AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0724/95

DTC Code DTC Name
P0724/95 Brake Switch "B" Circuit High

DESCRIPTION

The purpose of this circuit is to prevent the engine from stalling while driving in the lock-up condition when the brakes are suddenly applied.

When the brake pedal is depressed, this switch sends a signal to the TCM. Then the TCM cancels the operation of the lock-up clutch while braking is in progress.

DTC No. DTC Detection Condition Trouble Area
P0724/95 Stop light switch remains on even when the vehicle is driven in a stop (less than 3 km/h (2 mph)) and go (30 km/h (19 mph) or more) pattern 5 times (2 trip detection logic).

  • Short in stop light switch signal circuit

  • Stop light switch

  • TCM

MONITOR DESCRIPTION

This DTC indicates that the stop light switch remains on. When the stop light switch remains on during stop and go driving, the TCM interprets this as a fault in the stop light switch. Then the MIL illuminates and the TCM stores the DTC. The vehicle must stop (less than 3 km/h (2 mph)) and go (30 km/h (19 mph) or more) 5 times for 2 driving cycles in order for the DTC to be stored.

WIRING DIAGRAM

A01DWCME34

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING DATA LIST (STP SIGNAL)

    Tech Tips

    Using the Data List of the intelligent tester allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the Data List early in troubleshooting is one way to save time.


    1. Warm up the engine.

    2. Turn the ignition switch off.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch to ON and push the tester main switch on.

    5. Enter the following menus: Powertrain / ECT / Data List.

    6. Follow the instructions on the tester and read the Data List.

      TCM
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light Switch

      Stop light switch status/

      ON or OFF

      • Brake pedal is depressed: ON

      • Brake pedal is released: OFF

      		 -

      Note

      In the table above, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


    OK

    CHECK HARNESS AND CONNECTOR (TCM - BATTERY) Click here

    NG

  2. INSPECT STOP LIGHT SWITCH


    1. A01DYP3E04

      Remove the S14 stop light switch.

    2. Measure the resistance of the switch.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 - 2

      Pin pushed

      (pedal released)

      		 10 kΩ or higher
      3 - 4

      Pin not pushed

      (pedal depressed)

      		 10 kΩ or higher
      1 - 2

      Pin not pushed

      (pedal depressed)

      		 Below 1 Ω
      3 - 4

      Pin pushed

      (pedal released)

      		 Below 1 Ω

    NG

    REPLACE STOP LIGHT SWITCH

    OK

  3. CHECK HARNESS AND CONNECTOR (TCM - BATTERY)


    1. A01E18XE32

      Measure the voltage of the wire harness side connector.

      Standard Voltage
      Tester Connection Condition Specified Condition
      T38-14 (STP) - Body ground Brake pedal is depressed 10 to 14 V
      T38-14 (STP) - Body ground Brake pedal is released Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE TCM