LI32 34-P-056198

Fault message "AIRMATIC" or "Active Curve System" in instrument cluster
Topic number
LI32.34-P-056198
Version
6
Function group
32.34 Anti roll governor (WR)
Date
10-18-2017
Validity
MODEL 166 with CODE 468 (Active Curve System)
MODEL 292 with CODE 468 (Active Curve System)
Reason for change
CP updated.
Reason for block
Complaint:
1. Fault code P1C9B00 (The control unit 'Roll control' has a malfunction). Vehicles up to VIN 166 ### #A 097760 without code 803.
2. Fault code P1C9564 (The rotation direction valve of the torsion bar ''Front axle'' has a malfunction)
3. Fault code P1C9C00 (The oil pressure at the front axle is too low)
Fault code P1C9E00 (The oil pressure at the rear axle is too low)
Cause:
Re. 1. Monitoring of pressures in ACS is too sensitive.
Re. 2. Mechanical fault of rotation direction valve in valve block at front axle.
Re. 3. Oil level too low, air in system.
Remedy:
Re. 1. Perform XENTRY update: Flash software A166 902 5904 in ACS control unit.
Re. 2. Check production date of valve block at front axle.
Production date prior to 24.06.2017 - Replace valve block, see picture 1.
Production date as of 24.06.2017 - Please create a PTSS case.
Re. 3. Bleed hydraulic system with XENTRY (to be found in the roll control unit under the heading "Actuations").
These instructions must be strictly observed:
- Check hydraulic fluid fill level and correct if necessary
- If foam forms in the reservoir during the bleeding process (picture 2), the bleeding routine must be interrupted
until the foam has dissipated.
When only air bubbles can be seen in the oil (picture 3), the bleeding routine can be continued.
10-18-2017 3:08 PM
© Copyright Daimler AG
EDWMARK
Page 1/4
Note: Excessive foaming can cause the system to draw in air bubbles.
Attachments
File
Description
foam.JPG
Picture 2.
bubbles.jpg
Picture 3.
production date valveblock.jpg
Picture 1.
Symptoms
Chassis/suspension / Suspension/Dampening / Suspension System Function / Indicator lamp is on
Chassis/suspension / Suspension/Dampening / AIRMATIC / Display message / Air Suspension - Service Required
Chassis/suspension / Suspension/Dampening / AIRMATIC / Indicator lamp / lit
Chassis/suspension / Suspension/Dampening / Roll control / Nonfunctional
Chassis/suspension / Suspension/Dampening / Roll control / Regulates without obvious cause
Control unit/fault code
Control unit
Fault code
Fault text
N51/6 - Roll control (ARS166) P1C9E00
The oil pressure at the rear axle is too low. _
N51/6 - Roll control (ARS166) P1C9564
The rotation direction valve of torsion bar "Front axle" has a malfunction. There is an implausible signal.
N51/6 - Roll control (ARS166) P1C9C00
The oil pressure at the front axle is too low. _
N51/3 - AIRMATIC (SPC166)
(GL/GLS (166),M/GLE (166))
Control unit "Roll control" has a malfunction. _
P1C9B00
Parts
Part number
ES1 ES2 Designation
Quantity Note
EPC
A 001 989 24 03
Multigrade oil
1
As required
X
A 166 320 11 58
Front valve unit
1
As required and after production date
31.03.2017
X
Operation numbers/damage codes
Op. no.
Operation text
32-6983
CHECK OIL LEVEL OF ACTIVE ROLL
STABILIZATION, CORRECT (AFTER
CHECK)
32707 S1
54-0991
CONTROL UNIT ..... INSTALL SOFTWARE
32651 90
32-7006
REMOVE/INSTALL FRONT AXLE VALVE UNIT OF ACTIVE ROLL STABILIZATION
3270B H2
10-18-2017 3:08 PM
© Copyright Daimler AG
Time
EDWMARK
Damage
code
Note
As required
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WIS-References
Document number
Title
Note
Allocation
ar32.34-p-0021gq
Fill and bleed Active Roll
Stabilization
Remedy
ar32.34-P5030GQX
Remove/install Active Roll
Stabilization valve support
Remedy
Attachments
foam.JPG:
10-18-2017 3:08 PM
© Copyright Daimler AG
EDWMARK
Page 3/4
bubbles.jpg:
production date valveblock.jpg:
10-18-2017 3:08 PM
© Copyright Daimler AG
EDWMARK
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