Adaptive Cruise Control, General Information
Distance regulation sensor and Distance Regulation Control Module -J428- are installed in one housing. If sensor/control module is faulty, entire unit must be replaced.
In the following description, the sensor/control module unit is identified as the "sensor".
The sensor is located behind the front bumper right air intake grille.
Malfunctions can occur due to contamination on the sensor. Remove the air intake grille in front of the sensor according to the repair information and clean the sensor.
Before performing ACC adjustment, DTC memory must be interrogated and malfunctions corrected.
ACC control module "measured value block 2" shows whether sensor is only slightly misaligned.
The ACC adjustment may only be set using a VW/Audi-approved wheel alignment tester and adjustment device!
A correct adjustment is required for perfect ACC function.
A new adjustment is necessary if:
The rear axle toe was adjusted.
The complete Adaptive Cruise Control Sensor -G550- was replaced.
Alignment work performed on the right longitudinal member.
The lock carrier was loosened or adjusted.
There is damage to the lock carrier.
The adjustment angle is greater than -0.8° to +0.8°.