Removing Wire Harness For Brake Booster

WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Installation Position Of Wire Harness For Brake Booster

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Ground strap
Connector for wiper motor
Air quality sensor connector
Connector for brake fluid reservoir
Brake booster connector
Way-sensor connector (brake assist system)
Pressure sensor connector (brake assist system)
Rubber sleeve

Remove cover from cable duct.

Fig 2: Removing Cover From Cable Duct
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Information

When cutting the wire harness for the brake booster, make sure there is enough length of cable left to join to the new lines.
Cut off wire harness for brake booster in area -a- .

Fig 3: Identifying Cut Off Wire Harness For Brake Booster And Expose
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove fabric tape and tie-wrap in area -b- and expose the remaining lines.
Unscrew ground strap -1- to the centre firewall.

Fig 4: Loosening Ground Strap At Centre Firewall
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 4.1. Unscrew fastening nut on the centre firewall and remove the ground strap with the twist lock -arrow A- .
2. 4.2. Unclip wire harness for brake booster on retaining clip -arrow B- .
Pull off connector on reservoir for brake fluid -4- .

Fig 5: Pulling Off Connector On Reservoir For Brake Fluid
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1. 5.1. Release connector on reservoir for brake fluid -arrow A- and pull off -arrow B- .
Pull off connector on brake booster -5- .

Fig 6: Pulling Off Connector On Brake Booster
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 6.1. Release connector on brake booster with suitable auxiliary materials (e.g. angled piece of wire) -a- -arrow A- and pull off -arrow B- .
Pull off connector on way-sensor (brake assist system) -6- .

Fig 7: Pulling Off Connector On Way-Sensor (Brake Assist System)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 7.1. Release connector on way-sensor (brake assist system) with suitable auxiliary materials (e.g. angled piece of wire) -a- -arrow A- and pull off -arrow B- .
Pull off pressure sensor connector (brake assist system) -7- .

Fig 8: Pulling Off Connector On Pressure Sensor (Brake Assist System)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 8.1. Release connector on pressure sensor (brake assist system) using suitable auxiliary materials (e.g., an angled piece of wire) -a- -arrow A- and pull it off -arrow B- .
Open the retaining clip -arrows A- and take out the line -arrow B- .

Fig 9: Loosening Wire Harness For Brake Booster
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Open both supports (brake assist system) -arrows C- and take out the wire harness for the brake booster -arrow D- .
Remove rubber sleeve -8- on the centre firewall.

Fig 10: Removing Rubber Sleeve On Centre Firewall
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 11.1. Unclip the wire harness for brake booster on retaining clip from the centre firewall -arrow A- .
2. 11.2. Remove rubber sleeve on the centre firewall in direction of the engine compartment -arrow B- and take out wire harness for brake booster.