E 320 Coupe (124.052) L6-3.2L (104.992) (1994)
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Data Link Connector: Description and Operation
Model 124, California Version
Stored DTC's can be read at the diagnostic connector (X11/4) using either an impulse counter scan tool or the Mercedes Hand-Held Tester (HHT).
On California vehicles, DTC's from the Diagnostic Module (DM) can be accessed without special tools by means of the push button LED (X11/21s1),
which is integrated into the diagnsotic connector (X11/4). Codes from all other modules still require the use of either an impulse counter scan tool or the
Mercedes HHT.
Refer to Computers and Control Systems, System Diagnosis for instructions on how to access the DTC's. See: Testing and Inspection
NOTE: Diagnosis via an on-off ratio readout has been eliminated.
The retained diagnostic trouble code (DTC) memory feature of the diagnostic module has been replaced with DTC memory which is cleared after
disconnecting the vehicle's battery (DM voltage supply).
In addition, the DTC readout "1" (no malfunction in system) does not appear after clearing the DTC memory (disconnecting the vehicle's baffery).
DTC readout 1" only reappears during the vehicle's subsequent trip after the diagnostic module has confirmed that all monitored systems and their
respective components are ok (no malfunctions).
