Specifications & Procedures: Adjustments Porsche Cayenne I

WHEEL ALIGNMENT PRELIMINARY CONDITIONS

In order to prevent erroneous wheel alignment measurements, the following conditions must be met BEFORE starting wheel alignment

1. Wheel alignment equipment properly calibrated.
2. Wheel alignment platform with plates at the rear axle that can be rotated are advisable.
3. Fuel tank must be full.
4. Spare tire and tool kit installed.
5. No passengers and without additional weight in vehicle.
6. Tires must be set to correct pressure.
7. If vehicle is equipped with air suspension, it must be adjusted to normal level. See «ADJUSTING CAR TO NORMAL LEVEL (AIR SUSPENSION)»(ref-161370-S42482400942004040700000) under DISABLING/ENABLING ELECTRONIC LEVEL CONTROL.

WHEEL ALIGNMENT WORK SEQUENCE

1. Ensure vehicle is prepared for alignment. See «WHEEL ALIGNMENT PRELIMINARY CONDITIONS»(ref-161370-S31635853742004040700000) .
2. Check and adjust the wheel alignment at the REAR axle first. Camber values at the front axle apply for the straight-ahead position of the wheels. Steering wheel and steering gear must be in straight-ahead position when toe is being adjusted.
3. BEFORE wheel alignment values are adjusted at the front and rear axles, it is recommended that the vehicle height be checked at the empty weight. Conclusions can then be drawn about wheel alignment values in the event of any suspension alignment that becomes necessary later.

INITIALIZING & CALIBRATING STEERING ANGLE SENSOR

Calibrating The Steering Angle Sensor

The steering angle sensor is part of the Porsche Stability Management (PSM) system. The steering angle sensor is integrated into the steering column switch assembly (combination switch).

The steering angle sensor must be calibrated using the Porsche System Tester (factory scan tool) under these conditions

1. Turn ignition on, with engine off.
2. Running gear set according to Porsche specifications.
3. Wheels in straight ahead position, and steering wheel horizontal.
4. In straight-ahead position, steering wheel may be turned by +/-2 degrees from horizontal position (steering center position).
5. After successful calibration, stored fault code is erased from the fault memory. PSM indicator light in the instrument cluster will go out.

WHEEL ALIGNMENT PROCEDURES

Camber Adjustment (Rear Axle)

Before checking, see WHEEL ALIGNMENT PRELIMINARY CONDITIONS and WHEEL ALIGNMENT WORK SEQUENCE .

1. Compress vehicle at front and rear by about 0.984" (25 mm), 2-3 times and allow it to spring back freely.
2. Measure rear camber. If camber needs adjustment, loosen camber eccentric nut (A). (Scheme 1) Camber is adjusted by turning camber eccentric (A). (Scheme 2)
3. Tighten eccentric nut to specification. See «TORQUE SPECIFICATIONS»(ref-161370-S09566516982004040700000). If camber needed adjustment, recalibrate steering angle sensor. See «INITIALIZING & CALIBRATING STEERING ANGLE SENSOR»(ref-161370-S31070318432004040800000).

Scheme 1

Scheme 2

Toe-In Adjustment (Rear)

1. Before checking, see «WHEEL ALIGNMENT PRELIMINARY CONDITIONS»(ref-161370-S31635853742004040700000) and «WHEEL ALIGNMENT WORK SEQUENCE»(ref-161370-S37674834302004040700000).
2. Measure rear toe-in. If toe-in needs adjustment, loosen rear toe eccentric nut. (Scheme 1)
3. After loosening nut, turn toe eccentric to adjust rear toe-in. (Scheme 2)
4. Tighten eccentric nut to specification. See «TORQUE SPECIFICATIONS»(ref-161370-S09566516982004040700000). If rear toe-in needed adjustment, recalibrate steering angle sensor. See «INITIALIZING & CALIBRATING STEERING ANGLE SENSOR»(ref-161370-S31070318432004040800000).

Scheme 3

1. Before checking, see «WHEEL ALIGNMENT PRELIMINARY CONDITIONS»(ref-161370-S31635853742004040700000) and «WHEEL ALIGNMENT WORK SEQUENCE»(ref-161370-S37674834302004040700000).
2. Measure front camber. If camber needs adjustment, loosen camber eccentric nut. (Scheme 3) Camber is adjusted by turning camber eccentric (A).
3. Tighten eccentric nut to specification. See «TORQUE SPECIFICATIONS»(ref-161370-S09566516982004040700000). If camber needed adjustment, recalibrate steering angle sensor. See «INITIALIZING & CALIBRATING STEERING ANGLE SENSOR»(ref-161370-S31070318432004040800000).

Caster Adjustment (Front Axle)

1. Before checking, see «WHEEL ALIGNMENT PRELIMINARY CONDITIONS»(ref-161370-S31635853742004040700000) and «WHEEL ALIGNMENT WORK SEQUENCE»(ref-161370-S37674834302004040700000).
2. Measure front caster. If caster needs adjustment, loosen caster eccentric nut. (Scheme 3) Caster is adjusted by turning caster eccentric (B).
3. Tighten eccentric nut to specification. See «TORQUE SPECIFICATIONS»(ref-161370-S09566516982004040700000).

Scheme 4

Scheme 5

1. Before checking, see «WHEEL ALIGNMENT PRELIMINARY CONDITIONS»(ref-161370-S31635853742004040700000) and «WHEEL ALIGNMENT WORK SEQUENCE»(ref-161370-S37674834302004040700000).
2. Measure front toe-in. If toe-in needs adjustment, go to next step.
3. Center steering wheel by turning wheels to straight-ahead position.
4. Remove cover for underbody (transmission protection). Remove heat insulation panel from steering gear. (Scheme 4)
5. Mark steering gear center position. The marking for the steering center position is under the heat insulation panel at the front in the direction of travel, on steering gear housing. (Scheme 5)
6. Clamp steering wheel in center position with steering wheel holder.
7. Measure front toe-in. If necessary, adjust front toe-in at the tie rod end ball joint (B). Loosen lock nut to adjust. (Scheme 3)
8. Tighten lock nut to specification. See «TORQUE SPECIFICATIONS»(ref-161370-S09566516982004040700000).
9. With steering gear still in center position, check steering wheel alignment. If necessary, reposition steering wheel to center position. See «STEERING WHEEL»(ref-161370-S21687231552004040800000) in REMOVAL & INSTALLATION.
10. If front toe-in needed adjustment, recalibrate steering angle sensor. See «INITIALIZING & CALIBRATING STEERING ANGLE SENSOR»(ref-161370-S31070318432004040800000).