Description:

Error code CAB 524169.03 is triggered when the CAB control unit detects an unusually high voltage from the left brake pedal sensor. This abnormal voltage may indicate a malfunction within the sensor itself, or an issue in the associated wiring or electrical circuitry. This code applies to vehicles equipped with the AutoPowr™ / IVT™ transmission, which integrates both a sensor and a switch on the brake pedal to monitor and control braking functions.

Reaction:

The control unit responds to this high voltage reading by commanding the vehicle into a ‘PARK’ position to prevent unintended or unsafe movements. This safety protocol is recoverable once the issue has been properly addressed and the system is reset.

Recommendations:

• Inspect the Brake Pedal Sensor: Check the left brake pedal sensor for any signs of damage or wear that could contribute to high voltage outputs. Ensure that the sensor is properly installed and aligned.
• Test Sensor Voltage Output: Using a multimeter, measure the voltage output from the sensor while the brake pedal is engaged and disengaged. Compare these readings with the manufacturer’s specifications to identify if the voltage consistently exceeds normal levels.
• Examine Wiring and Connectors: Inspect the wiring and connectors leading to and from the brake pedal sensor. Look for damaged wires, loose connections, or signs of corrosion that could affect voltage readings.
• Replace or Repair Faulty Components: If the sensor or any part of the electrical circuit is found to be faulty, replace or repair these components to ensure accurate voltage regulation and sensor operation.
• Recalibrate the Sensor: After any necessary repairs are made, recalibrate the brake pedal sensor to ensure it accurately reflects the pedal’s position and force.
• Reset the Control System and Test: Clear any stored fault codes and reset the control system. Test the vehicle under various conditions to ensure that the brake pedal sensor now operates within normal voltage parameters and that the ‘PARK’ command is no longer triggered erroneously.

Note:

Regular maintenance and calibration of brake pedal sensors are crucial in vehicles with advanced transmission systems like the AutoPowr™ / IVT™. Ensuring that these sensors function correctly is essential for vehicle safety and performance. Scheduled diagnostics can help detect and address such issues before they lead to more significant problems or safety concerns.