NHTSA ID Number: 10135948
Manufacturer Communication Number: LI72.20-P-055301
TSB/Document Date: 2018-05-07
Summary
Automatic liftgate occasionally fails to open
Automatic liftgate occasionally fails to open
Topic number
LI72.20-P-055301
Version
2
Design group
72.20 Rear door, tailgate
Date
03-26-2013
Validity
MODEL 166
Reason for change
Complaint and Remedy revised
Reason for block
Complaint:
- When the liftgate is closed, with the liftgate lock in the unlocked condition, the liftgate occasionally fails to open
automatically.
- The opening sequence of the liftgate control is sometimes aborted.
Cause:
Implausible position sensor signal
Remedy:
Remove pins from Hall sensor for drive unit on liftgate control (HKS) on plug connector 2 of control unit for liftgate
control as follows:
1. Remove liftgate control unit (HKS) as per WIS documentation (see WIS references).
=> In model series X166 the trunk covering must not be removed!
2. Detach plug connector 2 (blue connector) from liftgate control (HKS) control unit (picture 1).
3. Remove Pin 1 (GY), Pin 2 (YE) and Pin 5 (BN) on plug connector 2 (picture 2).
4. Insulate individual pins using insulation tape (picture 3).
5. Secure removed lines on wiring harness (picture 4).
6. Connect plug connector 2 (blue plug connector) to liftgate control (HKS) control unit (picture 5).
7. Install liftgate control (HKS) control unit as per WIS documentation (see WIS references).
NOTE:
If the liftgate control (HKS) fails to function after removing the pins, perform initial startup and deletion of the fault
03-26-2013 5:29 PM
© Copyright Daimler AG
BRABENS
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memory for the liftgate control (HKS) control unit.
Attachments
File
Designation
Bild 1.JPG
Figure 1
Bild 2.JPG
Figure 2
Bild 3.JPG
Figure 3
Bild 4.JPG
Figure 4
Bild 5.JPG
Figure 5
Symptoms
Body / Door/Flap / Hood/flap / Trunk lid/liftgate / Does not open
Body / Door/Flap / Hood/flap / Trunk lid/liftgate / Does not close
Control unit/fault code
Control unit
Fault code
Fault text
HKS - Tailgate control (N121/
1) (PTCM166)
B188229
Position sensor 'Trunk lid/tailgate' has a malfunction. There is an
invalid signal.
WIS-References
Document number
Title
AR72.20-P-7551GQ
Remove/install rear-end
door closing control unit
Note
Allocation
Remedy
Validity
Vehicle
Engine
M (166)
*
*
Vehicle
Engine
166.003
651.960
722.908
166.004
651.960
722.908
166.023
642.826
722.903
166.023
642.826
725.031
166.024
642.826
722.903
166.024
642.826
725.031
166.055
276.955
722.906
166.057
276.955
722.906
166.058
276.955
722.906
166.073
278.928
722.909
Full model designation breakdown
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© Copyright Daimler AG
BRABENS
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166.073
278.928
725.031
166.073
278.928
725.032
166.074
157.982
722.905
166.074
157.982
722.931
Attachments
Bild 1.JPG:
03-26-2013 5:29 PM
© Copyright Daimler AG
BRABENS
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Bild 2.JPG:
Bild 3.JPG:
03-26-2013 5:29 PM
© Copyright Daimler AG
BRABENS
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Bild 4.JPG:
Bild 5.JPG:
03-26-2013 5:29 PM
© Copyright Daimler AG
BRABENS
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TSB/Document ID: LI72.20-P-055301
Replacement Service Bulletin Number:
MFR Communication Date: 2013-03-26
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: STRUCTURE:BODY:HATCHBACK/LIFTGATE
MFR Component System:
MFR Component Subsystem:
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