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CHARGING SYSTEM TSB Revision ENGINE ELECTRICAL 16-11 REGULATED VOLTAGE TEST M1161001102424 Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: V.C.I. • MB991827: M.U.T.-III USB Cable • MB991910: M.U.T.-III Main Harness A • MB991519: Generator Harness Connector This test determines whether the voltage regulator is WARNING Battery posts, terminals and related acces- 1. Always be sure to check the following before the test: • Generator installation • Check to be sure that the battery installed in the vehicle is fully charged. (Refer to GROUP 54A, − Battery − On-vehicle Service − Battery Check • Generator drive belt tension (Refer to GROUP 00, General − Maintenance Service − Drive Belts (For Generator, Water Pump, Power Steering Oil • Fusible link • Abnormal noise from the generator while the engine is running. 2. Turn the ignition switch to the "LOCK" (OFF) position. 3. Disconnect the negative battery cable. connector: MB991519) to connect a digital-type 5. Connect a clamp-type DC test ammeter to the generator "B" terminal output wire. 6. Reconnect the negative battery cable. MB991958. 8. Turn the ignition switch to the "ON" position and check that the reading on the voltmeter is equal to AK700035 AB Battery CAN communication Ammeter (clamp-type) Load Blue MB991519 Voltmeter (digital-type) Yellow Red Black Generator B FR L S G Generator Combination meter + + ECM – – |