STS AWD V8-4.6L VIN A (2006)
The numbers below refer to the step numbers on the diagnostic table.
2. This test is to verify that the symptom is present during diagnosing. Other vehicle components may cause a similar symptom.
3. This test is to verify that one of the drive belts is causing the rumbling noise. Rumbling noise may be confused with an internal engine noise due to
the similarity in the description. Remove only one drive belt at a time if the vehicle has multiple drive belts. When removing the drive belts the
water pump may not be operating and the engine may overheat. Also DTC's may set when the engine is operating with the drive belts removed.
4. Inspecting the drive belts is to ensure that they are not causing the noise. Small cracks across the ribs of the drive belt will not cause the noise. Belt
separation is identified by the plys of the belt separating and may be seen at the edge of the belt our felt as a lump in the belt.
5. Small amounts of pilling is normal condition and acceptable. When the pilling is severe the drive belt does not have a smooth surface for proper
operation.
Step 1 - Step 8
Drive Belt Squeal Diagnosis
Drive Belt Squeal Diagnosis
Diagnostic Aids
A loose or improper installation of a body component, a suspension component, or other items of the vehicle may cause the squeal noise.
If the noise is intermittent, verify the accessory drive components by varying their loads making sure they are operated to their maximum capacity. An
overcharged A/C system, power steering system with a pinched hose or wrong fluid, or a generator failing are suggested items to inspect.
Test Description
