СИСТЕМА ECD, Diagnostic DTC:P0724

DTC Code DTC Name
P0724 Brake Switch "B" Circuit High

DESCRIPTION

This DTC indicates that the stop light switch assembly remains ON. When the stop light switch assembly remains ON during GO and STOP driving, the ECM interprets this as a fault in the stop light switch assembly. Then the MIL illuminates and the ECM stores the DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0724 Brake Switch "B" Circuit High Stop light switch assembly remains on even when vehicle is driven in GO (30 km/h (19 mph) or more) and STOP (less than 3 km/h (1.8 mph)) pattern 5 times (2 trip detection logic).
  • Short in stop light switch assembly signal circuit

  • Stop light switch assembly

  • ECM

Comes on DTC stored
Table 1. Related Data List
DTC No. Data List
P0724 Stop Light Switch

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P0724 Accelerate the vehicle to 30 km/h (19 mph) or more, depress the brake pedal and decelerate the vehicle to 3 km/h (1.8 mph) or less 5 times.

WIRING DIAGRAM

Refer to DTC P0504.

Click hereНажмите здесь

CAUTION / NOTICE / HINT

Note:
  • Inspect the fuses of circuits related to this system before performing the following procedure.

  • After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click hereНажмите здесь).

Tip:

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE

  1. READ VALUE USING GTS (STOP LIGHT SWITCH)

    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 / All Data / Stop Light Switch.

      Powertrain > Engine and ECT > Data List
      Tester Display
      Stop Light Switch
    5. Read the value displayed on the GTS when the brake pedal is depressed and released.

      OK
      Brake Pedal Display
      Released OFF
      Depressed ON
      Result
      Proceed to
      OK
      NG
    OK Нажмите здесь

    GO TO STEP 6


    NG
  2. INSPECT STOP LIGHT SWITCH ASSEMBLY

    1. Inspect the stop light switch assembly.

      Click hereНажмите здесь

      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  3. CHECK TERMINAL VOLTAGE (STP VOLTAGE)

    1. Disconnect the ECM connector.

      A012IJQC04
      *a Brake Pedal Depressed
      *b Brake Pedal Released
      *c

      Front view of wire harness connector

      (to ECM)

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Brake Pedal Condition Specified Condition
      A118-35 (STP) - Body ground Released Below 1.5 V
      Depressed 7.5 to 14 V
      Result
      Proceed to
      OK
      NG
    NG Нажмите здесь

    OK
  4. REPLACE ECM

    1. Replace the ECM.

      Click hereНажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 6


  5. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT
    NEXT
  6. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs
    5. Turn the ignition switch off for 30 seconds or more.

    6. Start the engine and turn the GTS on.

    7. Accelerate the vehicle to 30 km/h (19 mph) or more, depress the brake pedal and decelerate the vehicle to 3 km/h (1.8 mph) or less 5 times or more.

      ОСТОРОЖНО

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    8. Confirm that the DTC is not output.

      Tip:

      Perform the following procedure using the GTS to determine whether or not the DTC judgment has been carried out.

      1. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

        Powertrain > Engine and ECT > Utility
        Tester Display
        All Readiness
      2. Input DTC P0724.

      3. Check that STATUS is NORMAL.

        Tip:
        • If STATUS is NORMAL, DTC judgment is complete and the system is determined to be normal.

        • If STATUS is INCOMPLETE or N/A, DTC judgment is incomplete. Perform the following procedure again 5 times: accelerate the vehicle to 30 km/h (19 mph) or more, depress the brake pedal and decelerate the vehicle to 3 km/h (1.8 mph) or less.

      Result
      Proceed to
      NEXT
    NEXT

    END


  7. REPLACE STOP LIGHT SWITCH ASSEMBLY

    1. Replace the stop light switch assembly.

      Click here Нажмите здесь

      Result
      Proceed to
      NEXT
    NEXT Нажмите здесь

    GO TO STEP 6