Lead/Pull Correction Table
Step
| Action
| Value(s)
| Yes
| No
|
DEFINITION: Lead/pull
is the deviation of the vehicle from a straight path on a level road with
no pressure on the steering wheel. Lead is usually caused by the following
conditions:
| • | Uneven brake assemblies |
| • | Improper tire and wheel alignment In the front tires (rear tires
will not cause lead) |
| • | Tire construction can be a cause of lead in a vehicle. An example
of this is placement of the belt. Off center belts on radial tires can cause
the tire to develop a side force while rolling straight down the road, and
the tire will tend to roll like a cone. |
|
1
| Inspect and repair/replace
tire/wheel assemblies for:
| • | Excessive/uneven tire wear. |
| • | Excessive radial/lateral wheel runout. |
Is action complete?
| --
|
Go to Step 2
| --
|
2
| Inspect and repair front and rear suspensions for:
| • | Excessive wheel bearing play. |
Is action complete?
| --
|
Go to Step 3
| --
|
3
| Inspect and repair power steering gear and pump for:
| • | Variable Effort steering for DTCs. |
Is action complete?
| --
|
Go to Step 4
| --
|
4
|
- Cross-switch front tire/wheel assemblies.
- Road test vehicle.
- Does vehicle still lead/pull?
| --
|
Go to Step 5
| System OK
|
5
| Does the vehicle lead/pull in the opposite direction?
| --
|
Go to Step 6
| Go to
Wheel Alignment Measurement
|
6
|
- Cross-switch left front tire/wheel assembly with left rear tire/wheel
assembly.
- Road test the vehicle.
Does vehicle still lead/pull?
| --
|
Go to Step 7
|
Go to Step 8
|
7
|
- Cross-switch right front tire/wheel assembly with right rear tire/wheel
assembly.
- Road test the vehicle.
Does vehicle still lead/pull?
| --
| Go to
Wheel Alignment Specifications
|
Go to Step 9
|
8
| Replace left rear tire.
Is repair complete?
| --
| System OK
| --
|
9
| Replace right rear tire.
Is repair complete?
| --
| System OK
| --
|
