Input/Turbine Speed Sensor Circuit Torque Converter/Brake Switch B Circuit High

Replace the Brake Pedal Position Sensor/Switch (Brake Switch B): If testing confirms the brake switch B circuit is consistently sending a "high" voltage signal when it shouldn't, or if the switch is internally shorted, replacing this component is the most direct solution.

Repair or Replace Damaged Wiring/Connectors: Address any identified shorts to voltage, open circuits, chafed insulation, or corroded/loose terminals within the wiring harness for either the input/turbine speed sensor or the brake switch B circuit. This often involves splicing in new wire sections or replacing connector pigtails.

Replace the Input/Turbine Speed Sensor: If the sensor itself is found to be faulty after thorough testing (e.g., incorrect resistance, no signal, or an erratic signal that doesn't correlate with actual input shaft speed), replacing it will resolve the issue.

Diagnose and Repair Short to Voltage in Shared Circuits: In some vehicles, these circuits might share a common power or ground source, or run in close proximity. If a short to voltage is identified in a shared harness section, isolating and repairing that specific short will resolve the "high" condition for the affected circuit.