Pinpoint Tests

Diagnostic Routine A

Diagnostic Overview

Vehicle Drifts, Pulls

This pinpoint test is intended to diagnose the following:

- Unevenly loaded vehicle

- Tire pressure

- Tire forces

- Brake drag

- Incorrect vehicle alignment

- Bent/damaged vehicle components

- Steering system

Pinpoint Test

1. CHECK FOR UNEVENLY LOADED VEHICLE

1. Visually check the vehicle for an uneven loading condition.

Is the vehicle unevenly loaded?






2. CHECK THE TIRE PRESSURES AND TIRE CONDITIONS

1. Check the tire pressures. REFER to Vehicle Certification (VC) Codes . Check the tires for uneven/abnormal wear. REFER to Symptom Chart: Tire Wear Symptom Related Diagnostic Procedures.

Are the tire pressures and tire conditions OK?






3. ISOLATE TIRE DRIFT/PULL CONDITION

1. Cross the front wheel and tire assemblies from left-to-right.

Does the vehicle drift/pull?






4. CHECK FOR BRAKE DRAG

1. Spin all four wheel and tire assemblies by hand and check for brake drag.

Do the wheels spin freely?






5. CHECK THE WHEEL ALIGNMENT

1. Using alignment equipment and the manufacturer's instructions, check the wheel alignment.

Is the wheel alignment out of specification?