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CHARGING SYSTEM TSB Revision ENGINE ELECTRICAL 16-12 13.If the voltage reading conforms to the value in the voltage regulation table, then the voltage regulator 14.After the test, lower the engine speed to idle. 15.Turn the ignition switch to the "LOCK" (OFF) position. 16.Disconnect the engine tachometer or scan tool MB991958. 17.Disconnect the negative battery cable. VOLTAGE REGULATION TABLE WAVE PATTERN CHECK USING AN M1161001200180 . MEASUREMENT METHOD Connect the oscilloscope special patterns pick-up to the gener- . STANDARD WAVEFORM INSPECTION TERMINAL VOLTAGE REGULATOR °C ( °F)] STANDARD VALUE (V) Terminal "S" −20 (−4) 14.2 − 15.4 20 (68) 13.9 − 14.9 60 (140) 13.4 − 14.5 80 (176) 13.1 − 14.2 AKX00188 GENERATOR OSCILLOSCOPE "B" TERMINAL PROBE AB Observation Conditions FUNCTION SPECIAL PATTERNS Pattern height Variable Variable knob Adjust while viewing the wave Pattern selector Raster Engine revolutions Curb idle speed |