Showing posts with label A/C - Compressor Noise Troubleshooting. Show all posts
Showing posts with label A/C - Compressor Noise Troubleshooting. Show all posts

Tuesday, January 8, 2019

A/C - Compressor Noise Troubleshooting

2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) Technical Service Bulletin # 642105 Date: 100501



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



2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 330



non-defective.



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



ATTACHMENTS



2010 BMW 335Cic Convertible (E93) L6-3.0L Turbo (N54) 331



view PDF attachment B642105Customer_Checksheet.



view PDF attachment B642105Diagnosis_Flowchart.