LI07.00-N-059118

Limp-home mode and delayed or non-existent upshift in combination with severe vibrations (in vehicles with automatic transmission)
Topic number
LI07.00-N-059118
Version
1
Design group
07.00 General
Date
06-03-2014
Validity
Model 906 with engine OM642
Reason for change
Reason for block
Complaint:
After a cold start and/or under full-load conditions, there is a delayed or non-existent upshift (in vehicles with automatic transmission) in combination with severe vibrations. The engine switches to limp-home mode, has an interruption
of tractive power, jolts, etc.. The CHECK ENGINE indicator lamp (MIL) lights up and various fault codes are logged
in the fault memory, such as messages concerning boost pressure or boost pressure control deviation, injection, rail
pressure, etc.
Cause:
Leak oil line damaged.
Restrictor (T-piece) of leak oil line damaged.
Incorrect T-piece due to prior incorrect repair (see Figure 01).
Note: An incorrect or incorrectly matched restrictor (T-piece) can result in power degradation, fault entries (rail pressure faults, boost pressure faults) and limp-home mode (see Figure 01).
Remedy:
1.
Perform guided tests for the individual fault codes and process the faults if there are fault entries in the control
unit. If all guided tests pass, proceed to Step #2.
2.
Visual inspection of leak oil line and restrictor.
3.
If there is a fault in the leak oil line or restrictor (T-piece) or if the wrong restrictor is installed, replace the leak oil
line.
Note: The connections of the leak oil line must never be separated or replaced by other components! Always replace
the entire leak oil line complete.
Attachments
File
Description
01 .jpg
Restrictor (T-piece)
Symptoms
Power transmission / Power transmission, function / Vibrations
Power generation / Engine management / Engine management indicator lamp / Engine diagnosis / lit
Power generation / Engine management / Engine performance / Poor/delayed throttle response
06-03-2014 10:56 PM
© Copyright Daimler AG
DAVANDE
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Control unit/fault code
Control unit
Fault code
Fault text
CDI6Common Rail Diesel Injection (CR6NFZ)
123900
Charge pressure is too low.
Parts
Part number
ES1 ES2 Designation
A 642 070 81 32
Quantity Note
Leak oil line
EPC Other
make
part
1
X
Work units
Op. no.
Operation text
Time
54-0650
Damage
code
Note
07074 F7
54-1011
07-0641
07-9110
01-4009
Validity
Vehicle
Engine
Transmission
Sprinter III
642
*
Attachments
06-03-2014 10:56 PM
© Copyright Daimler AG
DAVANDE
Page 2/3
01 .jpg:
06-03-2014 10:56 PM
© Copyright Daimler AG
DAVANDE
Page 3/3