P0724

DTC P0724 (3.8L)





Circuit Description
The torque converter clutch (TCC) brake switch indicates brake pedal status to the transmission control module (TCM). The TCC brake switch indicates that the brake pedal is either applied or released. The normally-closed switch supplies battery voltage to the TCM. Applying the brake pedal opens the TCC brake switch, interrupting voltage to the TCM. When the TCM receives 0 volts at the TCC brake switch input, the TCM turns OFF the torque converter clutch pulse width modulation (TCC PWM) solenoid valve.

If the TCM 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.

DTC Descriptor
This diagnostic procedure supports this DTC:
DTC P0724 Brake Switch Circuit High Voltage

Conditions for Running the DTC
^ No VSS DTC P0722 or P0723.
^ DTC P0724 has not passed this ignition cycle.

Conditions for Setting the DTC
The TCC brake switch indicates continuously CLOSED (12 volts) while these conditions occur 8 times consecutively:
1. The vehicle speed is greater than 32 km/h (20 mph) for 6 seconds.
2. The vehicle speed is between 8 - 32 km/h (5 - 20 mph) for 3 seconds.
3. The vehicle speed is less than 8 km/h (5 mph).

Action Taken When the DTC Sets
^ The TCM does not request the ECM to illuminate the malfunction indicator lamp (MIL).
^ The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records.
^ The TCM stores DTC P0724 in TCM history.

Conditions for Clearing the DTC
^ A scan tool can clear the DTC.
^ The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring.
^ The TCM cancels the DTC default actions when the fault no longer exists and the DTC passes.








Test Description
This number refers to the step number on the diagnostic table.
3. If the scan tool indicates Closed in Step 2, and Open when the TCC brake switch is disconnected, the switch is stuck closed.