Using Impulse Counter Scan Tool

Connect Impulse counter scan tool Data Link Connector (X11/4) according to connection diagram. See Fig 1 . Connect the Yellow wire of the impulse counter scan tool to the diagnostic output socket of the system to be tested. See IMPULSE COUNTER DIAGNOSTIC OUTPUT SOCKET IDENTIFICATION table.
Turn ignition on. Press start button for 2-4 seconds. Read and record Diagnostic Trouble Code (DTC).
Press start button again for 2-4 seconds to read the next DTC.
Repeat step 3 until all DTC have been read.

NOTE: Clearing of DTC must begin within 20 seconds of reading the DTC. After 20 seconds, the DTC can no longer be cleared with out displaying that code again.

To clear a DTC, wait 3 seconds after DTC is displayed then press the start button for 6-8 seconds. Each DTC must be cleared individually.

IMPULSE COUNTER DIAGNOSTIC OUTPUT SOCKET IDENTIFICATION

System To Be Tested	Diagnostic Output Socket No.
EA/CC/ISC	7
Engine Control Module (LH-SFI)	4
Diagnostic Module	19
Base Module	8
Distributor Ignition Module	17

Fig 1: Connecting Test Equipment, Reading & Erasing Diagnostic Trouble Code Memory

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Data Link Connector Pin Identification

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 3: Identifying Impulse Counter Scan Tool Special Tools

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.