Suspension Codes, Checking Requirements

Suspension Codes, Checking Requirements
Information on weight codes (code number)
From m.y. 1998 >, spring/shock assemblies will be classified according to weight codes (code number) so that suspension components can be matched easily.

The spring/shock assembly installed in the vehicle is indicated by the weight code on the vehicle data label.

Specified values for wheel alignment
1BA refer to Alignment, Specifications for Standard suspension
1BC refer to Alignment, Specifications for Special purpose suspension.
Special purpose vehicles suspension -1BC- have the same specified values for wheel alignment as the standard suspension -1BA-.





Example of vehicle data label
In this example the vehicle is installed with the standard suspension, version 1BA (arrow).
The vehicle data label is located in the spare wheel recess and in the vehicle Maintenance booklet.
Factory codes for the suspension:
- 1BA: Standard suspension
- 1BE: Sport suspension
- 1BB: Heavy duty suspension (approx. 20 mm (3/4 inch) higher)
- 1BC: Special purpose suspension
- 1BD: Sport suspension, Audi S4
- 1BH: USA
- 1BT: Heavy duty suspension (approx. 7 mm or 1/4 inch higher)
- 1BP: Heavy duty suspension (same ride height as 1BA but with limited bump)

Requirements
- Test equipment must be properly adjusted and attached to vehicle (refer to equipment manufacturer's instructions)
- Equal tread depth for both tires on each axle, with difference between two not more than 2 mm (0.079 inch)
- Tires inflated to correct pressure
- Sliding plates and turntables not positioned against any stop when checking wheel alignment
- Vehicle at correct curb weight 1)
- Vehicle accurately positioned, suspension bounced and rocked several times and allowed to settle
- Suspension, steering and steering linkage in proper condition with no damage or excessive play
- Carry out axial wheel run-out compensation. Since some wheel run-out is allowable, checking alignment without first compensating for axial wheel run out may indicate that the toe-in tolerance is already exceeded. If this is the case it is not possible to set toe-in without first compensating for wheel run-out

1) Curb weight is defined as: the weight of the vehicle ready for the road (fuel tank completely full, spare wheel, vehicle tool kit and vehicle jack all in specified positions).

Part (1 Of 2):

Part (2 Of 2):

1) Only affects vehicles with all wheel drive

Wheel alignment must be checked if:
- There are problems with vehicle performance.
- There is accident damage.
- Tires are worn on one side.
- Axle components in tables have been removed.