LI91.25-P-059392
Service Bulletin Details
Public Details for: LI91.25-P-059392
No inflation of one or more air cushions on the massage/multicontour/dynamic seat modules (driver, front passenger and rear) bubble formation in one or more seats with massage/multicontour/dynamic seat modules (driver, front passenger and
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Multicontour/dynamic seat, malfunctions Topic number LI91.25-P-059392 Version 1 Design group 91.25 Multicontour seat (MCS) Date 07-12-2014 Validity Model series W/V 221 with SA code 406 or 409 or 432 as of VIN 221...106647 up to VIN 221...134746 Model series 216 with SA code 409 or 432 as of VIN 216. ..002723 up to VIN 216...006715 Reason for change Update Reason for block Complaint: No inflation of one or more air cushions on the massage/multicontour/dynamic seat modules (driver, front passenger and rear) Bubble formation in one or more seats with massage/multicontour/dynamic seat modules (driver, front passenger and rear) Cause: Due to faulty transistors in the valve electronics, valves (Figure 9) in the cushion/backrest pads can operate by themselves. Depending on the switch position of the valve, this can result in either non-inflation or over-inflation of air cushions without any action by the driver. Attachments File Description Ventile_MKS_FDS_Einlage.JPG (9) Ventile der Multikontur/ Fahrdynamik-Einlagen - Valves of multicontour / dynamic seat pads Remedy: General note prior to commencing the remedial action: The comfort functions control units in the backrest and the pneumatic pump may only be replaced when all the checks described below have been performed without success and the malfunctions continue to exist. The control unit under the seat cushion is not integrated in the comfort system and must not under any circumstances be replaced in connection with these complaints. The malfunctions to which this document refers (within the specified VIN range) are caused by the faulty transistors in the valves and not by the control units or the pneumatic pump. The control unit programming described at the end must be performed in all cases. The fault memory of the vehicle must first be read out via the DAS quick test and analyzed as follows for all seats. For the front multicontour/dynamic seat pads in the backrest (Figures 4 and 7) and cushions (Figures 5 and 8) and for the multicontour pads in the rear (Figure 2): The faulty valves can cause fault codes in the following control units: * Left front dynamic seat (present in 221 and 216) * Right front dynamic seat (present in 221 and 216) * Left rear multicontour backrest (present in 221 only) * Right rear multicontour backrest (present in 221 only) * Dynamic seat pump (present in 221 and 216) 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 1/15 If there are faulty valves in a pad (also referred to as a module carrier), the following fault codes may be stored in the relevant control units (left and right front dynamic seat, left and right rear multicontour backrest): * 9210 "System failure of backrest module carrier" in the case of a defective multicontour/dynamic seat pad (module carrier) in the backrest * 9211 "System failure of cushion module carrier" in the case of a defective multicontour/dynamic seat pad (module carrier) in the cushion If these fault codes are found, the corresponding multicontour/dynamic seat pads (module carriers) in the relevant seats must be replaced. Please note: On the front seats, the pads (module carriers) in the backrest (pictures 4 and 7) and cushion (pictures 5 and 8) for the multicontour/dynamic seat function can be replaced separately. On the rear seat, however, the entire backrest pad (Figure 2) must be replaced because in this case the corresponding modules are permanently integrated. The following fault codes may be stored in the control units even for seats that are not affected: * 9306 "Pump error" * 9307 "Pump inactive". These fault codes are caused by the automatic shutoff of the pneumatic pump. In these cases, therefore, do not replace any components on the associated seats. For the massage pads at the front (only with SA code 432, Figures 3 and 6) and at the rear (only with SA code 406, Figure 2): 1) Faulty valves in the massage pads may cause the fault code 9202 "The module carrier for the massage function is defective" in the following control units: * Left front dynamic seat (present in 221 and 216) * Right front dynamic seat (present in 221 and 216) * Left rear multicontour backrest (present in 221 only) * Right rear multicontour backrest (present in 221 only) If these fault codes are found, the corresponding massage pads in the relevant seats must be replaced. Please note: The massage pad in the front seats is permanently integrated in the backrest pad, so the entire backrest pad must be replaced (cf. picture 1 and 3). As mentioned above, the same applies for the massage pads in the rear seats (cf. picture 2). 2) Furthermore, faulty valves in the massage pads may cause the following fault codes in the dynamic seat pump control unit: * 9251 "Pressure loss detected due to a leak" * 9250 "Pressure buildup not possible due to a leak" If these fault codes occur in one of the dynamic seat/multicontour seat control units in the seats without the above fault code 9202, it is not possible to immediately identify the defective massage pad. In this case, therefore, the test steps described below must be followed until the faulty massage pad is found (it is best to begin with the front seats): 2.1) The fault memory of the pump control unit (dynamic seat pump) must first be erased. 2.2) Each seat with massage function must then be isolated from the pneumatic system. Each seat has a separable connector which must be used for this purpose. On the front seats the separable connectors are accessed by removing the rear seat lining. On the rear seats these connectors are located behind the backrests. The separation point leading to the pump must be sealed with a blind plug (A 124 805 02 44). The system must then be pressurized for at least 5 minutes (during this time do not operate any pneumatic functions otherwise the pump control unit will not register the random air consumption). 2.3) If the seat with faulty massage function is isolated from the system, no fault is stored in the pump because no random air loss is detected. This identifies the faulty massage pad. Then replace the appropriate backrest pad (with integrated massage pads) of the seat identified as faulty. Important additional note: The following fault codes may also be stored in the control unit of the pneumatic pump (dynamic seat pump): * 9180 "Pressure supply shut off via CAN signal from MCMS_FL" * 9181 "Pressure supply shut off via CAN signal from MCMS_FR" * 9182 "Pressure supply shut off via CAN signal from MCMS_RL" * 9183 "Pressure supply shut off via CAN signal from MCMS_RR" 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 2/15 If one or more of these faults is stored in the pump control unit and if the faulty parts cannot be replaced immediately, the entire pneumatic system must be decommissioned by deactivating the pump via DAS (menu item "Commissioning"). Under no circumstances should be fault memory be erased and the system recommissioned without first replacing the faulty parts or deactivating the pump. The same applies in the case of significant overinflation of one or more air cushions (bubble formation). After replacing the faulty module carrier for the massage/multicontour/dynamic seat function, control unit programming must be performed using DAS on the left/right front dynamic seat, left/right rear multicontour backrest and dynamic seat pump control units. Symptoms Body / Seat / Multicontour seat / Nonfunctional Body / Seat / Dynamic multicontour seat / Nonfunctional Control unit/fault code Control unit Fault code Fault text DS-LF-Left front dynamic seat 9210 (FDSVL2) The module carrier for the backrest is defective. (((ECU1_DV_ HEX@0100-))) DS-RF-Right front dynamic se- 9306 at (FDSVR2) Event:Control unit DSP is switched off due to a fault. DS-RF-Right front dynamic se- 9307 at (FDSVR2) Event:Control module DSP is not activated. DS-RF-Right front dynamic se- 9251 at (FDSVR2) Leakage at an air cushion-Left air cushion for lateral support ((ECU_FDSVR2_DEF_FDS und Massage@aktiv,(ECU1_DV_ HEX@0002-ECU1_DV_HEX@0005))) DS-RF-Right front dynamic se- 9251 at (FDSVR2) Leakage at an air cushion-Inflatable cushion for lateral support (((ECU1_DV_HEX@0002-ECU1_DV_HEX@0005),not(ECU_ FDSVR2_DEF_FDS und Massage@aktiv))) DS-RF-Right front dynamic se- 9250 at (FDSVR2) Leakage at an air cushion-Inflatable cushion in shoulder area (((ECU1_DV_HEX@0002-ECU1_DV_HEX@0005))) DS-LF-Left front dynamic seat 9211 (FDSVL2) The module carrier for the seat cushion is defective. (((ECU1_ DV_HEX@0100-))) DS-LF-Left front dynamic seat 9306 (FDSVL2) Event:Control unit DSP is switched off due to a fault. DS-LF-Left front dynamic seat 9307 (FDSVL2) Event:Control module DSP is not activated. DS-LF-Left front dynamic seat 9251 (FDSVL2) Leakage at an air cushion-Left air cushion for lateral support ((ECU_FDSVL2_DEF_FDS und Massage@aktiv,(ECU1_DV_ HEX@0002-ECU1_DV_HEX@0005))) DS-LF-Left front dynamic seat 9251 (FDSVL2) Leakage at an air cushion-Inflatable cushion for lateral support (((ECU1_DV_HEX@0002-ECU1_DV_HEX@0005),not(ECU_ FDSVL2_DEF_FDS und Massage@aktiv))) DS-LF-Left front dynamic seat 9250 (FDSVL2) Leakage at an air cushion-Inflatable cushion in shoulder area (((ECU1_DV_HEX@0002-ECU1_DV_HEX@0005))) DS-RF-Right front dynamic se- 9210 at (FDSVR2) The module carrier for the backrest is defective. (((ECU1_DV_ HEX@0100-))) DS-RF-Right front dynamic se- 9211 at (FDSVR2) The module carrier for the seat cushion is defective. (((ECU1_ DV_HEX@0100-))) 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 3/15 Parts Part number ES1 ES2 Designation Quantity Note EPC Other make part A 216 910 32 16 Right seat pad 1 X A 216 910 34 16 Right seat pad 1 X A 216 910 15 75 Padding in right backrest (SA code 409) 1 X A 216 910 16 75 Padding in right backrest 1 X Right seat padding 1 X A 216 910 31 16 Left seat pad 1 X A 216 910 33 16 Left seat pad 1 X A 216 910 13 75 Left seat padding 1 X A 221 910 07 16 Pad 1 X A 221 910 09 16 Pad 1 X A 221 910 21 75 Multicontour seat padding 1 X Dynamic seat padding 1 X A 221 910 20 75 Right multicontour seat/dynamic seat padding 1 X A 221 910 00 75 Left multicontour seat/dynamic 1 seat padding X A 221 920 22 16 Right pad 1 X A 221 920 20 16 Right pad 1 X Right pad 1 X A 221 920 28 16 Right pad 1 X A 221 920 21 16 Left pad 1 X A 221 920 19 16 Left pad 1 A 221 920 41 16 Left pad 1 X A 221 920 27 16 Left pad 1 X A 124 805 02 44 Blind plug 1 A 216 910 19 16 Left seat pad 1 X A 216 910 20 16 Right seat pad 1 X A 221 910 12 16 Left/right pad 1 X A 221 910 07 16 Left/right pad 1 X A 216 910 14 75 A 221 910 22 75 A 221 920 42 16 27 28 28 Part being added to parts system at time of release of this LI. Part may be required for test procedure X X Attachments File Description Schnittbild_221_Sitz_vorn.jpg (1) 221 Sitz vorn Schnittbild - 221 Front seat cutaway view Schnittbild_221_Sitz_Fond.jpg (2) 221 Sitz Fond Schnittbild - 221 Rear seat cutaway view 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 4/15 Lehnenauflage_Massageeinlage_221.JPG (3) 221 Lehnenauflage mit optionaler Massageeinlage vorn - 221 Backrest padding with optional massage layer, front MKS_FDS_Einlage_Lehne_221.JPG (4) 221 Multikontur-/ Fahrdynamik-Einlage (-Modulträger) Lehne vorn - 221 Backrest multicontour / dynamic seat pad (module carrier), front MKS_FDS-Einlage_Kissen_221.JPG (5) 221 Multikontur-/ Fahrdynamik-Einlage (-Modulträger) Kissen vorn - 221 Seat cushion multicontour / dynamic seat pad (module carrier), front Lehnenauflage_Massageeinlage_216.JPG (6) 216 Lehnenauflage mit optionaler Massageeinlage vorn - 216 Backrest padding with optional massage layer, front MKS_FDS_Einlage_Lehne_216.JPG (7) 216 Multikontur-/ Fahrdynamik-Einlage (-Modulträger) Lehne vorn - 216 Backrest multicontour / dynamic seat pad (module carrier), front MKS_FDS-Einlage_Kissen.JPG (8) 216 Multikontur-/ Fahrdynamik-Einlage (-Modulträger) Kissen vorn - 216 Seat cushion multicontour / dynamic seat pad (module carrier), front Work units Op. no. Operation text 07-12-2014 3:19 AM © Copyright Daimler AG Time PLUBONS Damage code Note 91A0H 52 Model series 221- upper leg area air cushion of left front seat cushion 91A0K 52 Model series 221- multicontour seat center air cushion of left front seat backrest 91A0N 52 Model series 221- side area air cushion of left front seat backrest 91A3A 52 Model series 221- massage cushion of left front seat backrest 91B00 52 Model series 221- left shoulder area air cushion of front seat backrest 91B01 52 Model series 221- left side area air cushion of front seat cushion 91N0H 52 Model series 221- upper leg area air cushion of right front seat cushion 91N0K 52 Model series 221- multicontour seat center air cushion of right front seat backrest 91N0N 52 Model series 221- side area air cushion of right front seat backrest 91N2A 52 Model series 221- massage cushion of right front seat backrest 91P00 52 Model series 221- right shoulder area air cushion of front seat backrest 91P01 52 Model series 221- right side area air cushion of front seat cushion Page 5/15 92B03 52 Model series 221- left shoulder area air cushion of rear seat backrest 92B0B 52 Model series 221- side area air cushion of left rear seat backrest 92B0Z 52 Model series 221- massage cushion of left rear seat backrest 92C0E 52 Model series 221- lumbar support air cushion of left rear seat backrest 92R0E 52 Model series 221- lumbar support air cushion of right rear seat backrest 92P03 52 Model series 221- right shoulder area air cushion of rear seat backrest 92P0B 52 Model series 221- side area air cushion of right rear seat backrest 92P0Z 52 Model series 221- massage cushion of right rear seat backrest 91271 53 Model series 216- motor for front seat massage function 91037 52 Model series 216- lumbar support air cushion of front seat 91087 52 Model series 216- side area air cushion of front seat backrest 91088 52 Model series 216- upper leg area air cushion of front seat cushion 91B00 52 Model series 216- left shoulder area air cushion of front seat backrest 91B01 52 Model series 216- left side area air cushion of front seat cushion 91P00 52 Model series 216- right shoulder area air cushion of front seat backrest 91P01 52 Model series 216- right side area air cushion of front seat cushion Validity Vehicle Engine Transmission 216.371 * * 216.376 * * 216.377 * * 216.379 * * 216.386 * * 221.022 * * 221.028 * * 221.054 * * 221.056 * * 221.070 * * 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 6/15 221.077 * * 221.080 * * 221.084 * * 221.086 * * 221.122 * * 221.128 * * 221.154 * * 221.156 * * 221.170 * * 221.171 * * 221.176 * * 221.177 * * 221.179 * * 221.180 * * 221.184 * * 221.186 * * Vehicle Engine Transmission 216.371 273.961 722.770 216.371 273.961 722.904 216.376 275.953 722.649 216.377 156.984 722.907 216.377 156.984 722.930 216.379 275.982 722.649 216.386 273.968 722.904 216.386 273.968 722.961 221.022 642.930 722.902 221.028 629.911 722.903 221.054 272.946 722.999 221.056 272.965 722.906 221.070 273.922 722.904 221.077 156.984 722.907 221.077 156.984 722.930 221.080 642.932 722.962 221.084 273.924 722.961 221.086 273.968 722.961 221.122 642.930 722.902 221.128 629.911 722.903 221.154 272.946 722.999 221.156 272.965 722.906 221.170 273.922 722.904 Full model designation breakdown 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 7/15 221.171 273.961 722.904 221.176 275.953 722.649 221.177 156.984 722.907 221.177 156.984 722.930 221.179 275.982 722.649 221.180 642.932 722.962 221.184 273.924 722.961 221.186 273.968 722.961 Attachments 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 8/15 Schnittbild_221_Sitz_ vorn.jpg: 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 9/15 Schnittbild_221_Sitz_ Fond.jpg: 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 10/15 Lehnenauflage_Massageeinlage_221.JPG: 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 11/15 MKS_FDS_Einlage_Lehne_221.JPG: MKS_FDS-Einlage_Kissen_221.JPG: 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 12/15 Lehnenauflage_Massageeinlage_216.JPG: 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 13/15 MKS_FDS_Einlage_Lehne_216.JPG: MKS_FDS-Einlage_Kissen.JPG: 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 14/15 Ventile_MKS_FDS_Einlage.JPG: 07-12-2014 3:19 AM © Copyright Daimler AG PLUBONS Page 15/15