Pinpoint Tests

Suspension System

Pinpoint Tests


Pinpoint Test A: Vehicle Drifts/Pulls

This pinpoint test is intended to diagnose the following:
- Unevenly loaded vehicle
- Tire pressure
- Tire forces
- Brake drag
- Incorrect vehicle alignment
- Steering system


PINPOINT TEST A: VEHICLE DRIFTS/PULLS

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A1 CHECK FOR UNEVENLY LOADED VEHICLE


- Visually check the vehicle for an uneven loading condition.
- Is the vehicle unevenly loaded?

Yes
ADVISE the customer of uneven loading condition.

No
GO to A2.

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A2 CHECK THE TIRE PRESSURE


- Check the tire pressures. Refer to the Vehicle Certification (VC) label located on the driver door jamb.
- Is the tire pressure OK?

Yes
GO to A3.

No
ADJUST the tire pressures to the specified pressure.

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A3 ISOLATE TIRE PULL CONDITION


- Cross-rotate the wheel and tire assemblies from front-to-rear. Refer to Wheels and Tires Removal and Replacement.
- Does the vehicle pull/drift?

Yes
GO to A4.

No
The concern has been corrected.

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A4 CHECK FOR BRAKE DRAG


- Spin all 4 wheel and tire assemblies by hand and check for brake drag.
- Does the wheel spin freely?

Yes
GO to A5.

No
REFER to Brake System - General Information Testing and Inspection to diagnose brake drag condition.

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A5 CHECK THE WHEEL ALIGNMENT


- Using alignment equipment and the manufacturer's instructions, check the wheel alignment.
- Is the wheel alignment within specification?

Yes
REFER to Steering System Testing and Inspection to diagnose steering system drift/pull condition.

No
ADJUST the alignment as necessary. REFER to General Procedures.

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