Specifications

ENGINE <4G9-GDI> – On-vehicle Service
11A-8
POWER STEERING OIL PUMP AND AIR CONDITIONER
COMPRESSOR DRIVE BELT TENSION CHECK AND
ADJUSTMENT
1. Check if the belt tension is within the standard value using
one of the methods below.
Standard value:
Items When
checked
When
adjusted
When
replaced
Vibration
frequency
Hz
114 – 139 121 – 133 145 – 166
Tension N 392 – 588 441 – 539 637 – 834
Deflection
(Reference
value) mm
10.0 – 12.0 10.0 – 11.0 7.0 – 9.0
<When measuring the vibration frequency>
With your finger tip lightly tap the centre of the belt between
the pulleys in the location shown by the arrow in the
illustration and then measure the belt vibration frequency.
NOTE
Refer to P.11A-7 for information regarding the vibration
frequency measurement method using MUT-II.
<When measuring the tension>
Use a belt tension gauge to measure the belt tension.
<When measuring the deflection>
Apply 98 N of pressure against the location between the
pulleys shown by the arrow in the illustration and then
measure the deflection.
2. If the tension or deflection is outside the standard value,
adjust by the following procedure.
(1) Loosen tensioner pulley fixing nut A.
(2) Adjust the amount of belt deflection using adjusting
bolt B.
(3) Tighten fixing nut A.
Tightening torque: 25 Nm
(4) Check the belt deflection amount and tension, and
readjust if necessary.
Caution
Check after turning the crankshaft once or more
clockwise (right turn).
Crankshaft
pulley
Tension
pulley
A
B
A/C
compressor
pulley
Oil pump pulley