Drive Belt: Check [VQ40DE]

WARNING: Be sure to perform when the engine is stopped.

Remove air duct and resonator assembly when inspecting drive belt. Refer to AIR CLEANER AND AIR DUCT: REMOVAL AND INSTALLATION
Make sure that the auto tensioner indicator is within the allowable working range (A) as shown.

Fig 1: Identifying Auto Tensioner Indicator Allowable Working Range
Courtesy of SUZUKI OF AMERICA CORP.
Visually check entire belt for wear, damage or cracks.
If the indicator is out of allowable working range or drive belt is damaged, replace the drive belt. Refer to DRIVE BELTS: REMOVAL AND INSTALLATION