DEFINITION: Driver is unable to maintain consistent, predictable vehicle driving control in any direction.

Road test the vehicle in order to verify the customer complaint.

Does the vehicle exhibit poor directional stability?

Go to Step 2

System OK

1. Ensure that the tires are all the same size, make, and adequate tread depth.
2. Repair as necessary.
3. Ensure that all of the tires are inflated to the correct pressure. Refer to Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label .

Does the vehicle still exhibit poor directional stability?

Go to Step 3

System OK

1. Inspect the stabilizer shaft, links, and insulators for wear or damage.
2. Repair as necessary. Refer to the following:

•	Stabilizer Shaft Link Replacement

•	Stabilizer Shaft Insulator Replacement

Does the vehicle still exhibit poor directional stability?

Go to Step 4

System OK

1. Inspect the lower control arms, ball joints and tie rods for wear or damage.
2. Repair as necessary. Refer to the following:

•	Lower Control Arm Replacement

•	Lower Control Arm Ball Joint Replacement

•	Rack and Pinion Outer Tie Rod End Replacement

Does the vehicle still exhibit poor directional stability?

Go to Step 5

System OK

Inspect the wheel bearings/hubs for looseness or excessive lateral runout. Refer to Wheel Bearings Diagnosis .

Does the vehicle still exhibit poor directional stability?

Go to Step 6

System OK

1. Inspect the vehicle trim height. Refer to Trim Height Inspection .
2. Repair as necessary.

Does the vehicle still exhibit poor directional stability?

Go to Step 7

System OK

Inspect and adjust the wheel alignment as necessary. Refer to Wheel Alignment Measurement .

Does the vehicle still exhibit poor directional stability?

Go to Step 8

System OK

1. Inspect the steering gear and steering column for looseness.
2. Repair as necessary.

Does the vehicle still exhibit poor directional stability?

Go to Step 1

System OK