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Checking the belt tension by vibration frequency by connecting a special device to the vehicle's diagnostic connector.
Checking belt tension using a strain gauge attachment
Standard belt tension values
| Measured and controlled parameter | When checking and adjusting the belt | When installing a new belt |
| Natural frequency of belt vibrations | 222.5-251.0 Hz | 259.8-300.0 Hz |
| Tension force | 363-462 H | 495-660 N |
| Deflection when pressed with a force of 100 N | 6.8-8.0 mm | 5.1-6.4 mm |
Checking belt tension by deflection
If the belt tension does not correspond to the specified values, tighten it by turning the adjusting screw, after loosening the tensioner pulley nut.
After adjustment, tighten the nut and, after turning the crankshaft clockwise 1 or 2 times, check again and, if necessary, adjust the tension.
