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COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR TSB Revision CHASSIS ELECTRICAL 54-79 TECHNICAL DESCRIPTION (COMMENT) . TROUBLESHOOTING HINTS • Malfunction of the vehicle speed sensor • Malfunction of the combination meter (printed-cir- cuit board or speedometer and tachometer) • Malfunction of the powertrain control module (PCM) • Damaged harness wires or connectors . DIAGNOSIS Required Special Tools: • MB991223: Harness Set • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: Vehicle Communication Interface (V.C.I.) • MB991827: MUT-III USB Cable • MB991911: MUT-III Main Harness B (Vehicles without CAN communication system) STEP 1. Using scan tool MB991958, read the MFI system CAUTION To prevent damage to scan tool MB991958, always turn the YES : Go to Step 15. STEP 2. Check the odometer and trip odometer operation. YES : Go to Step 12. AK303629AB MB991911 MB991827 MB991824 16-PIN |