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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 drive belt
auto-tensioner.
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2.Remove the drive belt
(Refer to ).
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![](../../../img/11/ACB01502AB00ENG.png)
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3.Turn the drive belt
auto-tensioner to the left and right to check and see that
it moves
smoothly without any binding. 4.If there are any
problems in the procedure 1 or 3, replace the drive belt
auto-tensioner
(Refer to GROUP 16 -
Charging System, Alternator Assembly ). 5.Install
the drive belt (Refer to ).
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The drive belt auto-tensioner can
be checked whether it is in good condition by checking
its tension.
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1.Check the tension of the
drive belt (Refer to ).
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![](../../../img/11/AC507219AB00ENG.png)
![](../../../img/11/ACB01504AB00ENG.png)
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2.Check the tension of the
drive belt in 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)
Press number key 1. Check to ensure that "No. 01" appears on
the upper left of the
display and that the following numeric values are displayed
for individual items (M, W, and
S): M 000.9 g/m W 010.0 mm/R S 0100 mm If
numeric values have not been entered (new tool), set them
according to the belt specifications
as shown below. Once you set them, you do not have to set
them again. The settings remain undeleted
even after battery replacement.
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note |
This operation is
to temporarily set the preset data
such as the belt
specifications, because if the
measurement is taken without input
of the belt specifications,
conversion to tension value (N)
cannot be made, resulting in
judgement of error.
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<Setting procedure> .....1.
Press down the "MASS" button till the belt mass select
display appears. .....2.
Press the "UP" or "DOWN" button to select "01 1.5GT 0.9" and
press the "MEASURE" button
to decide it. Check to ensure that "M 000.9 g/m" is
displayed. .....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. Check to ensure that "W 010.0 mm/R" appears on the
display. .....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. Check to ensure that "S 0100 mm" appears on the
display. (4)
Press "Hz" button twice to change the display to the
frequency display (Hz). (5)
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caution |
- The temperature of the
surface of the belt should
be as close to normal
temperature as
possible.
- 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
drive belt between the pulleys (at the
place indicated by arrow) where it does not contact the
drive belt (approximately 10 -
15
mm away from the rear surface of the belt) so that it is
perpendicular to the drive belt (within
an angle of ±
15°). (6)
Press the "MEASURE" button. (7)
Gently tap the middle of the drive 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 drive belt is within the standard
value. Standard value (Reference): 57 -
185 Hz
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note |
To take the
measurement repeatedly, fillip the
drive belt again.
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(8)
Press and hold the "POWER" button to turn off the power
supply. 3.If not within the standard value,
replace the drive belt auto-tensioner (Refer to
GROUP 16 -
Charging System, Alternator Assembly ).
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1.Check the tension of the
drive belt (Refer to ).
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![](../../../img/11/ACB01505AB00ENG.png)
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2.Use a belt tension gauge
in the middle of the drive belt between the pulleys shown in
the figure (at the place indicated by the arrow) to check
that the drive belt tension is within
the standard value. Standard value (Reference):
91 -
989 N 3.If not within the standard value,
replace the drive belt auto-tensioner (Refer to
GROUP 16 -
Charging System, Alternator Assembly ).
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