Converting installation position for tilt sensor, additional alarm system M536

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

As from model year 2002, the tilt sensor will be installed under the left front seat next to the alarm control module.
In vehicles up to model year 2001 inclusive, the tilt sensor is located in the radiator tank to the right of the battery.
If a new tilt sensor must be replaced in vehicles produced before model year 2002, the conversion procedure described below must be carried out.
In connection with the parking assistant control module, a new bracket (from model year 2002), a new tilt sensor, a bracket for the tilt sensor and a wiring harness will be required for the conversion.
Disconnect battery. Refer to WORK INSTRUCTIONS AFTER DISCONNECTING THE BATTERY .
Use the wiring diagram for the central locking alarm system.

Remove the battery cover and the right cowl panel cover.

Fig 1: Removing Battery Cover & Right Cowl Panel
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Pull off the plug on the tilt sensor.
Unscrew the fastening nut -arrow- . See Fig 1 .
Remove the tilt sensor and tie the electrical lead with insulating tape.
Fit the battery cover and the right cowl panel cover.
Remove the left front seat. Refer to REMOVING AND INSTALLING FRONT SEAT, - AS OF MY 1996 .
If a control module with parking assistant is installed, remove the bracket. To do so, unscrew the two fastening screws -arrow- and disconnect both plugs. See REMOVING CONTROL MODULE FOR PARKING ASSISTANT .

Fig 2: Removing Control Module Bracket & Screws

Courtesy of PORSCHE OF NORTH AMERICA, INC.

Remove the alarm system control module. See REMOVING CONTROL UNIT FOR ALARM SYSTEM .
Disconnect the plug of the alarm control module, open the plug -A- and pull out the pin strip -B- .

Fig 3: Opening Plug & Pulling Out Pin Strip
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Remove pins 38 and 11 with the press-out tool 90207, insulate the lead and tie it to the wiring harness.

Fig 4: Removing Pins With Press Out Tool
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Push the pin of the grey lead from the service set into the plug for pin 38 until it engages and push the pin of the grey/black lead into the plug for pin 11 until it, too, engages.
Push the pin strip -B- into the plug sleeve -A- and lock the plug.
Lay the red/brown lead -C- from the service wiring harness to the plug (black) of the alarm system control module, crimp the lead to the red/brown lead, pin B8 - wiring diagram, external loads, terminal 30 - and insulate the lead. The leads must be watertight.

Fig 5: Identifying Red/Brown Lead
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Insert the plug for the alarm control module and fit the control module to the floorpan.
Engage the tilt sensor on the tilt sensor bracket.
Insert the service lead plug into the tilt sensor.
Fit the parking assistant control module to the new cover -1- with the fastening screws and insert both plugs into the control module. Pay attention to the new installation position.

Fig 6: Installing Parking Assistant Control Module To New Cover
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Insert the tilt sensor -3- into the cover -1- and screw the cover tight to the floorpan using the fastening screws -arrow- . See Fig 6 .
Lay the lead under the cover, making sure that no electrical lead can be caught when the seat is operated.
Install the seat. Refer to REMOVING AND INSTALLING FRONT SEAT, - AS OF MY 1996 .
Make sure the system is functioning properly with the Porsche System Tester.