A/C - Whistling Noise On Start Up In 'AUTO' Mode
SI M 64 01 07Heating and Air Conditioning
June 2009
Technical Service
This Service Information bulletin supersedes SI M64 01 07 dated March 2007.
[NEW] designates changes to this revision
SUBJECT
IHKA Whistling Noise During Warm-up While in AUTO mode
MODEL
R56 (Cooper, Cooper S)
Vehicles produced up to February 28, 2007 with IHKA (SA 534)
SITUATION
A whistling noise may be noticed from the air area of the vent flaps in the dashboard. The noise appears during the warm-up phase of the vehicle, when the IHKA (Integrated Automatic Heating and Air Conditioning) is set to AUTO mode. The noise is most noticeable at ambient temperatures below 50°F (10°C).
CAUSE
Vent flap adjustment during warm-up phase
[NEW] PROCEDURE
Do not replace any parts.
This problem has been integrated into ISTA diagnostics. Follow the diagnostics and relevant test plan using the latest ISTA version. The test plan can be selected with the following path:
1. Perform Vehicle test
2. Select the "Fault pattern" tab from the "Fault memory" screen
3. Select "System oriented"
4. Select" 6400 heater and A/C systems"
5. Select "640025 Whistling noises from the instrument panel at low temperatures"
6. Select "Accept fault pattern"
7. Select "Calculate test plan"
8. Select test plan "ABL W6450_WAS12-Noise from dashboard at low temperatures"
9. Complete the test plan and perform the recommendations given by the test plan noted any "DIAGCODE" given at the end of the test plan.
WARRANTY INFORMATION
For information only