Brake Pressure Modulator Valve Adaptive Pressure Calibration (RPO UGN)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
The adaptive pressure control learn is not required the learn will automatically perform a maintenance run every 200 - 300 ignition cycles at vehicle speeds between (40 - 50 mph). If a customer is concerned about an intermittent humming or buzzing noise perform this adaptive pressure control learn to determine if this is what the customer heard.
The adaptive pressure control learn can be completed with a scan tool using the following steps:
- Place the vehicle on a flat level surface.
- Maintain the system voltage by connecting a battery charger.
- Apply the parking brake or set the transmission in the Park.
- Release the brake pedal.
- Install the scan tool to the data link connector.
- Engine running
- Turn Off or disable systems that may put a load on the vehicles battery such as; interior lights, exterior lights (including daytime running lights), HVAC, radio, etc.
- Select Adaptive Pressure Control Learn in the Brake System Control Module Configuration/Reset Functions list.
- Follow the scan tool directions to complete the calibration learn procedure.
- Clear any DTCs that may be set.