A/C - Symptom Diagnosis Information
SI B 64 04 07Heating and Air Conditioning
November 2007
Technical Service
This Service Information bulletin supersedes S.I. B64 04 07 dated April 2007.
[NEW] designates changes to this revision
SUBJECT
Heating and Air Conditioning Symptom Diagnosis
MODEL
E90, E91, E92, E93 (3 Series)
[NEW] E60, E61 (5 Series)
[NEW] E63, E64 (6 Series)
[NEW] E70 (X5)
SITUATION
With the release of DIS V48 and DIS V49 symptom troubleshooting has now been expanded to include the heating and air conditioning system as it relates to mechanical and electro-mechanical faults. NEW Always use the current diagnostic software whenever performing symptom troubleshooting.
CAUSE
Due to the complexity of current vehicle systems and the use of distributed functions, it is becoming more difficult to test and repair these systems using straightforward fault code diagnosis. Also in most cases, faults stored are not relevant when it comes to the actual customer complaint, even if a fault is present.
The information in symptom diagnosis was based on technician feedback and experiences in dealing with these symptoms.
PROCEDURE
1. Identify the exact customer complaint.
2. Perform a short test using [NEW] DIS V51 or higher.
3. Page right to the "Diagnosis Fault symptom selection" screen.
4. Select "6400 Heater and A/C systems".
5. NEW At this point select the symptom which best fits the customer complaint. The following selections are available (note: symptoms may vary slightly with each new DIS version and model selection).
^ "640001 Malfunction, fan"
^ "640002 Malfunction, recirculated air"
^ "640003 No/insufficient cooling capacity"
^ "640004 No heat output"
^ "640006 Reduced cooling output"
^ "640007 Incorrect function of rear-cabin stratification flaps"
^ "640011 A/C system causes noises"
^ "640014 Unpleasant smells in the vehicle interior"
^ [NEW]"640015 Seat heating unlike steering-wheel heating still active after renewed engine start"
^ [NEW] "640016 The AC-system fan only delivers hot air after an extended period of driving"
6. Once the symptom is selected, push the "Transfer" button to move the symptom into the "Accepted symptoms" field.
7. Page right and highlight the test plan associated with your symptom selection.
8. Start the test plan and finish the diagnosis.
Warranty claims may be denied:
1. If not supported by diagnostic test plans (transferred via FASTA). Be sure to include the "Diagnostic code" in the comments section of the warranty claim.
2. If the latest diagnostic software is not used.
Covered under the terms of the BMW New Vehicle Limited Warranty.
Please refer to the latest KSD for all applicable labor operations and allowances.
If the appropriate labor operation is not contained in KSD, then a work time labor operation should be used.
Defect Code: Refer to KSD
Disclaimer