Suspension Control Module: Service and Repair

Removing and installing PASM control unit





Removing PASM control unit

Information:
If the control unit has to be replaced, read out the values saved in the control unit before starting the removal.





Installation position shown on the 911

1. Pull carpet on right-hand side to the side.





Unscrewing cover for passenger's footwell

2. Unscrew the two fastening nuts -1- and remove the cover -2-.
3. Unclip control unit from the support and pull it out and down.





Disconnecting control unit

4. Release -A- and pull off electric connector.

Installing PASM control unit

1. Connect the electric plug connection until the plug clicks into place.





Connecting the plug connection

2. Push in control unit into the support and clip it in.
3. Fit cover -2- and secure with the two fastening nuts -1-.





Screwing on cover for passenger's footwell

4. Stick on carpet at side again onto cover.

Programming PASM control unit

Reading out and writing values for PASM control unit

Information:
^ During coding, there should be a guaranteed power supply for the PIWIS tester 9718. It is essential to connect a battery charger with a current rating of at least 40 A to the vehicle battery.
^ The PIWIS tester 9718 instructions take precedence and in the event of a discrepancy these are the instructions that must be followed. Deviations may occur with later software versions.
^ The procedure described here has been structured in general terms; different text or additions may appear in the PIWIS tester 9718.

1. Connect the PIWIS tester 9718 to the vehicle and start it. Switch on the ignition. >> Continue.
2. Select the vehicle type.
3. Using the >> key, move from the vehicle type to the list of control units.
4. Select PASM and press >>.
5. In the PASM menu, select Control unit replacement and press >>.
6. Select Read codes and press >>.
7. On the screen of the PIWIS tester appears the message Coding read-out complete >>.
8. Switch off ignition and replace control unit.
9. Switch to the Special functions menu and perform the vehicle handover using the F8 key.
10. In the Special functions menu, erase All fault memories by pressing >>.
11. Switch on ignition. Once the control unit has been replaced, the vehicle data is uploaded under the Write in data menu. Press >>.
12. PIWIS tester displays Coding write-in complete >>.
13. Carry out a test drive and read out fault memory.