300E (124.026) L6-2.6L (103.940) (1990)
Engine Control Module: All Technical Service Bulletins
Control Module - (CIS-E) Corrected Current to EHA
REF. NO. 07.3/48
TO:
OUR MERCEDES-BENZ PASSENGER CAR DEAL
DATE:
June 1991
SUBJECT:
ALL MODELS WITH ENGINE 104
A.
MODIFIED CIS-E CONTROL UNIT
B.
MEASURING CURRENT ON ELECTRO-HYDRAULIC ACTUATOR
A.
Modified CIS-E Control Unit
Since September 1990, modified CIS-E control units are installed which ensure that the nominal value of the electro-hydraulic actuator current is
reached without time delay when switching on the ignition.
Under certain circumstances, the EHA milliamp value on previous CIS-E control units, of the above mentioned engines, could have been off by +/-
milliamps from the nominal value for up to 15 minutes after the ignition was turned to "OFF".
Note:
This condition did not affect the running of the engine, however, components could be unnecessarily replaced due to the ignition "ON" current
at the EHA not meeting nominal values.
Effective Serial Number
Model
Chassis End Number
124
B 343721
129
F 019363
The modified CIS-E control units are exchangeable with the previous version.
B.
Measuring Current on Electro-Hydraulic Actuator
When measuring the current on the electro-hydraulic actuator (after switching on the ignition) a deviation of +/- 13 mA from the relevant nominal value
is permissible. After 15 minutes, with the ignition on, the relevant nominal value must be reached.
For nominal current values, refer to test and adjustment data in Diagnostic Manual, Model 129, Engines, Section 1.1.4.
If the current values meet the above mentioned criteria, the control unit is in order and does not need to be replaced.
Parts Information
Part Name
Part Number
Part Number
Model Application
(Old)
(Modified)
CIS-E Control Unit
011 545 13 32
011 545 13 32
124.051 - Federal version
011 545 14 32
011 545 44 32
124.051 - California version
011 545 34 32
011 545 45 32
129.061 - Fed. 5-speed manual trans.
011 545 09 32
011 545 38 32
129.061 - Fed. 5-speed automatic trans.
011 545 06 32
011 545 10 32
129.061 - Calif. 5-speed manual trans.
011 545 35 32
011 545 46 32
129.061 - Calif. 5-speed automatic trans.
In Case of Warranty
Operation:
Electro-hydraulic actuator (EHA). Please select proper code for type of damage from Damage Code Microfiche, Topic 07.31.
Damage Code
Operation Number
Time
Model(s)
07261..