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SYMPTOM PROCEDURES TSB Revision SWS SYMPTOM PROCEDURES 54Bb-311 STEP 2. Check the input signal by using "FUNCTION • Ignition switch: ON • Lighting switch: HEAD Operate scan tool MB991502 according to the procedure below 1. Select "SYSTEM SELECT." Check that normal conditions are displayed on the items Q: Are normal conditions displayed on the "HEADLIGHT SW", "H/L AUTO-CUT" and "FRONT ECU ACK"? • Normal condition is not displayed on the "HEADLIGHT SW": Refer to Inspection Procedure • Normal condition is not displayed on the "H/L AUTO-CUT": Refer to Inspection Procedure J-9 • Normal condition is not displayed on the "FRONT ECU ACK": Replace the front-ECU. Verify that the ITEM NO. ITEM NAME NORMAL ITEM 00 HEADLIGHT SW ON ITEM 35 H/L AUTO-CUT OFF ITEM 70 FRONT ECU ACK NORMAL ACK AC204222AB 16-pin 13-pin MB991502 MB991862 |