Calibration
Calibration must be carried out if control unit and/or self-levelling sensors are replaced. When doing this, the self-levelling sensors are calibrated by determining a correction value (corresponding to the actual height of vehicle) and permanently storing it in the control unit.
Notes on calibration
Note. Prior to calibration, the normal level must be adjusted! --> Conditions for carrying out calibration . Ensure that tire pressures have been adjusted to the respective tire specifications. Refer to 44 IN TIRES - AS OF MY 2003 (ALL MODELS) . During calibration, the vehicle is raised and lowered! When engine is running, switch air extraction system on. The security code is displayed in the Porsche System Tester under menu >> Level adjustment >> Actual values.
The nominal values for the nominal heights of the level sensors are stored in the control unit. The actual values of the respective axle heights, front left, front right, rear left, rear right, have to be measured manually and then entered with the Porsche System Tester. The actual values are to be measured on the two axle supports (front axle, rear axle), both on the right and left. --> Conditions for carrying out calibration .
Scheme 5
The distance (middle of wheel) between the road (wheel contact area on measuring platform) and the measuring point -A- on the axle support is measured. (Scheme 5)
Scheme 6
The distance (middle of wheel) between the road (wheel contact area on measuring platform) and the measuring point -A- on the axle support is measured. (Scheme 6)
Conditions for carrying out calibration
Calibration can only be carried out while vehicle is stationary.
The vehicle must be on the measuring platform.
The foot-operated parking brake is to be operated.
The car is to be adjusted to normal level. --> Conditions for carrying out calibration and ( Adjusting car to normal level ).
If air suspension accumulators of the air suspension are filled, only the ignition has to be switched on. If air pressure in accumulators is too low, compressor comes on and loads battery. In this case, a constanter (charging unit) must be connected or the engine must be started.
Connect the Porsche System Tester. Select the test step Calibration in the Air suspension/level adjustment system.
When calibrating, the vehicle moves down first and then moves up to normal level.
After normal level has been reached, determine the actual values of axle heights at measuring points.
If an implausible value is entered (actual value is not accepted), measure height again and enter value.
Calibrating control unit for level adjustment
Information, measuring points, procedure, and conditions for calibration: --> 43 K2 Calibration - as of MY 2003 (All Models Except Cayenne S TIO Titan) .
1. Connect the Porsche System Tester to the vehicle and start the System Tester. Switch on ignition.
2. Select vehicle type using the cursor keys.
3. Select "Level adjustment" using the cursor keys.
4. Select the menu "Teach" and perform the calibration function.
5. Read out fault memory. If fault is present, proceed in accordance with Level adjustment diagnosis.
Scheme 7
Note. In running gear with level adjustment, a self-levelling sensor is installed on each spring strut. Removal and installation is described for the right spring strut. The self-levelling sensor is screwed to the suspension subframe and upper control arm.
1. Counter with an open-ended wrench on the two flats -1- and unscrew the fastening nuts. see scheme 13
2. Unscrew both fastening screws -2-. see scheme 13
Scheme 8
3. Press the electric connector together -a- and pull it off. (Scheme 7)
Scheme 9
Note. In running gear with level adjustment, a self-levelling sensor is installed on each spring strut. Removal and installation is described for the right spring strut. The self-levelling sensor is screwed to the suspension subframe and upper control arm.
1. Press the electric connector onto the self-levelling sensor until it clicks into place.
Scheme 10
2. Tighten fastening screws -3- --> 43 TW Tightening torques - as of MY 2003 (Cayenne TIP, Cayenne MAN, Cayenne S TIP, Cayenne S MAN, Cayenne Turbo). (Scheme 9)
3. Engage lever of self-levelling sensor and position the sensor.
4. Position the fastening nut -2-, counter with an open-ended wrench on the two flats -1- and tighten the nut --> 43 TW Tightening torques - as of MY 2003 (Cayenne TIP, Cayenne MAN, Cayenne S TIP, Cayenne S MAN, Cayenne Turbo). (Scheme 9)
If a new self-levelling sensor is installed, then the control unit for level adjustment must be calibrated.
Information, measuring points, procedure, and conditions for calibration: --> 43 K2 Calibration - as of MY 2003 (All Models Except Cayenne S TIO Titan) .
1. Connect the Porsche System Tester to the vehicle and start the System Tester. Switch on ignition.
2. Select vehicle type using the cursor keys.
3. Select "Level adjustment" using the cursor keys.
4. Select the menu "Teach" and perform the calibration function.
5. Read out fault memory. If fault is present, proceed in accordance with Level adjustment diagnosis.