Check PTS sensors for sensitivity - AF54.65-P-2002-01A

The following tests allows PTS sensors which react too sensitively to be found.

Prerequisites for testing:

• Important:  It must be windstill at the testing location!
• No current or stored DTC's in DTC memory.
• The cooling water temperature in the vehicle in question must be > 80 °C.
• Do not  shut off engine.

1. Connect STAR DIAGNOSIS.
2. Call up actual values for front Parktronic sensors.
3. Move vehicle forward in front of an obstacle (e.g. house wall, garage door), until 1 or 2 segments come on in the warning display.

   If none of the sensors react after 10 min:

   ↓

4. Move vehicle closer to obstacle until 3 or 4 segments come on in the warning display.
5. Observe the actual values and read off whether sensors indicate different distances.

   This test can require up to 30 min before a sensor indicates different values during measurement.

   The following deviations/variations when reading off the actual values in STAR DIAGNOSIS are not critical: Jumps in actual values/readings less than 10 cm and jumps alternating from readings such as 80 cm to 255 cm.

   Example:

   • Reading = 110 cm, reading jumps occasionally between 100 cm and 120 cm → not critical
   • Reading = 110 cm, reading jumps occasionally to 255 cm → not critical
   • Reading = 110 cm, reading jumps occasionally to 70 cm → critical

     ↓

6. Remove/install/replace only these sensors.