Description:

Error code CAB 524166.02 occurs when the CAB control unit detects a conflict between the voltage reading from the right brake pedal sensor and the state of the right brake pedal switch. Specifically, the sensor voltage is high while the switch is closed (indicating the pedal is pressed), or the sensor voltage is low while the switch is open (indicating the pedal is not pressed). This fault is specific to vehicles equipped with the AutoPowr™ / IVT™ transmission, which utilizes both a sensor and a switch for brake pedal operations. Vehicles with the PowerShift (PST) transmission do not use a brake pedal sensor.

Reaction:

The control unit reacts to this conflict by commanding the vehicle into a ‘PARK’ position to prevent possible unsafe conditions. This response is recoverable once the fault is corrected.

Recommendations:

• Inspect Brake Pedal Mechanism: Examine the brake pedal assembly to ensure it is functioning properly without mechanical hindrance that could affect the switch or sensor readings.
• Check Sensor and Switch Operation: Using diagnostic tools, check the operation of both the brake pedal sensor and the switch. Ensure that the sensor provides accurate voltage readings corresponding to the pedal’s position and that the switch changes state appropriately when the pedal is pressed and released.
• Verify Wiring and Connections: Inspect all associated wiring and connectors for damage, corrosion, or loose connections that might be causing incorrect voltage readings or signal loss.
• Calibrate the Brake Pedal Sensor: If the sensor and switch appear to be functioning mechanically, recalibrate the sensor to ensure it accurately reflects the pedal’s position.
• Replace Faulty Components: If the sensor, switch, or any associated wiring is found to be faulty, replace these components to resolve the conflict.
• Reset and Test the System: After addressing the issue, reset the vehicle’s control system to clear the fault code. Test the brake system thoroughly to ensure the conflict has been resolved and the system operates as intended under all conditions.

Note:

Maintaining accurate sensor and switch functionality in critical control systems like braking is essential for vehicle safety. Regular checks and maintenance should be performed to ensure these components continue to function correctly and to prevent conflicts that can lead to safety hazards.