P0724

Schematic:

Circuit Description with 4T65-E Automatic Transaxle

The TCC brake switch indicates brake pedal status to the PCM. The TCC brake switch indicates that the brake pedal is either applied or released. The normally-closed switch supplies battery voltage to the PCM. Applying the brake pedal opens the TCC brake switch, interrupting voltage to the PCM. When the PCM receives 0 volts at the TCC brake switch input, the PCM turns OFF the Torque Convener Clutch Pulse Width Modulation (TCC PWM) solenoid valve.

If the PCM detects a closed TCC brake switch (indicating pedal released) during a number of decelerations, then DTC P0724 sets. DTC P0724 is a type C DTC.

CONDITIONS FOR RUNNING THE DTC
No VSS DTC P0502 or P0503.

CONDITIONS FOR SETTING THE DTC
The TCC brake switch indicates continuously CLOSED (12 volts) while the following conditions occur 8 times consecutively:
^ The vehicle speed is greater than 32 km/h (20 mph) for 6 seconds;
^ Then the vehicle speed decreases to 8 km/h (5 mph) and takes 3 seconds;
^ Finally, the vehicle speed is less than 8 km/h (5 mph).

ACTION TAKEN WHEN THE DTC SETS
^ The PCM does not illuminate the Malfunction Indicator Lamp (MIL).
^ The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Failure Records.
^ The PCM stores DTC P0724 in PCM history.

CONDITIONS FOR CLEARING THE DTC
^ A scan tool can clear the DTC.
^ The PCM clears the DTC from PCM history if the vehicle completes 40 consecutive warm-up cycles without a non-emission-related diagnostic fault occurring.
^ The PCM cancels the DTC default actions when the fault no longer exists and the ignition switch is OFF long enough in order to power down the PCM.

DIAGNOSTIC AIDS
^ Inspect the connectors at the controller, the component and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent and Poor Connections in Diagrams.
^ Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents in Diagrams.


TEST DESCRIPTION

Diagnostic Chart:

The numbers below refer to the step numbers on the diagnostic table.
2. A Scan Tool display that changes from Closed to Open when the TCC brake switch is disconnected indicates a faulty switch.