Sub-Part - Removing Wire Harness In Engine Compartment At The Front Left

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 Sub-Part - Wire Harness In Front Left Of Engine Compartment

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1 - Airbag sensor connector
2-3 - Fan connectors
4 - Plug connection for front left wire harness
5 - Ground strap for front left cross member
6 - Bulb socket for left direction indicator
7 - Connector for left headlight
8 - Transmitter (trigger) for TPM, left
9 - Connector for angle sensor for range adjustment
10 - Servo valve connector
11 - Additional heating connector
12 - Plug connection for ABS sensor and brake pad wear indicator, left
13 - Circulating pump connector
14 - Connector for lateral acceleration sensor
15-18 - Connector for plenum panel E-box
19 - Rubber sleeve

Remove cover on cable duct (above the pedals) -arrow- .

Fig 2: Removing Cable Duct Cover
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Information

When cutting the front wire harness, make sure there is enough length of cable left to join to the new lines.
Cut off front left wire harness in areas -a- (top left, next to the pedals).

Fig 3: Cutting Off And Exposing Front Left Wire Harness
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Remove fabric tape and tie-wraps in area -b- and expose the remaining lines.
Remove left firewall.

Fig 4: Removing Firewall
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1. 4.1. Remove oxygen sensor connector -1- from the support at the firewall and disconnect it. → Removing Oxygen Sensor Ahead Of Catalytic Converter → Removing Oxygen Sensor Behind Catalytic Converter
2. 4.2. Unclip wire harness at the retaining clip -2- .
3. 4.3. Loosen PDCC reservoir at the firewall and set it aside.
4. 4.4. Unscrew fastening screws -3- on the firewall.
5. 4.5. Lift the firewall and seal up and off.
Release connector on airbag sensor at the left -1- and pull it off. → Removing Airbag Sensor
Pull off connectors -2 and 3- on fan.
1. 6.1. Unclip wire harness at the retaining clips -arrows A- .
2. 6.2. Release connectors on fan -arrows B- and pull them off -arrows C- .
3. 6.3. Screw off fastening nut and pull the ground straps together with the twist lock off the threaded bolt -arrow D- .
  
  Fig 5: Pulling Off Fan Connectors
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Pull off plug connection for front left wire harness -4- and loosen ground strap for front left cross member -5- .

Fig 6: Disconnecting Plug Connection For Front Wire Harness
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1. 7.1. Release plug connection for front wire harness on the front left cross member -arrow A- and pull off connector -arrow B- .
2. 7.2. Unclip connector socket -arrow C- .
3. 7.3. Screw off fastening nut and pull the ground straps together with the twist lock off the threaded bolt -arrow D- .
Unclip wire harness at the retaining clips close to the mounting for the left headlight -arrows- .

Fig 7: Unclipping Wire Harness Close To Mounting For Left Headlight
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Release connector on TPM transmitter (trigger) -8- and pull it off. → Removing Transmitter (Trigger) For Tyre Pressure Monitoring (TPM)
Pull off connector on angle sensor for range adjustment at the left -9- .

Fig 8: Pulling Off Connector On Angle Sensor For Range Adjustment
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1. 10.1. Release connector on angle sensor for range adjustment at the left -arrows A- and pull it off -arrow B- .
2. 10.2. Remove tie-wrap used to fix the wire harness in place on the refrigerant line -arrow C- .
Pull off connector on servo valve -10- .

Fig 9: Pulling Off Connector On Servo Valve
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1. 11.1. Release connector on servo valve -arrow A- and pull it off -arrow B- .
Release connector for additional heating -11- and pull it off. → Removing Complete Heater
Pull off plug connection for ABS sensor and brake pad wear indicator on the left -12- .

Fig 10: Pulling Off Plug Connection For ABS Sensor And Brake Pad Wear Indicator
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1. 13.1. Release plug connection for ABS sensor and brake pad wear indicator in the left wheel housing -arrow A- and pull it off -arrow B- .
2. 13.2. Unclip connector socket for ABS sensor and brake pad wear indicator -arrow C- .
3. 13.3. Unclip wire harness at the three retaining clips -arrow D- .
Pull off connector on left lateral acceleration sensor -14- and circulating pump connector -13- .

Fig 11: Pulling Off Connector On Lateral Acceleration Sensor
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1. 14.1. Release connector on lateral acceleration sensor in the left wheel housing -arrow A- and pull it off -arrow B- .
2. 14.2. Release connector on circulating pump -arrow C- and pull it off -arrow D- .
3. 14.3. Unclip wire harness at the retaining clips -arrows E- .
Loosen wire harness on upper left side member.
1. 15.1. Pull wire harness on upper side member down out of the clips -arrows A- .
2. 15.2. Unclip wire harness at the retaining clips -arrows B- .
  
  Fig 12: Loosening Wire Harness On Upper Left Side Member
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove rubber sleeve from the bulkhead -arrow- .

Fig 13: Removing Rubber Sleeve From Bulkhead
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Unclip wire harness in plenum panel at the retaining clips -arrows- .

Fig 14: Unclipping Wire Harness In Plenum Panel
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Remove rubber sleeve -19- on the left firewall.
1. 18.1. Remove rubber sleeve on the left firewall in direction of the engine compartment -arrow- and remove the front left wire harness.
  
  Fig 15: Removing Rubber Sleeve On Left Firewall
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.