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Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> Automatic Transmission System >> DTC P0724 Brake Switch "B" Circuit High >> Description
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DTC P0724 Brake Switch "B" Circuit High: Description

The purpose of this circuit is to prevent the engine from stalling while driving in the lock-up condition when the brakes are suddenly applied.

When the brake pedal is depressed, this switch sends a signal to the TCM. Then the TCM cancels the operation of the lock-up clutch while braking is in progress.

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
P0724 Both of following conditions are met:
  • Stop light switch remains ON even when vehicle is driven in GO (30 km/h (18.63 mph) or more) and STOP (less than 3 km/h (1.86 mph)) pattern 5 times
  • 2 trip detection logic
  • Stop light switch
  • Short in stop light switch signal circuit
  • Harness and connector
  • TCM
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