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HEADLIGHT TSB Revision CHASSIS ELECTRICAL 54A-117 . DIAGNOSTIC FUNCTION When the right bulb of turn-signal light is blown, the . TECHNICAL DESCRIPTION (COMMENT) The ETACS-ECU sets DTC B16A4 under the follow- • If there is a malfunction to the right turn-signal light bulb, the blown right bulb counter counts • If the blown right bulb counter reaches "3," the DTC B16A4 is set. . TROUBLESHOOTING HINTS • Malfunction of turn-signal light bulb (right side) • Malfunction of the ETACS-ECU • The wiring harness or connectors may have loose, corroded, or damaged terminals, or termi- DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: Vehicle Communication Interface (V.C.I.) • MB991827: M.U.T.-III USB Cable • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system) STEP 1. Bulb check. YES : Go to Step 2. illuminate. AC708948 A-02 (B) AG Connectors: A-02, A-57 A-57 (B) AC708972 Connectors: C-304, C-311 AW C-311 C-304 AC708955 Connector: D-11 AO AC708970AI Connector: F-06 |