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COMBINATION METER TSB Revision CHASSIS ELECTRICAL 54A-77 STEP 4. Using scan tool MB991958, check data list. • Item 80: Speedometer • Should read vehicle speed. (3) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 5. STEP 5. Using scan tool MB991958, check actuator test. • Item 1: Speedometer • The speedometer operates up to the set position. (3) Turn the ignition switch to the "LOCK" (OFF) position. YES : Go to Step 6. STEP 6. Retest the system. YES : The procedure is complete. Inspection Procedure 3: The tachometer does not work (the other meters work). . TECHNICAL DESCRIPTION (COMMENT) If only the tachometer does not operate, the ignition . TROUBLESHOOTING HINTS • The combination meter may be defective • The engine control module may be defective DIAGNOSIS Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: Vehicles 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) |