Has a vehicle road test been completed?

Go to Step 2

Go to Diagnostic Starting Point - Tires and Wheels

Caution: Wear gloves when inspecting the tires in order to prevent personal injury from steel belts sticking through the tire.

1. Raise and support the vehicle with safety stands. Refer to Lifting and Jacking the Vehicle.
2. Mark the tyre in order to note the start and the stop position.
3. Rotate each tyre and wheel assembly by hand.
4. Visually inspect the tyre and wheel assemblies for the following:

•	Debris build-up, such as packed mud, undercoating, ice/snow buildup, road tar, etc.

•	Damage, abnormal or excessive wear

Do any of the tyre and wheel assemblies exhibit any of the conditions listed?

Go to Step 3

Go to Step 4

1. Remove the debris from the tyre and wheel assemblies.
2. Replace the damaged, abnormally or excessively worn wheels or tyres as necessary. Refer to Tire Dismounting and Mounting.

Did you complete the repair or replacement?

Go to Step 8

--

Measure the on-vehicle runout of the tyre and wheel assemblies. Refer to Tire and Wheel Assembly Runout Measurement - On-Vehicle.

Does the runout measurement indicate a runout concern?

Go to Step 5

Go to Step 9

Measure the off-vehicle runout of the tyre and wheel assemblies. Refer to Tire and Wheel Assembly Runout Measurement - Off Vehicle.

Does the runout measurement indicate a runout concern?

Go to Step 15

Go to Step 6

Are any of the tyre and wheel assembly runout measurements marginal; within acceptable limits, but close to the maximum?

Go to Step 7

Go to Step 12

Important: Ensure that each tyre and wheel assembly is match-mounted and balanced before reinstalling to the vehicle.

1. Match-mount the tyre to the wheel for each tyre and wheel assembly with marginal runout. Refer to Tire-to-Wheel Match-Mounting (Vectoring).
2. Measure the runout of each match-mounted tyre and wheel assembly. Refer to Tire and Wheel Assembly Runout Measurement - Off Vehicle.

Were you able to significantly reduce the amount of tyre and wheel assembly runout?

Go to Step 8

Go to Step 15

Remeasure the on-vehicle runout of the tyre and wheel assemblies. Refer to Tire and Wheel Assembly Runout Measurement - On-Vehicle.

Does the measurement indicate a runout concern?

Go to Step 12

Go to Step 17

Inspect the balance of the tyre and wheel assemblies. Refer to Tire and Wheel Balancing .

Are any or the tyre and wheel assemblies out of balance?

Go to Step 10

Go to Step 11

Balance the tyre and wheel assemblies as necessary. Refer to Tire and Wheel Balancing .

Did you complete the repair or replacement?

Go to Step 17

--

1. Inspect the brake discs for damage.
2. Inspect the brake disc assembled lateral runout. Refer to Brake Rotor Assembled Lateral Runout Correction.

Are any of the brake discs damaged and/or indicate a runout concern?

Go to Step 14

Go to Step 16

Measure the runout of the hub/axle flanges. Refer to Front Wheel Hub Assembly Inspection

Does the runout measurement indicate a runout concern?

Go to Step 13

Verify customer concern, go to Strategy Based Diagnosis.

Replace components as required. Refer to the following procedures as necessary:

Did you complete the replacement?

Go to Step 17

--

Replace the brake discs as necessary. Refer to the appropriate procedure:

Did you complete the replacement?

Go to Step 17

--

Replace any tyres and/or wheels that were isolated as the cause of the disturbance, as necessary. Refer to Tire Dismounting and Mounting in Tires and Wheels.

Did you complete the replacement?

Go to Step 17

--

Finish-balance the tyre and wheel assemblies on-vehicle. Refer to Tire and Wheel Balancing in Tires and Wheels.

Did you complete the on-vehicle finish balancing?

Go to Step 17

--

1. Install or connect any components that were removed or disconnected during diagnosis.
2. Operate the vehicle in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 4