8. DRIVE BELT (FOR GENERATOR, WATER PUMP, POWER STEERING OIL PUMP) (CHECK CONDITION)

Water Pump and Generator Drive Belt Tension Check and Adjustment <When using scan tool MB991958> Required Special Tools: • MB991668: Belt Tension Meter Set • MB991958: Scan Tool (MUT-III Sub Assembly) MB991824: V.C.I. MB991911: MUT-III Main Harness B

To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. 1.Connect special tool MB991668 to scan tool MB991958. 2.Connect scan tool MB991958 to the data link connector. 3.Turn the ignition switch to the "ON" position and select scan tool MB991958 "Belt Tension Measurement" from the menu screen.

4.As shown in the illustration, keep the microphone (MB991668) 10 to 20 mm (0.39 - 0.79 inch) away from the back side of the belt perpendicularly (within an inclination of ± 15 degrees). 5.With your finger tip lightly tap the center of the belt between the pulleys in the location shown by the arrow in the illustration to check whether the belt vibration frequency is within the standard. ITEM SPECIFICATION Vibration frequency Hz A 216 - 265 B 146 - 180 Measure when the belt surface temperature is close to room temperature. Make sure that water or oil, etc., does not get on the microphone. If a strong wind blows or noise is made close to the microphone during measure, the meter will show a value that differs from the actual value. If the measurement is taken with the microphone touching the belt, the meter will show a value that differs from the actual value. Do not measure while the engine is running.