Function

Control Module Function


Control Module Replacement


CAUTION:
Moisture can cause corrosion. Fluids must not come into contact with the connector.


If the control module is damaged, the complete hydraulic unit with integrated control module must be replaced. Observe the following points:
- The control module must be coded for the corresponding type of transmission (manual transmission/Tiptronic).
- The Vehicle Identification Number must be entered.
- A static test and the swap test must be carried out with the PST2.


NOTE: Observe the allocation to the rate-of-turn sensor. The control module with part No. 996.618.149.02 performs a self-test of the rate-of-turn sensor. This control module must be installed only in combination with the rate-of-turn sensor with part No. 996.606.145.00. The allocation is listed in the table below.


PSM control module/hydraulic unit Rate-of-turn sensor

996.618.149.01/996.355.955.51 996.606.147.00 or 996.606.145.00
996.618.149.02/996.355.955.57 996.606.145.00


Rate-of-Turn Sensor


CAUTION:
The rate-of-turn sensor is a micro-mechanical component and is very sensitive to impacts.






Rate-of-turn sensor with part No. 996.606.147.00

If the rate-of-turn sensor with part No.996.606.147.00 is determined to be faulty install the new rate-of-turn sensor with part No.996.606.145.00.






Rate-of-turn sensor with part No. 996.606.145.00


The new rate-of-turn sensor can be retrofitted; the front centre console holder and the lower front centre console support must be replaced for this purpose. An adapter plug is installed between the rate-of-turn sensor and the existing plug.

Rate-of-turn sensor - overview






The table provides an overview of the component changes for the rate-of-turn sensor.


Conversion of rate-of-turn sensor

Rate-of-turn sensor conversion is described under Yaw Rate Sensor - Service and Repair.


Coding


Extract coding

The following items are displayed under this menu item:

Steer.-angle sensor calib. by: xxxxxxx
Version coded by: xxxxxxx


NOTE: The workshop number from the diagnosis card is stored.


Veh. Ident. No. xxxxxxxxxxxxxxx
Transmission: Manual transmission/Tiptronic

Modify coding






Follow the instructions of the diagnostic tester.

The Tester displays the current coding as follows:

Veh. Ident. No. xxxxxxxxxxxxxxx
Transmission: Manual transmission/Tiptronic


Static Test


This test involves carrying out the valve and pump motor test. The test is normally not started until the vehicle moves off. The valve and pump motor test includes actuating all ABS valves and the pump motor and checking their feedback. It only makes sense to carry out the "Static test" function if no fault has previously been detected as present, i.e. the system has not switched off.


NOTE: This test must be carried out after the hydraulic unit has been exchanged.


Swap Test


The swap test is used to check the allocation of the brake pressure lines to the wheel brake cylinders. A hydraulic and an electrical test are carried out.


NOTE: This test must be carried out after the hydraulic unit has been exchanged.


Bleeding


The brake system can be bled using the menu item, "Bleeding brakes".


Steering-Angle Sensor Calibration


The steering-angle sensor can be calibrated with this menu item. The steering-angle sensor must be calibrated after work has been carried out on the running gear in the area of the front axle. The security code is required for calibration of the steering-angle sensor. The security code is contained under menu item "Actual values". See Steering Angle Sensor, Traction Control - Adjustments.