Power Steering Drive Belt Tension Check
POWER STEERING DRIVE BELT TENSION CHECKWHEN USING SCAN TOOL MB991958
Required Special Tools:
^ MB991668: Belt Tension Meter Set
^ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
^ MB991824: Vehicle Communication Interface (V.C.I.)
^ MB991910: M.U.T.-III Main Harness
Gently tap the middle of the belt between the pulleys (the location indicated by the arrow) with your finger as shown in the illustration, and check that the vibration frequency of the belt is within the standard value.
NOTE: Refer to for details on the method of measuring the vibration frequency using the scan tool.
Standard value:
WHEN USING TENSION GAUGE
Use a belt tension gauge to check that the belt tension is within the standard value.
Standard value:
BELT DEFLECTION CHECK
Apply approximately 98 N (22 lb) of force to the middle of the drive belt between the pulleys (at the place indicated by the arrow) and check that the amount of deflection is within the standard value.
Standard value:
If the tension or deflection is outside the standard value, adjust by the following procedure.
1. Loosen the tensioner pulley lock nut.
2. Adjust the belt tension to the standard value by turning the adjusting bolt. The tension will increase when turning the adjusting bolt clockwise, and decrease when turning counterclockwise.
3. Tighten the lock nut to the specified torque.
Tightening torque: 49 ±9 Nm (36 ±7 ft-lb)
4. Tighten the adjusting bolt.
Tightening torque: 5.0 ±1.0 Nm (44 ±9 in-lb)
CAUTION: Check after turning the crankshaft one or more rotations clockwise.
5. Check the belt deflection amount and tension, and readjust if necessary.