Dynamic

The automatic drive belt tensioner can be checked dynamically as follows:
1. With the engine running, observe drive belt tensioner movement, The tensioner should move (respond) when the air conditioning clutch cycles (if equipped), or when the engine is accelerated rapidly. If the tensioner movement is constant without air conditioning clutch cycling or engine acceleration, a pulley or shaft is probably bent, or a pulley is out of round. Excessive drive belt rideout (uneven depth of grooves in the drive belt) can cause excess tensioner movement. Check condition by installing a new drive belt.
2. With the engine off, check routing of the drive belt.
3. Inspect the belt tensioner wear indicator to confirm the drive belt is within operating range. Install a new belt if necessary.
4. Rotate the belt tensioner and check for a binding or seized condition. Install a new tensioner if necessary.