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Home >> Ford >> 1997 >> Explorer 2WD V6-245 4.0L VIN X SFI >> Repair and Diagnosis >> Powertrain Management >> Transmission Control Systems >> Testing and Inspection >> Diagnostic Trouble Code Descriptions >> Brake On/Off (BOO Switch)
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Brake On/Off (BOO Switch)

DESCRIPTION
- The Brake ON/OFF (BOO) switch is connected to the brake pedal and signals the Powertrain Control Module (PCM) when the brakes are applied.
- When the brakes are applied the BOO switch closes sending a voltage signal to the PCM.
- When the brakes are released the BOO switch is open and the PCM receives no voltage signal.
- When the BOO switch signals the PCM that the brakes are applied, the PCM may release the Torque Converter Clutch (TCC).

SYMPTOMS:
- Failed ON - torque converter clutch will not engage at less than 1/3 throttle.
- Failed OFF or not connected - torque converter clutch.

DIAGNOSTIC TROUBLE CODE:
P1703


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