Technical product information Transaction No.: 2013530/7
Running gear: electric parking brake: warning light comes on after engine start Release date: 20-Jan-2011
Customer statement / workshop findings
After the engine start the yellow warning light for the electric parking brake K214 comes on.
The red warning light for the brake system K118 is also permanently on.
When pressing the button for the electro-mechanical parking brake (EPB) the yellow warning light K213 flashes.
The following entries are logged:
00446 002 - restricted function through low voltage, under lower limit
00532 002 - supply voltage under lower limit
02428 002 - left parking brake motor, tensioning force not reached-V282 under lower limit
02429 002 - right parking brake motor, tensioning force not reached-V283 under lower limit
02433 011 - left parking brake motor power supply-V282 disruption
02433 012 - left power supply-V282 electric complaint in the circuit
The EPB control units Part No.: 3C0 907 801 B and E are affected.
Technical background
Control unit responds too sensitively to low voltage complaints.
The EPB control units with part number 3C0 907 801 B and E are affected.
Production change
Electric parking brake generation 3
• From week 22/2007.
Measure
Update the software of the parking brake control unit
Update the software of the parking brake control unit J-540 according to the following table:
Old part number
Software version
New part number
Software version
Software CD
Online from week*
- parking brake control unit J 540
3C0 907 801 B
0001
3C0 907 801 G
0005
from 30
50/06
3C0 907 801 E
0003
3C0 907 801 G
0005
from 30
50/06
Note:
Observe the following points.
• Connect a battery charger to the vehicle battery.
• Release the parking brake
The following points must be observed during and after the programming.
• The parking brake is updated in three stages (see table below)
• During the first stage in 2% of cases the update fails. Deal with it in the guided fault finding. Do not replace the control unit.
• If the test programme ends prematurely, restart it.
• After the successful programming the following sender must be adjusted in the specified sequence.
- Basic settings of longitudinal acceleration sender G251.
- Basic settings of brake system.
- Code control unit J-540 with AUTO-HOLD function
3C0 907 801 B
3C0 907 801 E
→
3C0 907 801 BZ
3C0 907 801 EZ
→
3C0 907 801 GX
→
3C0 907 801 G
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