Stoplight Switch

DESCRIPTION
The stoplight switch tells the powertrain control module when the brakes are applied. The switch is closed when the brakes are applied and open when they are released. The PCM uses this signal to disengage the torque converter clutch when the brake is applied.

SYMPTOMS
Failed ON or not connected - torque converter clutch will not engage at less than one-third throttle.

Failed OFF - torque converter clutch will not disengage when brake is applied.

DIAGNOSTIC TROUBLE CODE
P1703