СИСТЕМА МЕХАНИЧЕСКОЙ ТРАНСМИССИИ "MULTIMODE" Parking Brake Switch Circuit

DESCRIPTION

The TCM detects the ON/OFF status of the parking brake switch. When the parking brake is applied, the parking brake switch turns ON. When the parking brake is released, the switch turns OFF.

Tech Tips

When the brake pedal is not depressed with the gear in 1st, 2nd or reverse, the clutch is half-engaged, even if the accelerator pedal is not depressed. As a result, the vehicle can creep slowly like an automatic transaxle vehicle. This assists the vehicle in preparing to move. The take off assist control is canceled while the parking brake switch is ON.

WIRING DIAGRAM

B004208E01
*a Parking Brake Switch Assembly

PROCEDURE


  1. INSPECT PARKING BRAKE SWITCH ASSEMBLY


    1. B0043NGC01
      *a

      Component without harness connected

      (Parking Brake Switch Assembly)
      *b ON
      *c OFF

      Remove the parking brake switch assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - Switch body

      OFF

      (When shaft pressed)

      		 10 kΩ or higher

      ON

      (When shaft released)

      		 Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PARKING BRAKE SWITCH ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (TCM - BODY GROUND)


    1. Connect the parking brake switch assembly connector.

    2. B00450MC12
      *a

      Front view of wire harness connector

      (to TCM)

      Disconnect the TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E104-4 (PKB) - Body ground OFF (Parking brake is released) 10 kΩ or higher
      ON (Parking brake is applied) Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT TCM


    1. Reconnect the TCM connector.

    2. B0044QAC13
      *a

      Component with harness connected

      (TCM)

      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
      E104-4 (PKB) - Body ground OFF (Parking brake is released) 11 to 14 V
      ON (Parking brake is applied) Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  4. REPLACE TCM


    1. Replace the TCM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  5. PERFORM INITIALIZATION


    1. Perform the initialization and learning procedure.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END