E 430 4MATIC (210.083) V8-4.3L (113.940) (2000)
Pneumatic System: Initial Inspection and Diagnostic Overview
The Diagnostic Test Procedures consist of DIAGNOSIS and TEST PROGRAMS for electronically controlled systems.
DIAGNOSIS:
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Function Test - Provides a quick and easy inspection of the system.
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Diagnostic Trouble Code (DTC) Memory - Narrows down the test procedure through means of reading out the stored DTC's.
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Diagnostic Chart - Shows you where to enter the test when the system failure is not indicated with a DTC.
NOTE: The Diagnosis references you directly to the appropriate Test.
TEST PROGRAM:
The Test Program is divided into Electrical and Pneumatic Test Groups, depending upon the system. Each Test Group contains a Component
Location, Preparation For Test and a Test section.
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Component Locations - The location of components referenced in the test are shown.
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Preparation For Test - Shows all equipment, special tools and references to ensure a smooth execution of the test.
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Test - Performing the test. As a rule, enter the test via diagnosis. Consists of primary and secondary test steps, test values.
NOTE:
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Prior to performing a Test, review the Component Locations and Preparation for Test sections.
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Depending upon the particulars of the case, the Test Program will direct you accordingly.
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All Diagnostic troubleshooting must begin by "CHECKING THE BASICS". Certain basic faults can be undetectable by the self-diagnostic
system of the ACC control unit.
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When a wire is listed in the "Possible cause/Remedy" column, all connectors between the control unit and the component being tested are to
be included as a possible failure source.
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When using the 126 socket Socket Box Tester, see the appropriate wiring diagram for a description of the socket nomenclature.