Description:

The fault code CAB 524166.03 is triggered when the CAB control unit detects an abnormally high voltage from the right brake pedal sensor. This condition suggests a potential issue within the sensor or its circuit, such as electrical overcharge or a malfunction that results in excessive voltage readings. This specific code pertains to vehicles equipped with the AutoPowr™ / IVT™ transmission system, which utilizes both a brake pedal sensor and a switch. Note that the PowerShift (PST) transmission does not incorporate a brake pedal sensor.

Reaction:

In response to detecting the high sensor voltage, the control unit commands the vehicle into a ‘PARK’ position to ensure safety. This measure prevents potential unintended vehicle movements and is recoverable following system correction.

Recommendations:

• Inspect Brake Pedal Sensor: Check the right brake pedal sensor for signs of damage or wear that might contribute to abnormal voltage outputs.
• Measure Sensor Voltage: Use a multimeter to measure the voltage output at the sensor while the brake pedal is in various positions. Compare these readings with manufacturer specifications to identify if the voltage is consistently higher than it should be.
• Examine Wiring and Electrical Connections: Look for any signs of damaged wiring, loose connections, or corrosion that could cause high voltage readings. Ensure all connections are secure and intact.
• Replace or Repair Faulty Sensor: If the sensor is found to be defective, replace it to ensure it accurately measures brake pedal position and pressure.
• Reset and Recalibrate the System: After making necessary repairs or replacements, recalibrate the sensor to ensure it functions correctly with the vehicle’s brake system. Reset the vehicle’s control unit to clear the fault code and exit the ‘PARK’ command.
• System Functionality Testing: Conduct a thorough testing of the brake system to ensure the new sensor operates correctly and that the high voltage issue has been resolved. Verify that the vehicle responds appropriately to brake pedal inputs under various conditions.

Note:

Regular maintenance and timely intervention are crucial for ensuring the safety and reliability of braking systems, particularly in vehicles equipped with advanced transmission systems like the AutoPowr™ / IVT™. Keeping sensor systems in good working order is essential to prevent operational hazards and ensure the vehicle operates safely and efficiently.