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SYMPTOM PROCEDURES TSB Revision SIMPLIFIED WIRING SYSTEM (SWS) 54B-407 STEP 4. Use scan tool MB991958 to select "ECU COMM Check the ETACS-ECU. CAUTION Connect special tool MB991910 before connecting special monitor ." (2) Turn the ignition switch to the "ON" position. below to display "ECU COMM Check." (4) Scan tool MB991958 should show "OK" on the "ECU COMM Check" menu for the "ETACS ECU" menu. Q: Is "OK" displayed for the "ETACS ECU" menu? YES : Go to Step 5. with ETACS-ECU is not possible STEP 5. Replace the combination meter. normally. Q: Are the turn-signal indicator lights in good condition? YES : No action is necessary and testing is complete. light indicator lights illuminate normally. AC305411AB MB991910 DATA LINK CONNECTOR MB991827 MB991824 MB991806 MB991812 AC302210 COLUMN SWITCH COLUMN SWITCH MB991812 AB |