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STEP 3. Using scan tool MB991958, Check whether the ZC501967 AC404789 ZC5019680000 MB991824 MB991827 MB991910 Data link connector To prevent damage to scan tool MB991958, always turn the (1) Connect scan tool MB991958. Refer to "How to connect scan (2) Turn the ignition switch to the "ON" position. (3) Erase the DTC. (4) Turn the ignition switch from "LOCK" (OFF) position to "ON" (5) Check if DTC is set. Q:Is DTC 22 set? YES: Go to Step 4. NO: The procedure is complete. STEP 4. Check headlight automatic leveling-ECU connector Q:Is headlight automatic leveling-ECU connector C-110 in good condition? YES: Go to Step 5. NO: Repair the damaged parts. STEP 5. Check the wiring harness between front height NOTE: Before the wiring harness check, check the intermediate connector A-57, and repair that if necessary. Q:Is wiring harness between front height sensor connector A-04 (terminal No. 1/2/3) and the headlight automatic leveling-ECU connector C-110 (terminal No 15/17/19) in good condition? YES: Go to Step 6. NO: Repair the wiring harness. STEP 6. Using scan tool MB991958, Check whether the (1) Turn the ignition switch to the "ON" position. (2) Erase the DTC. (3) Turn the ignition switch from "LOCK" (OFF) position to "ON" (4) Check if DTC is set. Q:Is DTC 22 set? LIGHTING 54Ac-65 DIAGNOSIS |