LI09.20-P-061233

Engine diagnosis warning lamp lights up, engine shakes at idle
Topic number
LI09.20-P-061233
Version
1
Design group
09.20 Intake manifold, intake manifold preheater
Date
04-07-2015
Validity
M156
Reason for change
Reason for block
Complaint:
Engine diagnosis warning lamp lights up, engine shakes at idle
Note:
Fault codes possibly stored:
FC 3698 (Fuel pressure regulation - The lower limit has been reached, the rail pressure sensor has malfunctions)
FC 3699 (Fuel pressure regulation - The upper limit has been reached, the rail pressure sensor has malfunctions)
in combination with:
FC 0745 (Self-adjustment of mixture formation for enriching at idle for the right-hand cylinder bank is above the permissible limit P 2187)
FC 0749 (Self-adjustment of mixture formation for enriching at idle for the left-hand cylinder bank is above the permissible limit P 2189)
Cause:
Mixture formation faults caused by leaks in the engine / intake manifold may result in incorrect measurements at the
fuel pressure regulator.
Attachments
File
Description
Anlage3.pdf
Example pictures
Remedy:
1. Check engine for leaks using the usual workshop methods (spraying the engine and observing the lambda values)
or using a low-pressure loss detector that operates with smoke and a contrast agent
Potential leaks
1.1 Check oil dipstick for correct seating
1.2 Check sealing rings on oil dipstick for damage
1.3 Check grommet of oil dipstick guide tube at oil pan for damage and correct seating
1.4. When checking the intake manifold for unmetered air, refer to the example pictures in the attachment
A. Vacuum fitting for air shutoff valves not installed
B. O-ring for brake booster vacuum line connection malfunctioning
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C. Vacuum line at connection piece for intake manifold switchover is insecure or loosely seated
D. Seal between intake manifold and engine leaking
E. Seal between top and bottom sections of intake manifold faulty
F. Seal between air filter assembly and intake manifold incorrectly installed
G. Purge line not connected
H. Leakage at guide of shaft for intake manifold switchover
J. Leaks at crankcase ventilation (front hose to centrifugal oil separator, rear pressure regulating valve with line)
Note:
1. Observe tightening pattern of intake manifold mounting bolts
2. Use new bolts/ intake manifold seals
ONLY affects model 164.177 up to VIN xA 185373:
Check diameter of fuel feed line to rail at the height of the metal weave (should be 13.6mm); if the thinner fuel feed line (diameter 11.0mm) is still installed, it must be replaced
Attachments
File
Description
Anzugsschema.jpg
Tightening sequence for intake manifold
Symptoms
Power generation / Engine management / Engine running / Runs rough/shakes
Power generation / Engine management / Engine management indicator lamp / Engine diagnosis / lit
Control unit/fault code
Control unit
Fault code
Fault text
ME 9.7 (AMG)-Motor electro- 3698
nics 9.7 (AMG), ME - Motor
electronics 'ME97 AMG' for
combustion engine 'M156' (N3/
10) (ME97AMG) (C (204),E
(212))
The rail pressure sensor has a malfunction.
ME 9.7 (AMG)-Motor electro- 3698
nics 9.7 (AMG), ME - Motor
electronics 'ME97 AMG' for
combustion engine 'M156' (N3/
10) (ME97AMG) (CL (216),
CLK (209),M (164),E (211),
SL (230),R (251),CLS (219),S
(221))
Fuel pressure control:The lower limit value is reached.(P0191)
([M156*])
ME 9.7 (AMG)-Motor electro- 3699
nics 9.7 (AMG), ME - Motor
electronics 'ME97 AMG' for
combustion engine 'M156' (N3/
10) (ME97AMG) (C (204),E
(212))
The rail pressure sensor has a malfunction.
04-08-2015 8:20 PM
© Copyright Daimler AG
PAHIGGI
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ME 9.7 (AMG)-Motor electro- 3699
nics 9.7 (AMG), ME - Motor
electronics 'ME97 AMG' for
combustion engine 'M156' (N3/
10) (ME97AMG) (CL (216),
CLK (209),M (164),E (211),
SL (230),R (251),CLS (219),S
(221))
Fuel pressure control:The upper limit value is reached.(P0191)
([M156*])
ME 9.7 (AMG)-Motor electro- 0745
nics 9.7 (AMG), ME - Motor
electronics 'ME97 AMG' for
combustion engine 'M156' (N3/
10) (ME97AMG) (CL (216),
CLK (209),M (164),E (211),
SL (230),R (251),CLS (219),S
(221))
Self-adaptation of mixture formation for enrichment at idle for the
right cylinder bank is above the permissible limit.(P2187)
ME 9.7 (AMG)-Motor electro- 0749
nics 9.7 (AMG), ME - Motor
electronics 'ME97 AMG' for
combustion engine 'M156' (N3/
10) (ME97AMG) (CL (216),
CLK (209),M (164),E (211),
SL (230),R (251),CLS (219),S
(221))
Self-adaptation of mixture formation for enrichment at idle for the
left cylinder bank is above the permissible limit.(P2189)
Parts
Part number
ES1 ES2 Designation
Quantity Note
EPC
A 159 141 05 80
Intake manifold seal
2
Order current part as per EPC
X
A 004 990 53 12
Bolt (aluminum)
10
Only use once
X
Work units
Op. no.
Operation text
Time
Damage
code
Note
14005 **
Use damage code according to cause
Validity
Vehicle
Engine
Transmission
*
156.983
*
*
156.980
*
*
156.985
*
*
156.984
*
*
156.981
*
*
156.982
*
04-08-2015 8:20 PM
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