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Home >> Toyota >> 2005 >> ECHO 2D Sedan, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Automatic Transmission - U340E - Diagnostics) >> Circuit Inspection >> DTC P0724: Brake Switch "B" Circuit High >> Circuit Description

Circuit Description

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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.

Fig 1: DTC - P0724 Trouble Detection Chart
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