Toyota Celica 2005 Repair Manual page 917

DI−716
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))
Battery voltage
Starter
Ignition switch
TYPICAL MALFUNCTION THRESHOLDS
Detection criteria
Brake switch
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
8 V or more
− AUTOMATIC TRANSAXLE (U240E)
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 pageDI−669
Once
Once
OFF
ON
Threshold
Remain ON during GO and STOP 5 times
916
Trouble Area
Maximum
−
DI4Z1−07