2002 Chevy Malibu P0724

DTC P0724: BRAKE SWITCH CIRCUIT HIGH INPUT
NOTE:For circuit identification, see CONNECTOR IDENTIFICATION and/or WIRING DIAGRAMS.

Circuit Description
The brake switch is used to indicate brake pedal status to PCM. Normally closed brake switch supplies battery voltage to PCM. When brake pedal is applied, brake switch opens, interrupting voltage to PCM. When brake pedal is released, voltage is constant to PCM. When PCM sees zero volts at brake switch input, PCM de-energizes TCC solenoid. DTC P0724 will set when PCM detects a closed (stuck off) brake switch during deceleration.
Conditions For Running DTC
DTC will run under the following conditions:
Ignition is on.
System voltage is 8-18 volts.
Conditions For Setting DTC
DTC will set under the following conditions:
PCM detects a closed brake switch circuit (12 volts) during deceleration and following conditions occur 8 consecutive times: Vehicle speed is greater than 20 MPH for 6 seconds, then vehicle speed is 5-20 MPH for 3 seconds, then vehicle speed is less than 5 MPH.
Action Taken By PCM

P0724
The purpose of this circuit is to prevent the engine from stalling while driving in lock-up condition, when
the brakes are suddenly applied.
When the brake pedal is depressed, this switch sends signals to the ECM. Then the ECM cancels the
operation of the lock-up clutch while braking is in progress.