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Checking the belt tension by vibration frequency with the connection of a special device to the vehicle's diagnostic connector.
Checking Belt Tension Using a Strain Gauge
Belt Tension Standards
| Measured and controlled parameter | When checking and adjusting the belt | When installing a new belt |
| Belt natural frequency | 222.5-251.0 Hz | 259.8-300.0 Hz |
| Tension force | 363-462 N | 495-660 N |
| Deflection when pressed with a force of 100 N | 6.8-8.0mm | 5.1-6.4 mm |
Checking belt tension for deflection
If the belt tension does not correspond to the given values, tension it by turning the adjusting screw, after loosening the tensioner pulley nut.
After adjustment, tighten the nut and, turning the crankshaft clockwise 1 or 2 times, check again and, if necessary, correct the tension.
