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ON-VEHICLE SERVICE ENGINE MECHANICAL <4A9> 11A-10 3. Press number key 1. Check to ensure that "No. 01" appears on the upper left of the display and mass select display appears. (2) Press the "UP" or "DOWN" button to select "01 1.5GT 0.9" and press the "MEASURE" button (3) Press the "WIDTH" button to change to the belt width input display. (4) Press number keys 0, 1, 0, and 0 sequentially, and press the "SELECT" button to apply them. (5) Press the "SPAN" button to change to the span length input display. (6) Press number keys 0, 1, 0, and 0 sequentially, and press the "SELECT" button to apply them. 4. Press "Hz" button twice to change the display to the frequency display (Hz). CAUTION • Do not allow any contaminants such as water or oil to get onto the microphone. • If strong gusts of wind blow against the microphone or if there are any loud sources • If the microphone is touching the belt while the measurement is being made, the values • Do not take the measurement while the vehi- cle's engine is running. ACB01455AB 10 – 15 mm 15˚ 15˚ Crankshaft pulley Gentry tap MB992080 Power steering 5. Hold the special tool MB992080 to the middle of the drive belt between the pulleys (at the place − 15 mm away from the rear surface of the drive belt so that ± 15°). 6. Press the "MEASURE" button. pulleys (the place indicated by the arrow) with Standard value (Reference): 108 − 221 Hz NOTE: To take the measurement repeatedly, fillip 8. After the completion of the measurement, press and hold the "POWER" button to turn off the 9. If not within the standard value, replace the power steering oil pump drive belt (Refer to ). |