Suspension Control ( Automatic - Electronic ): Testing and Inspection

Air suspension system - calibrate

The air suspension system calibration must be carried out after the following components have been replaced:
- Air suspension ECU
- Height sensor
- Body panels incorporating suspension fixing points.

Check
1. Connect Testbook/T4 to the vehicle and select air suspension calibration.

WARNING: Always wear hand, ear and eye protection when working on the air suspension system.

Adjust
1. Observe the following cautions before calibrating the air suspension system.

CAUTION: The vehicle can be calibrated laden or unladen, but gross vehicle weight must not be exceeded. Tyres must all be the same size and set at the correct pressures.

CAUTION: Ensure the floor used for calibration is level and smooth in all directions to enable calibration to be carried out successfully.

2. Release handbrake and move gearbox selector to 'N' position.
3. Roll vehicle backwards and forwards to relieve stresses in the steering and suspension.
4. Return gearbox selector to 'P' position.
5. Using Testbook/T4 calibrate the air suspension.
6. Models with Xenon headlamps: After calibrating the air suspension, use Testbook/T4 to reset the headlamp levelling ECU and adjust the headlamps.

CAUTION: Failure to adjust the headlamps using Testbook/T4 will result in the incorrect setting of the headlamp alignment.

7. Check/adjust headlamp alignment.
8. Disconnect TestBook/T4 from the vehicle.