Dtc P0724 Brake Switch B Circuit High

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Kd-Ftv Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)

INSPECT STOP LIGHT SWITCH ASSEMBLY

CHECK ECM (STP VOLTAGE)

REPLACE ECM

REPLACE STOP LIGHT SWITCH ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P0724 Brake Switch "B" Circuit High


DESCRIPTION

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

P0724
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
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.
Stop light switch 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).
  1. Short in stop light switch signal circuit
  2. Stop light switch assembly
  3. ECM

Related Data List
DTC No.
Data List
P0724
Stop Light Switch

WIRING DIAGRAM

Refer to DTC P0504 (HILUX_TGN26 RM000000XCT0Q6X_02.html).

INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
  2. After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK059X.html) and initialization (HILUX_TGN26 RM000000TIN057X.html).
  3. After replacing the fuel supply pump assembly, the ECM needs initialization (HILUX_TGN26 RM000000TIN057X.html).
  4. After replacing an injector assembly, the ECM needs registration (HILUX_TGN26 RM0000012XK059X.html).
HINT:
Read freeze frame data using the intelligent tester. 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.
1.READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Stop Light Switch.

  1. Read the value displayed on the tester when the brake pedal is depressed and released.

    OK:
    Brake Pedal
    		Display
    Released
    		OFF
    Depressed
    		ON


OK
Go to step 7

NG
Go to step 2

2.INSPECT STOP LIGHT SWITCH ASSEMBLY

  1. Inspect the stop light switch assembly (HILUX_TGN26 RM0000018VE00SX.html).



NG
Go to step 5
OK


3.CHECK ECM (STP VOLTAGE)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0724 Brake Switch B Circuit High

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Brake Pedal Condition
    		Specified Condition
    G149-8 (STP) - Body ground
    		Released
    		0 to 3 V
    Depressed
    		11 to 14 V
    Text in Illustration
    *a
    		Brake Pedal Depressed
    *b
    		Brake Pedal Released
    *c
    		Component with harness connected
    (ECM)


NG
Go to step 6
OK


4.REPLACE ECM

  1. Replace the ECM (HILUX_TGN26 RM0000013Z001HX.html).



NEXT
Go to step 7

5.REPLACE STOP LIGHT SWITCH ASSEMBLY

  1. Replace the stop light switch assembly (HILUX_TGN26 RM0000018VF00UX.html).



NEXT
Go to step 7

6.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


7.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X3X.html).

  1. Turn the ignition switch off for 30 seconds or more.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Start the engine.

  1. 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.

  1. Confirm that the DTC is not output again.

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

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

    2. Input DTC P0724.

    3. Check that STATUS is NORMAL.

      HINT:
      1. If STATUS is NORMAL, DTC judgment is complete and it can be determined that the system is normal.
      2. 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.

NEXT

END