Technical Service Bulletin # 642105
Date: 1005012010 BMW 750Li (F02) V84.4L Turbo (N63)
Page 333
A/C Compressor Noise Troubleshooting
SI B 64 21 05
Heating and Air Conditioning
May 2010
Technical Service
This Service Information bulletin supersedes SI B64 21 05 dated May 2008.
[NEW] designates changes to this revision
SUBJECT
Troubleshooting Air Conditioning Compressor Noise
MODEL
All
SITUATION
A high percentage of air conditioning compressors which are returned under warranty for complaints of noisy operation have been found
to be nondefective.
PROCEDURE
[NEW] This procedure only applies to compressor noise diagnosis that does not require a DIAGCODE as per SI B01 01 10. For these
vehicles, complete the mechanical diagnosis test plan in ISTA (Integrated Service Technical Application). This test plan can be found by
performing a text search using the search term "M6450", or by selecting the following path: "Function structure / Body / Heating and Air
Conditioning systems" and "Start search".
In order to assist with the diagnosis of noisy compressors, a "Check Sheet" has been developed to assist the workshop with gathering
information from the customer to ensure proper diagnosis the first time. Please return this "Check Sheet" with any replaced compressor.
Check to see whether a relevant fault symptom is available, using fault symptom diagnosis. Refer to SI B64 04 07 for more information
on how to access fault symptom troubleshooting.
If no fault symptom is available, please use the attached "Compressor Noise Diagnosis" chart when diagnosing any air conditioning
compressor noises.
WARRANTY INFORMATION
For information only
ATTACHMENTS2010 BMW 750Li (F02) V84.4L Turbo (N63)
view PDF attachment B642105Customer_Checksheet.
10.52SS
Page 3342010 BMW 750Li (F02) V84.4L Turbo (N63)
Page 335
view PDF attachment B642105Diagnosis_Flowchart.
Date: 1005012010 BMW 750Li (F02) V84.4L Turbo (N63)
Page 333
A/C Compressor Noise Troubleshooting
SI B 64 21 05
Heating and Air Conditioning
May 2010
Technical Service
This Service Information bulletin supersedes SI B64 21 05 dated May 2008.
[NEW] designates changes to this revision
SUBJECT
Troubleshooting Air Conditioning Compressor Noise
MODEL
All
SITUATION
A high percentage of air conditioning compressors which are returned under warranty for complaints of noisy operation have been found
to be nondefective.
PROCEDURE
[NEW] This procedure only applies to compressor noise diagnosis that does not require a DIAGCODE as per SI B01 01 10. For these
vehicles, complete the mechanical diagnosis test plan in ISTA (Integrated Service Technical Application). This test plan can be found by
performing a text search using the search term "M6450", or by selecting the following path: "Function structure / Body / Heating and Air
Conditioning systems" and "Start search".
In order to assist with the diagnosis of noisy compressors, a "Check Sheet" has been developed to assist the workshop with gathering
information from the customer to ensure proper diagnosis the first time. Please return this "Check Sheet" with any replaced compressor.
Check to see whether a relevant fault symptom is available, using fault symptom diagnosis. Refer to SI B64 04 07 for more information
on how to access fault symptom troubleshooting.
If no fault symptom is available, please use the attached "Compressor Noise Diagnosis" chart when diagnosing any air conditioning
compressor noises.
WARRANTY INFORMATION
For information only
ATTACHMENTS2010 BMW 750Li (F02) V84.4L Turbo (N63)
view PDF attachment B642105Customer_Checksheet.
10.52SS
Page 3342010 BMW 750Li (F02) V84.4L Turbo (N63)
Page 335
view PDF attachment B642105Diagnosis_Flowchart.
