TRANSMISSION CONTROL SYSTEM (4L30–E)
7A1–55
DTC P0724 Brake Switch Circuit High (Stuck Off)
LHD
D07R200047
RHD
D07R200048
Circuit Description:
The brake switch indicates brake pedal status to the
Powertrain Control Module (PCM). The brake switch is a
normally–closed switch that supplies battery voltage on
circuit ORN to the PCM. Applying the brake pedal opens
the switch, interrupting voltage to the PCM. When the
brake pedal is released, the PCM receives a constant
voltage signal. If the PCM receives a zero voltage signal
at the brake switch input, and the Torque Converter
Clutch (TCC) is engaged, the PCM de–energizes the
Torque Converter Clutch Solenoid Valve (TCC Sol.
Valve). The PCM disregards the brake switch input for
TCC scheduling if there is a brake switch circuit fault
(Refer to Diagnostic Aids).
When the PCM detects a closed brake switch circuit (12
volts, high input) during decelerations, then DTC P0724
sets. DTC P0724 is a type D DTC.
Conditions For Setting The DTC
D
No OSS Assy. DTCs P0722 or P0723.
D
The PCM detects a closed brake switch circuit (12
volts) without changing and the following events
occur seven consecutive times:
D
The vehicle speed is greater than 32 km/h (20 mph)
for 4 seconds;
D
then the vehicle speed is between 8–32 km/h (5–20
mph) for 4 seconds;
D
then the vehicle speed is less than 8 km/h (5 mph).