DTC P0504-62: Brake Switch "A"/"B" Correlation - Signal compare failure: Action
WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, and 2016 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
- Vehicle Conditions to enable DTC Logging strategy
- Engine running
- Accelerator pedal NOT pressed
- Brake pedal pressed to over 50bar for longer than 2 seconds
- Prioritised Checks to Perform
- Check anti-lock brake system control module for vehicle speed related DTCs and refer to relevant DTC index
- Check brake pedal switch for correct adjustment
- Brake pedal switch circuit short circuit to ground, short circuit to power, open circuit, high resistance
- Inspect connectors for signs of water ingress, and pins for damage and/or corrosion
- Check and install a new brake pedal switch as required
- Start the engine and press the brake pedal, using maximum travel for more than 1 second, taking care not to press the accelerator pedal at the same time
- Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest