When replacing the brake pads on vehicles with Electro-Mechanical Parking Brake control modules is is critical that ALL of the Caution and Prerequisite notes are followed as listed above under: Basic Settings. This can cause damage to various control modules including the - Parking Brake module. The battery management module will not see the current flow and shut off power to other modules. Attaching the charger directly to the positive and negative terminals of the battery is Not correct.The proper procedure should be found in the repair manual. On vehicles using a separate battery management control module, make sure the charger is connected properly.The status of the Longitudinal Acceleration Sensor (G251) is now being displayed. Do NOT move/rock car while performing basic setting.Wait 30 seconds after the the brakes stop making noise. The brake pads are now opening and closing 3 times. This should stop after cycling the Parking Brake ON, then OFF again. The LED in the parking brake switch and the warning lamp in the instrument cluster will probably continue to blink rapidly. Connect a battery charger as per repair manual.The caliper pistons do not move back into the caliper, this is normal. It is normal for the LED in the parking brake switch and the warning lamp in the instrument cluster to blink rapidly at this point. The brake calipers will then open, allowing the pads to be changed. Cycle the Parking Brake ON, then OFF first.Some A6 vehicles do not have the battery charger hook up points under the hood.Connect a battery charger as per repair manual, click photo to enlarge.
It is strongly recommended to run a full Auto-Scan first thing to check for any preexisting faults! There have been several reports of repair shops damaging the Electronic Parking Brake System when trying to do rear brakes, but not telling the customer and then sending the car out the door.If you skip any prerequisites or other steps here, you are likely to experience "issues" for which no documented resolutions exist, in which case we will not be able to help you resolve them.
2.5 Longitudinal Acceleration Sensor (G251) Intentionally blank: Intentionally blank: Related Parts.