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1.Turn off the engine from
the idle state then check to see that the drive belt is not
protruding from the pulley width of the
auto-tensioner.
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2.Remove the drive belt
(Refer to ).
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![](../../../img/11/AC507703AC00ENG.png)
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3.Install the tool to the
auto-tensioner, and check that no binding is present by
turning the auto-tensioner in the left and right
directions. 4.If there are any problems in the
procedure 1 or 3, replace the auto-tensioner (Refer to ). 5.Install
the drive belt (Refer to ).
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The auto-tensioner can be checked
whether it is in good condition by checking its
tension.
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1.Check the drive belt
tension (Refer to ).
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![](../../../img/11/AC507219AB00ENG.png)
![](../../../img/11/AC805802AI00ENG.png)
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2.Measure the drive belt
tension vibration frequency by the following
procedures: (1)
Connect special tool microphone assembly (MB992082) to
special tool belt tension meter (MB992081) of special tool
belt tension meter set (MB992080). (2)
Press the "POWER" button to turn on the power supply. (3)
Check how the belt tension meter is set. (4)
Press "Hz" button twice to change the display to the
frequency display (Hz). (5)
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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
of noise nearby, the values
measured by the microphone
may not correspond to actual
values.
- If the microphone is
touching the belt while the
measurement is being made,
the values measured by the
microphone may not
correspond to actual
values.
- Do not take the measurement
while the vehicle’s
engine is running.
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Hold special tool MB992080 to the middle of the belt
between the pulleys (at the place indicated by arrow) where
it does not contact the belt (approximately 10 - 15 mm
away from the rear surface of the belt) so that it is
perpendicular to the belt (within an angle of ± 15
°). (6)
Press the "MEASURE" button. (7)
Gently tap the middle of the belt between the pulleys (the
place 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. Standard
value (Reference): 107 - 151 Hz
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note |
To take the
measurement repeatedly, fillip the
belt again.
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3.If not within the standard value, replace
the auto-tensioner (Refer to ).
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1.Check the drive belt
tension (Refer to ).
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![](../../../img/11/AC805803AH00ENG.png)
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2.Use a belt tension gauge
in the middle of the belt between the pulleys shown in the
figure (at the place indicated by the arrow) to check that
the belt tension is within the standard
value. Standard value (Reference): 196 -
392 N 3.If not within the standard value,
replace the auto-tensioner (Refer to ).
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