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SYMPTOM PROCEDURES TSB Revision SIMPLIFIED WIRING SYSTEM (SWS) 54B-304 STEP 1. Use scan tool MB991958 to select "ECU COMM • Column switch (column-ECU) • Front-ECU CAUTION To prevent damage to scan tool MB991958, always turn the ." (2) Turn the ignition switch to the "LOCK" (OFF) position. below to display "ECU COMM Check." (4) Scan tool MB991958 should show "OK" on the "ECU COMM Check" menus for both the "COLUMN ECU" and Q: Is "OK" displayed for both the "COLUMN ECU" and "FRONT ECU" menus? to Inspection Procedure A-2 "Communication with the "NG" is displayed for the "FRONT ECU" menu : Refer to Inspection Procedure A-4 "Communication with the AC305411AB MB991910 DATA LINK CONNECTOR MB991827 MB991824 MB991806 MB991812 AC302210 COLUMN SWITCH COLUMN SWITCH MB991812 AB |