Removing Wire Harness In Engine Compartment

Fig 1: Installation Position Of Wire Harness In Engine Compartment

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Fig 2: Connector Overview For Wire Harness In Engine Compartment

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. 1-2 - Airbag sensor connector
2. 3-4 - Fan connectors
3. 5 - Plug connection for front left wire harness
4. 6-7 - Ground strap for front cross member, left and right
5. 8-9 - Plug connections for front right wire harness
6. 10-11 - Bulb holder for direction indicator, left and right
7. 12-13 - Connector for headlight, left and right
8. 14-15 - Transmitter (trigger) for TPM, left and right
9. 16-17 - Connector for angle sensor for headlight levelling system, left and right
10. 18 - Servo valve connector
11. 19 - Additional heating connector
12. 20 - Plug connection for tank for windscreen washer system
13. 21-22 - Plug connection for ABS sensor and brake pad wear indicator, left and right
14. 23 - Circulating pump connector
15. 24-25 - Connector for lateral acceleration sensor
16. 26 - Connector for coolant expansion tank
17. 27-30 - Connector for plenum panel E-box
18. 31 - Rubber sleeve
19. 32 - Ground strap for right firewall
20. 33 - Connector for hydraulic unit
21. 34 - Rubber sleeve
22. 35 - Ground strap
23. 36 - Connector for wiper motor
24. 37 - Air quality sensor connector
25. 38 - Connector for brake fluid reservoir
26. 39 - Brake booster connector
27. 40 - Way-sensor connector (brake assist system)
28. 41 - Pressure sensor connector (brake assist system)
29. 42 - Rubber sleeve

Information 

• The wire harness contains the airbag lines, antenna lines and optical waveguides. 
• If individual lines are damaged, these must be "shut down" (disconnect wires, remove plug-in contacts from plug connections, etc.) and replaced by installing new lines along the original wire harness. 

1. Remove support for DME control unit.
   1. 1.1. Screw off fastening nut -1-  and remove the ground straps together with the twist lock.
      Fig 3: Loosening Ground Straps

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   2. 1.2. Open retaining clips -arrow A-  and remove wire harness for DME control unit -arrow B-  .
      Fig 4: Removing Support For DME Control Unit

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   3. 1.3. Unscrew fastening screw -2-  and the two fastening nuts -3-  and remove support for DME control unit -arrow-  .
2. Remove intake manifold for heating/fresh-air unit.
   1. 2.1. Pull out retaining clips on wire harness at the intake manifold -arrow A-  and unclip wire harness on the intake manifold -arrow B-  .
   2. 2.2. Pull out air inlet grille -arrow C-  .
   3. 2.3. Open retaining clips in the intake manifold -arrow D-  .
   4. 2.4. Screw off fastening nuts -1-  and remove intake manifold -arrow-  .
      Fig 5: Removing Intake Manifold On Heating/Fresh Air Unit

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Remove firewall at the left and right.
   Fig 6: Removing Firewall

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. 3.1. Remove oxygen sensor connectors -1-  from the support at the firewall and disconnect them. → Removing Oxygen Sensor Ahead Of Catalytic Converter → Removing Oxygen Sensor Behind Catalytic Converter
   2. 3.2. Unclip wire harness at the retaining clips -2-  .
   3. 3.3. Loosen PDCC reservoir at the firewall and set it aside.
   4. 3.4. Unscrew fastening screws -3-  on the firewall.
   5. 3.5. Lift the firewall and seal up and off.
4. Release and pull off connector for airbag sensor at the left and right -1 and 2-  . → Removing Airbag Sensor
5. Pull off connectors -3 and 4-  on fan.
   1. 5.1. Unclip wire harness at the retaining clips -arrows A-  .
   2. 5.2. Release connectors on fan -arrows B-  and pull them off -arrows C-  .
   3. 5.3. Screw off fastening nut and pull the ground straps together with the twist lock off the threaded bolt -arrow D-  .
      Fig 7: Pulling Off Connectors On Fan

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
6. Pull off plug connection for front left wire harness -5-  and loosen ground strap for front left cross member -6-  .
   Fig 8: Disconnecting Plug Connection For Front Wire Harness

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. 6.1. Release plug connection for front wire harness on the left cross member at the front -arrow A-  and pull off connector -arrow B-  .
   2. 6.2. Unclip connector socket -arrow C-  .
   3. 6.3. Screw off fastening nut and pull the ground straps together with the twist lock off the threaded bolt -arrow D-  .
7. Loosen ground strap for front right cross member -7-  .
   Fig 9: Loosening Ground Strap For Front Right Cross Member

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. 7.1. Screw off fastening nut on front cross member and remove ground straps together with the twist lock from the threaded bolt -arrow A-  .
   2. 7.2. Unclip wire harness at the retaining clips -arrow B-  .
8. Unclip wire harness at the retaining clips close to the mounting for the left headlight -arrows-  .
   Fig 10: Unclipping Wire Harness Close To Mounting For Left Headlight

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
9. Unclip wire harness at the retaining clips close to the mounting for the right headlight -arrows-  .
   Fig 11: Unclipping Wire Harness Close To Mounting For Right Headlight

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
10. Release connector on TPM transmitter (trigger) -14 and 15-  and pull it off. → Removing Transmitter (Trigger) For Tyre Pressure Monitoring (TPM)
11. Pull off connector on angle sensor for headlight levelling system at the left and right -16 and 17-  .
    Fig 12: Pulling Off Connector On Angle Sensor For Headlight Levelling System

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 11.1. Release connector on angle sensor for headlight levelling system at the left and right -arrows A-  and pull it off -arrow B-  .
    2. 11.2. Remove tie-wrap on the left side for fixing the wire harness in place on the refrigerant line -arrow C-  .
12. Pull off connector on servo valve -18-  .
    Fig 13: Pulling Off Connector On Servo Valve

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 12.1. Release connector on servo valve -arrow A-  and pull it off -arrow B-  .
13. Release connector for additional heating -19-  and pull it off. → Removing Complete Heater
14. Release plug connection on tank for windscreen washer system -20-  and disconnect it. → Removing Reservoir For Windscreen Washer System
15. Pull off plug connection for ABS sensor and brake pad wear indicator at the left and right -21 and 22-  .
    Fig 14: Pulling Off Plug Connection For ABS Sensor And Brake Pad Wear Indicator

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 15.1. Release plug connection for ABS sensor and brake pad wear indicator in the left and right wheel housing -arrow A-  and pull it off -arrow B-  .
    2. 15.2. Unclip connector socket for ABS sensor and brake pad wear indicator -arrow C-  .
    3. 15.3. Unclip wire harness at the three retaining clips on the left and right -arrow D-  .
16. Pull off connector on left lateral acceleration sensor -24-  and circulating pump connector -23-  .
    Fig 15: Pulling Off Connector On Lateral Acceleration Sensor

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 16.1. Release connector on lateral acceleration sensor in the left wheel housing -arrow A-  and pull it off -arrow B-  .
    2. 16.2. Release connector on circulating pump -arrow C-  and pull it off -arrow D-  .
    3. 16.3. Unclip wire harness at the retaining clips -arrows E-  .
17. Pull off connector on right lateral acceleration sensor -25-  .
    Fig 16: Pulling Off Connector On Lateral Acceleration Sensor

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 17.1. Release connector on lateral acceleration sensor in the right wheel housing -arrow A-  and pull it off -arrow B-  .
    2. 17.2. Unclip wire harness at the retaining clips -arrow C-  .
18. Loosen wire harness on upper left side member.
    1. 18.1. Pull wire harness on upper side member down out of the clips -arrows A-  .
    2. 18.2. Unclip wire harness at the retaining clips -arrows B-  .
       Fig 17: Loosening Wire Harness On Upper Left Side Member

       Courtesy of PORSCHE CARS NORTH AMERICA, INC.
19. Loosen wire harness on upper right side member.
    1. 19.1. Pull wire harness on upper side member down out of the clips -arrows A-  .
    2. 19.2. Unclip wire harness at the retaining clips -arrows B-  .
       Fig 18: Loosening Wire Harness On Upper Right Side Member

       Courtesy of PORSCHE CARS NORTH AMERICA, INC.
20. Remove rubber sleeve from the bulkhead -arrow-  .
    Fig 19: Removing Rubber Sleeve From Bulkhead

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
21. Unclip wire harness in plenum panel at the retaining clips -arrows-  .
    Fig 20: Unclipping Wire Harness In Plenum Panel

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
22. Remove rubber sleeve -31- on the left firewall.
    1. 22.1. Remove rubber sleeve on the left firewall in direction of the interior -arrow-  and remove the front left wire harness.
       Fig 21: Removing Rubber Sleeve On Left Firewall

       Courtesy of PORSCHE CARS NORTH AMERICA, INC.
23. Unclip wire harness with the retaining clips on the upper side member -arrow-  .
    Fig 22: Unclipping Wire Harness On Upper Side Member

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
24. Loosen ground strap for right firewall -32-  .
    Fig 23: Loosening Ground Strap

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 24.1. Screw off fastening nut on the right firewall and remove ground strap together with the twist lock from the threaded bolt -arrow-  .
25. Unclip wire harness at the retaining clips -arrow A-  and remove rubber sleeve from the bulkhead -arrow B-  .
    Fig 24: Removing Rubber Sleeve From Bulkhead

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
26. Pull off connector on hydraulic unit -33-  and remove rubber sleeve -34-  .
    Fig 25: Pulling Off Connector On Hydraulic Unit

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 26.1. Release connector on hydraulic unit -arrow A-  and pull it off -arrow B-  .
    2. 26.2. Unclip wire harness at the retaining clips -arrows C-  .
    3. 26.3. Remove rubber sleeve on the right firewall in direction of the interior -arrow D-  and remove front right wire harness.
27. Screw off ground strap -35-  on the centre firewall.
    Fig 26: Removing Ground Strap On Centre Firewall

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 27.1. Screw off the fastening nut on the centre firewall and remove the ground strap with the twist lock -arrow A-  .
    2. 27.2. Unclip wire harness at the retaining clips -arrow B-  .
28. Pull off connector on brake fluid reservoir -38-  .
    Fig 27: Pulling Off Connector On Brake Fluid Reservoir

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 28.1. Release connector on brake fluid reservoir -arrow A-  and pull it off -arrow B-  .
29. Pull off connector on brake booster -39-  .
    Fig 28: Pulling Off Connector On Brake Booster

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 29.1. Release connector on brake booster using a suitable aid (e.g. angled piece of wire) -a-  (-arrow A-  ) and pull it off -arrow B-  .
30. Pull off way-sensor connector (brake assist system) -40-  .
    Fig 29: Pulling Off Way-Sensor Connector (Brake Assist System)

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 30.1. Release way-sensor connector (brake assist system) using a suitable aid (e.g. angled piece of wire) -a-  (-arrow A-  ) and pull it off -arrow B-  .
31. Pull off pressure sensor connector (brake assist system) -41-  .
    Fig 30: Pulling Off Pressure Sensor Connector (Brake Assist System)

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 31.1. Release pressure sensor connector (brake assist system) using a suitable aid (e.g. angled piece of wire) -a-  (-arrow A-  ) and pull it off -arrow B-  .
32. Loosen wire harness on the centre firewall.
    1. 32.1. Open retaining clips -arrows A-  and remove the line -arrow B-  .
    2. 32.2. Open both supports (brake assist system) -arrows C-  and remove wire harness -arrow D-  .
       Fig 31: Removing Wire Harness On Centre Firewall

       Courtesy of PORSCHE CARS NORTH AMERICA, INC.
33. Remove rubber sleeve -42-  on the centre firewall.
    Fig 32: Removing Rubber Sleeve On Centre Firewall

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 33.1. Unclip wire harness from the centre firewall at the retaining clips -arrow A-  .
    2. 33.2. Remove rubber sleeve on the centre firewall in direction of the interior -arrow B-  and remove wire harness.
34. Remove main wire harness - dashboard area and centre console. → Removing Main Wiring Harness