LI91.10-P-049799

Quiescent current in seat control unit
Topic number
LI91.10-P-049799
Version
2
Design group
91.10 Front seats
Date
07-10-2014
Validity
Model series 203, 209, 210, 211
Reason for change
WIS reference added
Reason for block
Complaint:
Quiescent current in seat control unit.
Cause:
The presence of a quiescent current can have several causes.
These are not always recognized and lead to an increased number of OK components being removed.
Possible Hall sensor faults or normalization faults can exist which can be eliminated without replacing the control unit.
Remedy:
Work through the following test procedure:
1. Power consumption:
Power consumption must be tested using a multimeter.
Quiescent current (CAN not active, the following voltages must be measured (10 V UBatt 15 V):
No-load current (CAN not active, backrest not folded, no seat adjustment): 300 µA
No-load current (CAN not active, backrest folded, no seat adjustment): 20 mA
Operating current (CAN active, no seat adjustment): 200 mA
Should the currents be outside the values described above, the following connectors should be removed in sequence.
Connector 11 (violet): Dynamic seat (FDS) if installed
Connector 8 (transparent): Height release switch (HES)
Connector 7 (pink): Backrest release switch (LES)
Connector 6 (orange): Backrest/head restraint motor (L/K)
Connector 5 (brown): Inclination adjustment (height at front) (HV)
Connector 4 (black): Fore/aft adjustment (LV)
Connector 3 (green): Height adjustment (height at rear) (HH)
Connector 1 (black): CAN and steering column (CAN, LS)
If after disconnecting all the above listed connectors the current is outside the defined values, the seat control unit
must be replaced.
2. Normalization faults
If a normalization fault is stored without the corresponding Hall sensor fault, an adjustment for this adjustment shaft
must be performed in both directions. This ensures that after an inadvertent erasure of the Hall sensor fault this is set
again.
If the Hall sensor fault is not stored following adjustment in both directions, it is sufficient to carry out a new normalization.
If a Hall sensor fault is stored, see chapter "Hall sensor faults“.
3. Hall sensor faults
If Hall sensor faults are stored, the current status of the seat control unit is recorded first. The following information is
read out for this purpose:
Normalizing position of all shafts (except steering column, is not normalized)
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Actual position of all shafts
fault
Read the switch status for the release switch (note: seat adjustment is not possible if the backrest has been released)
The following test must be carried for all shafts with Hall sensor faults:
Read status (see "Read status“)
Erase fault
Move adjustment shaft for > 2 sec
Read status (see "Read status“)
Move adjustment shaft for > 2 sec in opposite direction
Read status (see "Read status“)
If Hall sensor faults are present after the test sequence, for these adjustment shafts the contacting must be checked
for loose contact and the lines for short circuits.
Hall sensor signal line: check for short circuit to UBatt and ground
Hall sensor ground line: check for short circuit to UBatt
Motor lines: check for short circuit to UBatt
All resistance measurements must be > 1 Mohm
If the wiring harnesses and connections were found to be OK, the seat control unit must be replaced.
Symptoms
Body / Seat / Seat adjustment / Function error
Overall vehicle / Power supply / Battery/On-board electrical system / Battery function / Battery discharges
Control unit/fault code
Control unit
Fault code
ESA passenger-Electric seat adjustment front passenger
(with memory) (ESVB1) (CLK
(209),C (203),E (211))
Fault text
-
Parts
Part number
ES1 ES2 Designation
Quantity Note
EPC Other
make
part
A2118704626
Control unit
1
Left seat control unit
X
A2118704726
Control unit
1
Right seat control unit
X
Work units
Op. no.
Operation text
Time
Damage
code
Note
82475 54
Seat adjustment control unit
WIS-References
Document number
Title
ar54.10-p-1030-03p
Check no-load current
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© Copyright Daimler AG
Note
Allocation
Remedy
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Validity
Vehicle
Engine
Transmission
203.004
*
*
203.006
*
*
203.007
*
*
203.008
*
*
203.016
*
*
203.018
*
*
203.020
*
*
203.035
*
*
203.040
*
*
203.042
*
*
203.043
*
*
203.045
*
*
203.046
*
*
203.052
*
*
203.054
*
*
203.056
*
*
203.061
*
*
203.064
*
*
203.065
*
*
203.076
*
*
203.081
*
*
203.084
*
*
203.087
*
*
203.092
*
*
203.204
*
*
203.206
*
*
203.207
*
*
203.208
*
*
203.216
*
*
203.218
*
*
203.220
*
*
203.235
*
*
203.240
*
*
203.242
*
*
203.243
*
*
203.245
*
*
203.246
*
*
203.252
*
*
203.254
*
*
203.256
*
*
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203.261
*
*
203.264
*
*
203.265
*
*
203.276
*
*
203.281
*
*
203.284
*
*
203.287
*
*
203.292
*
*
203.706
*
*
203.707
*
*
203.708
*
*
203.718
*
*
203.735
*
*
203.740
*
*
203.741
*
*
203.742
*
*
203.743
*
*
203.745
*
*
203.746
*
*
203.747
*
*
203.752
*
*
203.756
*
*
203.764
*
*
CLK (209)
*
*
E (210)
*
*
E (211)
*
*
Vehicle
Engine
Transmission
203.004
611.962
716.601
203.004
611.962
716.603
203.004
611.962
716.604
203.004
611.962
722.619
203.004
611.962
722.699
203.006
611.962
716.640
203.006
611.962
716.647
203.006
611.962
716.651
203.006
611.962
722.699
203.007
646.962
716.604
203.007
646.962
716.606
203.007
646.962
722.699
203.007
646.963
716.604
Full model designation breakdown
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203.007
646.963
716.606
203.007
646.963
722.699
203.008
646.963
716.649
203.008
646.963
716.654
203.008
646.963
722.699
203.016
612.962
716.641
203.016
612.962
716.648
203.016
612.962
716.649
203.016
612.962
716.654
203.016
612.962
722.634
203.016
612.962
722.640
203.018
612.990
722.642
203.020
642.910
716.653
203.020
642.910
722.902
203.035
111.951
716.620
203.035
111.951
716.633
203.035
111.951
722.602
203.035
111.951
722.615
203.040
271.948
716.628
203.040
271.948
716.631
203.040
271.948
722.695
203.042
271.940
716.605
203.042
271.940
716.628
203.042
271.940
716.631
203.042
271.940
722.695
203.043
271.942
716.628
203.043
271.942
716.631
203.043
271.942
722.695
203.045
111.955
716.622
203.045
111.955
716.630
203.045
111.955
722.616
203.046
271.946
716.605
203.046
271.946
716.628
203.046
271.946
716.631
203.046
271.946
722.695
203.052
272.920
716.638
203.052
272.920
722.998
203.054
272.940
716.669
203.054
272.940
722.999
203.056
272.960
716.664
203.056
272.960
722.906
203.061
112.912
716.623
203.061
112.912
716.634
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203.061
112.912
716.638
203.061
112.912
722.696
203.064
112.946
716.667
203.064
112.946
716.669
203.064
112.946
722.618
203.065
112.961
722.633
203.065
112.961
722.641
203.076
113.988
722.636
203.081
112.916
722.667
203.084
112.953
722.668
203.087
272.970
722.676
203.092
272.941
722.690
203.204
611.962
716.601
203.204
611.962
716.603
203.204
611.962
716.604
203.204
611.962
722.619
203.204
611.962
722.699
203.206
611.962
716.640
203.206
611.962
716.647
203.206
611.962
716.651
203.206
611.962
722.699
203.207
646.962
716.604
203.207
646.962
716.606
203.207
646.962
722.699
203.207
646.963
716.604
203.207
646.963
716.606
203.207
646.963
722.699
203.208
646.963
716.649
203.208
646.963
716.654
203.208
646.963
722.699
203.216
612.962
716.641
203.216
612.962
716.648
203.216
612.962
716.649
203.216
612.962
716.654
203.216
612.962
722.634
203.216
612.962
722.640
203.218
612.990
722.642
203.220
642.910
716.653
203.220
642.910
722.902
203.235
111.951
716.620
203.235
111.951
716.633
203.235
111.951
722.602
203.235
111.951
722.615
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203.240
271.948
716.628
203.240
271.948
716.631
203.240
271.948
722.695
203.242
271.940
716.605
203.242
271.940
716.628
203.242
271.940
716.631
203.242
271.940
722.695
203.243
271.942
716.628
203.243
271.942
716.631
203.243
271.942
722.695
203.245
111.955
716.620
203.245
111.955
716.622
203.245
111.955
716.627
203.245
111.955
716.630
203.245
111.955
722.602
203.245
111.955
722.616
203.246
271.946
716.605
203.246
271.946
716.628
203.246
271.946
716.631
203.246
271.946
722.695
203.252
272.920
716.638
203.252
272.920
722.998
203.254
272.940
716.669
203.254
272.940
722.999
203.256
272.960
716.664
203.256
272.960
722.906
203.261
112.912
716.623
203.261
112.912
716.634
203.261
112.912
722.696
203.261
112.912
722.698
203.264
112.946
722.618
203.264
112.946
722.633
203.265
112.961
722.633
203.265
112.961
722.641
203.276
113.988
722.636
203.281
112.916
722.667
203.284
112.953
722.668
203.287
272.970
722.676
203.292
272.941
722.690
203.706
611.962
716.640
203.706
611.962
716.647
203.706
611.962
716.651
203.706
611.962
722.699
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203.707
646.962
711.655
203.707
646.962
716.604
203.707
646.962
716.606
203.707
646.962
722.699
203.707
646.963
711.655
203.707
646.963
716.604
203.707
646.963
716.606
203.707
646.963
722.699
203.708
646.963
711.653
203.708
646.963
716.649
203.708
646.963
716.654
203.708
646.963
722.699
203.718
612.990
722.642
203.735
111.951
716.620
203.735
111.951
716.633
203.735
111.951
722.602
203.735
111.951
722.615
203.740
271.948
716.605
203.740
271.948
716.628
203.740
271.948
716.631
203.740
271.948
722.695
203.741
271.957
711.656
203.741
271.957
716.605
203.741
271.957
716.631
203.741
271.957
722.695
203.742
271.940
716.605
203.742
271.940
716.628
203.742
271.940
716.631
203.742
271.940
722.695
203.743
271.942
716.628
203.743
271.942
722.695
203.745
111.955
716.622
203.745
111.955
716.627
203.745
111.955
716.630
203.745
111.955
722.616
203.746
271.946
711.656
203.746
271.946
716.605
203.746
271.946
716.628
203.746
271.946
716.631
203.746
271.946
722.695
203.747
111.981
716.632
203.747
111.981
716.662
203.747
111.981
716.663
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203.747
111.981
716.668
203.747
111.981
722.616
203.752
272.920
711.656
203.752
272.920
716.638
203.752
272.920
722.998
203.756
272.960
711.654
203.756
272.960
716.664
203.756
272.960
722.906
203.764
112.946
716.667
203.764
112.946
716.669
203.764
112.946
722.618
209.308
646.966
716.654
209.308
646.966
722.699
209.316
612.962
716.649
209.316
612.962
716.654
209.316
612.962
722.634
209.316
612.962
722.640
209.316
612.967
716.649
209.316
612.967
716.654
209.316
612.967
722.634
209.316
612.967
722.640
209.320
642.910
716.653
209.320
642.910
722.902
209.341
271.955
716.631
209.341
271.955
722.695
209.342
113.994
716.628
209.342
113.994
716.631
209.342
113.994
722.649
209.342
113.994
722.695
209.342
271.940
716.628
209.342
271.940
716.631
209.342
271.940
722.649
209.342
271.940
722.695
209.343
271.942
716.424
209.343
271.942
716.628
209.343
271.942
722.695
209.354
272.940
716.669
209.354
272.940
722.999
209.356
272.960
716.664
209.356
272.960
722.906
209.361
112.912
716.623
209.361
112.912
716.634
209.361
112.912
716.638
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209.361
112.912
722.696
209.365
112.955
722.618
209.372
273.967
722.904
209.375
113.968
722.633
209.375
113.968
722.901
209.376
113.987
722.636
209.376
113.987
722.907
209.376
113.988
722.636
209.376
113.988
722.907
209.377
156.982
722.907
209.420
642.910
716.653
209.420
642.910
722.902
209.441
271.955
716.631
209.441
271.955
722.695
209.442
113.994
716.424
209.442
113.994
716.628
209.442
113.994
716.631
209.442
113.994
722.649
209.442
113.994
722.695
209.442
271.940
716.424
209.442
271.940
716.628
209.442
271.940
716.631
209.442
271.940
722.649
209.442
271.940
722.695
209.454
272.940
716.669
209.454
272.940
722.999
209.456
272.960
716.664
209.456
272.960
722.906
209.461
112.912
716.424
209.461
112.912
716.623
209.461
112.912
716.634
209.461
112.912
716.638
209.461
112.912
722.696
209.465
112.955
722.618
209.472
273.967
722.904
209.475
113.968
722.633
209.475
113.968
722.901
209.476
113.987
722.636
209.476
113.987
722.907
209.476
113.988
722.636
209.476
113.988
722.907
209.477
156.982
722.907
210.003
604.917
717.416
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210.003
604.917
717.418
210.003
604.917
722.602
210.003
604.917
722.603
210.004
604.912
717.416
210.004
604.912
717.418
210.004
604.912
722.441
210.004
604.912
722.602
210.004
604.912
722.603
210.006
611.961
716.640
210.006
611.961
716.647
210.006
611.961
716.649
210.006
611.961
716.651
210.006
611.961
717.466
210.006
611.961
722.614
210.006
611.961
722.699
210.007
611.961
716.601
210.007
611.961
716.603
210.007
611.961
716.604
210.007
611.961
717.466
210.007
611.961
722.614
210.007
611.961
722.699
210.010
605.912
717.417
210.010
605.912
722.442
210.010
605.912
722.601
210.010
605.912
722.602
210.015
605.962
717.460
210.015
605.962
717.466
210.016
612.961
716.641
210.016
612.961
716.648
210.016
612.961
716.649
210.016
612.961
722.608
210.016
612.961
722.634
210.017
602.982
717.460
210.017
602.982
717.466
210.017
602.982
722.605
210.017
602.982
722.613
210.020
606.912
717.446
210.020
606.912
722.438
210.020
606.912
722.600
210.025
606.962
722.608
210.026
613.961
722.626
210.035
111.942
716.620
210.035
111.942
717.417
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210.035
111.942
717.418
210.035
111.942
722.443
210.035
111.942
722.602
210.035
111.942
722.615
210.037
111.970
717.417
210.037
111.970
722.440
210.037
111.970
722.600
210.045
111.947
716.622
210.045
111.947
717.460
210.045
111.947
722.605
210.045
111.947
722.616
210.045
111.974
716.622
210.045
111.974
717.460
210.045
111.974
722.605
210.045
111.974
722.616
210.048
111.957
716.622
210.048
111.957
716.630
210.048
111.957
722.616
210.053
104.945
717.441
210.053
104.945
717.460
210.053
104.945
722.424
210.053
104.945
722.510
210.053
104.945
722.604
210.055
104.990
722.328
210.055
104.990
722.329
210.055
104.990
722.509
210.055
104.990
722.605
210.055
104.990
722.629
210.055
104.995
722.328
210.055
104.995
722.329
210.055
104.995
722.509
210.055
104.995
722.605
210.055
104.995
722.629
210.061
112.911
716.621
210.061
112.911
717.463
210.061
112.911
722.609
210.061
112.911
722.698
210.062
112.914
716.623
210.062
112.914
716.634
210.062
112.914
722.696
210.062
112.914
722.698
210.063
112.921
716.623
210.063
112.921
716.634
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210.063
112.921
717.462
210.063
112.921
722.606
210.063
112.921
722.617
210.065
112.941
722.607
210.065
112.941
722.618
210.070
113.940
722.623
210.070
113.940
722.632
210.072
119.980
722.625
210.072
119.980
722.627
210.072
119.985
722.625
210.072
119.985
722.627
210.074
113.980
722.624
210.074
113.980
722.636
210.081
112.921
722.665
210.082
112.941
722.664
210.082
112.941
722.665
210.083
113.940
722.669
210.083
113.940
722.670
210.206
611.961
716.640
210.206
611.961
716.647
210.206
611.961
716.651
210.206
611.961
717.466
210.206
611.961
722.614
210.206
611.961
722.699
210.210
605.912
717.417
210.210
605.912
722.601
210.215
605.962
717.460
210.215
605.962
717.466
210.216
612.961
716.641
210.216
612.961
716.648
210.216
612.961
716.649
210.216
612.961
722.608
210.216
612.961
722.634
210.217
602.982
717.460
210.217
602.982
717.466
210.217
602.982
722.605
210.217
602.982
722.613
210.225
606.962
722.608
210.226
613.961
722.626
210.235
111.942
716.620
210.235
111.942
717.417
210.235
111.942
717.418
210.235
111.942
722.602
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210.235
111.942
722.615
210.237
111.970
717.417
210.237
111.970
722.600
210.245
111.947
716.622
210.245
111.947
717.460
210.245
111.947
722.605
210.245
111.947
722.616
210.248
111.957
716.622
210.248
111.957
716.630
210.248
111.957
722.616
210.261
112.911
716.621
210.261
112.911
717.463
210.261
112.911
722.609
210.261
112.911
722.698
210.262
112.914
716.623
210.262
112.914
716.634
210.262
112.914
722.696
210.262
112.914
722.698
210.263
112.921
716.623
210.263
112.921
716.634
210.263
112.921
722.617
210.265
112.941
722.607
210.265
112.941
722.618
210.270
113.940
722.623
210.270
113.940
722.632
210.272
119.985
722.622
210.272
119.985
722.625
210.274
113.980
722.624
210.274
113.980
722.636
210.281
112.921
722.665
210.282
112.941
722.664
210.282
112.941
722.665
210.283
113.940
722.669
210.283
113.940
722.670
210.283
113.980
722.669
210.283
113.980
722.670
210.606
605.912
717.466
210.606
605.912
722.614
210.606
605.912
722.699
210.606
611.961
717.466
210.606
611.961
722.614
210.606
611.961
722.699
210.610
605.912
717.417
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210.610
605.912
722.601
210.610
605.912
722.605
210.616
612.961
722.634
210.617
602.982
717.460
210.617
602.982
717.466
210.617
602.982
722.605
210.617
602.982
722.613
210.663
112.921
716.623
210.663
112.921
717.462
210.663
112.921
722.606
210.663
112.921
722.617
211.004
646.951
716.604
211.004
646.951
716.606
211.004
646.951
722.699
211.006
646.961
716.649
211.006
646.961
722.699
211.007
646.820
716.654
211.007
646.820
722.699
211.007
646.821
716.654
211.007
646.821
722.699
211.008
646.821
716.654
211.008
646.821
722.640
211.016
647.961
716.649
211.016
647.961
716.654
211.016
647.961
722.640
211.020
642.920
716.646
211.020
642.920
716.653
211.020
642.920
722.902
211.022
642.920
722.902
211.023
648.961
722.640
211.024
642.920
722.902
211.026
648.961
722.626
211.028
628.961
722.639
211.029
629.910
722.903
211.041
271.956
716.628
211.041
271.956
716.631
211.041
271.956
722.695
211.042
271.941
716.628
211.042
271.941
716.631
211.042
271.941
722.695
211.052
272.922
716.634
211.052
272.922
716.638
211.052
272.922
722.998
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211.054
272.943
716.667
211.054
272.943
716.669
211.054
272.943
722.999
211.056
272.964
716.665
211.056
272.964
716.666
211.056
272.964
722.906
211.057
272.985
716.665
211.057
272.985
716.666
211.057
272.985
722.906
211.061
112.913
716.623
211.061
112.913
716.634
211.061
112.913
722.696
211.065
112.949
722.618
211.070
113.967
722.633
211.070
113.967
722.901
211.072
273.960
722.904
211.076
113.990
722.643
211.077
156.983
722.907
211.080
112.917
722.667
211.082
112.954
722.668
211.083
113.969
722.672
211.084
642.921
722.689
211.087
272.972
716.665
211.087
272.972
716.666
211.087
272.972
722.676
211.089
642.921
722.689
211.090
273.962
722.677
211.092
272.944
716.665
211.092
272.944
716.666
211.092
272.944
722.690
211.206
646.961
716.649
211.206
646.961
722.699
211.207
646.821
716.654
211.207
646.821
722.640
211.207
646.821
722.699
211.208
646.821
716.654
211.208
646.821
722.640
211.216
647.961
716.649
211.216
647.961
716.654
211.216
647.961
722.640
211.220
642.920
716.646
211.220
642.920
716.653
211.220
642.920
722.902
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211.222
642.920
722.902
211.223
648.961
722.640
211.226
648.961
722.626
211.241
271.956
716.628
211.241
271.956
716.631
211.241
271.956
722.695
211.242
271.941
716.628
211.242
271.941
716.631
211.242
271.941
722.695
211.252
272.922
716.634
211.252
272.922
722.998
211.254
272.943
716.667
211.254
272.943
716.669
211.254
272.943
722.999
211.256
272.964
716.665
211.256
272.964
716.666
211.256
272.964
722.906
211.257
272.985
716.665
211.257
272.985
716.666
211.257
272.985
722.906
211.261
112.913
716.623
211.261
112.913
716.634
211.261
112.913
722.696
211.265
112.949
722.618
211.270
113.967
722.633
211.270
113.967
722.901
211.272
273.960
722.904
211.276
113.990
722.643
211.277
156.983
722.907
211.280
112.917
722.667
211.282
112.954
722.668
211.283
113.969
722.672
211.284
642.921
722.689
211.287
272.972
716.665
211.287
272.972
716.666
211.287
272.972
722.676
211.289
642.921
722.689
211.290
273.962
722.677
211.292
272.944
716.665
211.292
272.944
716.666
211.292
272.944
722.690
211.606
646.961
722.699
211.608
646.821
722.640
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211.616
647.961
722.640
211.620
642.920
722.902
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