

    1. Disconnect the ECM connector.

    2. Disconnect the H130 spiral cable sub-assembly connector (Click here).

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A76-43 (SFTD) - Body ground

      Shift lever held in "-"

      Below 1 Ω

      A76-43 (SFTD) - Body ground

      Shift lever in M

      10 kΩ or higher

      A76-42 (SFTU) - Body ground

      Shift lever held in "+"

      Below 1 Ω

      A76-42 (SFTU) - Body ground

      Shift lever in M

      10 kΩ or higher
      Table 8. Text in Illustration

      *a

      Front view of wire harness connector

      (to ECM)

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM)

  7. REPLACE ECM

    1. Replace the ECM (Click here).

    PERFORM INITIALIZATION

    (Click here)

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

    1. C199170E37

      Disconnect the shift lock control unit assembly (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

      6 (IG) - 13 (S)

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

      10 kΩ or higher
      Table 9. Text in Illustration

      *a

      Component without harness connected

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

    REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)

    (Click here)

  9. INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH (POWER SOURCE))

    1. U122883E02

      Disconnect the shift lock control unit assembly (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

      H48-6 (IG) - Body ground

      Ignition switch ON

      11 to 14 V

      H48-6 (IG) - Body ground

      Ignition switch off

      Below 1 V
      Table 10. Text in Illustration

      *a

      Front view of wire harness connector

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

    CHECK POWER SOURCE CIRCUIT (TRANSMISSION CONTROL SWITCH)

  10. CHECK HARNESS AND CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM)

    1. Disconnect the H48 shift lock control unit assembly (transmission control switch) connector.

    2. Disconnect the A76 ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H48-13 (S) - A76-59 (S)

      Always

      Below 1 Ω

      H48-13 (S) - Body ground and other terminals

      Always

      10 kΩ or higher

      A76-59 (S) - Body ground and other terminals

      Always

      10 kΩ or higher

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM)

  11. REPLACE ECM

    1. Replace the ECM (Click here).

    PERFORM INITIALIZATION

    (Click here)