NHTSA ID Number: 10161554
Manufacturer Communication Number: B121619
TSB/Document Date: 2019-06-24
Summary
ERRONEOUS ELECTRIC FAN FUNCTION FAULT STORED IN THE DME. The following faults may be erroneously stored in the Digital Motor Electronics (DME): And: There is no customer-facing vehicle symptom(s) or related check control message displayed. A software error may cause these faults to be erroneously stored in the Digital Motor Electronics (DME).
TIS Service Bulletin
Page 1 of 2
SI B12 16 19
Engine Electrical Systems
May 2019
Technical Service
ERRONEOUS ELECTRIC FAN FUNCTION FAULT STORED IN
THE DME
MODEL
G01 (X3 Sports Activity
Vehicle)
G02 (X4 Sports Activity
Vehicle)
G12 (7 Series
Sedan)
G30 (5 Series
Sedan)
G32 (6 Series Gran
Turismo)
Equipped with the B46O, B58M, or XB1H engine
SITUATION
The following faults may be erroneously stored in the Digital Motor Electronics (DME):
Fault code:
Control module:
Fault code text:
1A2806
DME
Electric fan, function: limited operation
1A4007
DME
Electric fan, function: Operating mode implausible
And:
There is no customer-facing vehicle symptom(s) or related check control message displayed.
CAUSE
A software error may cause these faults to be erroneously stored in the Digital Motor Electronics (DME).
CORRECTION
The faults may only be considered erroneous if described as such in the following procedure.
In all other circumstances and conditions, the faults should be regarded as real faults and diagnosed with
ISTA as needed.
Note: Evaluation of the fault pattern is planned to be incorporated in ISTA. This change is expected
to be implemented in ISTA 4.18.1x (expected availability early July 2019)
PROCEDURE
Read out the environmental conditions and time stamps for 1A4007 and 1A2806.
If both faults were stored simultaneously or 1A4007 was stored up to 15 seconds after fault 1A2806 and the
fault counter for each fault is 1, perform the following:
1. Delete the fault memory
2. Cycle the terminal status (ignition off, wait 30 seconds, ignition on)
3. Activate the electric fan with ISTA for one minute
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TIS Service Bulletin
Page 2 of 2
Path for electric fan activation:
• Control unit functions
• Component activation
• General
• Electric fan activation
4. Cycle the terminal status (ignition off, wait 30 seconds, ignition on)
5. Activate the electric fan a second time for one minute
6. If neither of the faults have returned, they should be regarded as an erroneous fault and should be
ignored
WARRANTY INFORMATION
In conjunction with the ISTA diagnosis of un-related issue(s), covered under the terms of the BMW
New
Vehicle Limited Warranty for Passenger Cars and Light Trucks.
Defect Code:
17 11 11 99 00
Electric fan Fault code stored in diagnosis fault code
memory (no warning lamp)
Labor
Operation:
Labor
Allowance:
Description:
61 00 980
Refer to AIR
Continue the vehicle test and perform a quick delete
2 FRU
Work time for evaluation of the fault codes as outlined in the
procedure
And:
61 00 006
Work time labor operation code 61 00 006 is not considered a Main labor operation. Also, since the work time
FRU allowance to be claimed is specified, a separate punch time is not required. However, it still requires an
explanation on the repair order and in the claim comments section.
Other Repairs
If other eligible and covered work is performed as a result of performing the ISTA diagnostics and related test
plans, claim this work with the applicable defect code and the labor operations (including diagnosis) that are
listed in AIR.
[ Copyright ©2019 BMW of North America, Inc. ]
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TSB/Document ID: B121619
Replacement Service Bulletin Number:
MFR Communication Date: 2019-05-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
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