Toyota Celica 2005 Repair Manual page 1004

DTC P0724
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling, while driving in lock−up condition, when
brakes are suddenly applied.
When the brake pedal is operated, this switch sends a signals to ECM. Then the ECM cancels operation
of the lock−up clutch while braking is in progress.
DTC No.
Stop light switch remains ON while vehicle running (2−trip
P0724
detection logic)
MONITOR DESCRIPTION
When the stop light switch remains ON during "stop and go" driving, the ECM interprets this as a fault in the
stop light switch and the MIL comes on and the ECM stores the DTC. The vehicle must stop and go (3 km/h
(2 mph) to 30 km/h (19 mph)) 5 times for two driving cycles in order to detect malfunction.
MONITOR STRATEGY
Related DTCs
Required sensors/Components
Required sensors/Components
Frequency of operation
Duration
MIL operation
Sequence of operation
TYPICAL ENABLING CONDITIONS
Item
The monitor will run whenever this DTC is
not present.
GO (Vehicle speed is 30 km/h (18.63
mph) or more)
STOP (Vehicle speed is less than 3 km/h
(1.86 mph))
TYPICAL MALFUNCTION THRESHOLDS
Detection criteria
Brake switch
WIRING DIAGRAM
See page DI−1068.
2005 CELICA (RM1131U)
DIAGNOSTICS
Brake Switch "B" Circuit High
DTC Detection Condition
P0724
Main
Sub
Continuous
GO and STOP 5 times
2 driving cycles
None
Minimum
− AUTOMATIC TRANSAXLE (U341E)
S Short in stop light switch signal circuit
S Stop light switch
S ECM
Stop light switch/Range check/Rationality
Stop light switch
Vehicle speed sensor
Specification
See page DI−758
Once
Once
Remain ON during GO and STOP 5 times
1003
Trouble Area
Maximum
Threshold
DI−803
DIAJB−03