2010-2020 BMW 328i Technical Service Bulletin # 320109 Date: 110202
2010-2020 BMW 328i Technical Service Bulletin # 320109 Date: 110202
Interior - Heated Steering Wheel Malfunctions
SI B32 01 09
Steering and Wheel Alignment
February 2011
Technical Service
This Service Information bulletin supersedes SI B32 01 09 dated February 2011.
[NEW] designates changes to this revision
SUBJECT
Heated Steering Wheel Malfunction
MODEL
E90, E91, E92, E93 (3 Series) produced from 9/2008 and equipped with the Heated Steering Wheel (SA 248)
E82, E88 (1 Series) produced from 9/2008 and equipped with the Heated Steering Wheel (SA 248)
SITUATION
Immediately following a cold start, if the heated steering wheel is switched on in addition to other electrical consumers (i.e., heated seats, rear
defroster, etc.), it may switch off after 5-10 seconds of operation. This is an intermittent situation. Cycling the key will typically restore function.
CAUSE
For the first few seconds after start-up, voltage levels may dip momentarily when electrical consumers are switched on. If the supply voltage dips
below the threshold for the heated steering wheel, it will be switched off.
This situation may be present even if the battery is properly charged and no charging system problems are present.
CORRECTION
Refer to ISTA diagnosis for the required repair procedure.
PROCEDURE
The problem has been integrated into ISTA diagnostics. Follow the diagnosis test plan, using the latest ISTA version.
In "Information Search", select the "Function Structure" tab. Select "Body", "Heating and air conditioning functions", "Current fault patterns
"Steering wheel heating fault patterns" and then press "Start Search".
A. [NEW] FOR VEHICLES PRODUCED FROM SEPTEMBER 1, 2008 THROUGH MAY 20, 2009, SELECT TEST PLAN "W3233_WAS1
MALFUNCTION OF STEERING WHEEL HEATER".
B. [NEW] FOR VEHICLES PRODUCED AFTER APRIL 1, 2010, SELECT TEST PLAN "W3233_WAS2 MALFUNCTION OF STEERING
WHEEL HEATER".
[NEW] Vehicles produced between May 21, 2009 and March 31, 2010 have no known problem.
WARRANTY INFORMATION
2010-2020 BMW 328i Sedan (E90) L6-3.0L (N52K) Page 193
Refer to the KSD2 to code the repair performed as prescribed by ISTA diagnosis results and the Warranty Policy and Procedures Manual for
specific warranty coverage.
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