Audi Q5: All Wheel Drive Clutch Valve -N445- or All Wheel Drive Clutch Valve 2 -N446-, Removing and Installing
All Wheel Drive Clutch Valve -N445- or All Wheel Drive Clutch Valve 2 -N446-, Removing and Installing, 0BE, 0BF
Special tools and workshop equipment required
- Hex Socket - 4mm -T10370-
Note
- Pay attention to the general repair information. Refer to → Chapter "Repair Information".
- Pay attention to the safety precautions. Refer to → Chapter "Safety Precautions".
Caution
Malfunctions on the rear final drive.
Do not confuse the All Wheel Drive Clutch Valve -N445- component location with the All Wheel Drive Clutch Valve 2 -N446- component location.
Removing
- The ignition is off.
- Place the vehicle on a lift.
- Lower the back section of the exhaust system just a little and secure it.
- Remove the wiring harness bracket from the rear final drive.
Note
- Mark the connectors -1 through 4- for the Oil Pressure/Temperature Sensor and for the Clutch Valves.
- Disconnect the connectors -1 and 2-.
- Disconnect the connector -3- from the All Wheel Drive Clutch Valve 2 -N446- and the connector -4- from the All Wheel Drive Clutch Valve -N445-.
- Place the Drip Tray under the rear final drive.
- Remove the bolts -1- from each of the Clutch Valves using the Hex Socket - 4mm -T10370-.
- Carefully pry out the Clutch Valve with a flat blade screwdriver -3-. Be careful of the pressure spring when doing this. The pressure spring could fall out of the opening in the hydraulic control unit -6-.
-A- = All Wheel Drive Clutch Valve 2 -N446- identification color brown
-B- = All Wheel Drive Clutch Valve -N445- identification color black
Installing
- The ball -5-, the guide -4- (the smaller diameter faces the spring) and the spring -3- must be installed in the housing opening -6- for the Clutch Valve-2-.
- Coat the O-rings with ATF and install the new Clutch Valve with the new O-rings -arrows-.
- Tighten the bolts -1- evenly until stop by hand. Then tighten to the tightening specification -item 13-.
Further installation is performed in reverse order of the removal. Note the following.
Note
- Allocation for the Oil Pressure/Temperature Sensor and Clutch Valves connectors:
- -1- = Oil Pressure/Temperature Sensor 2 -G640- Connector
- -2- = Oil Pressure/Temperature Sensor -G437- Connector
- -3- = All Wheel Drive Clutch Valve 2 -N446- Connector
- -4- = All Wheel Drive Clutch Valve -N445- Connector
- Attach the wiring harness bracket to the rear final drive.
- Fill the ATF in the rear final drive. Refer to → Chapter "ATF, Filling, 0BE, 0BF".
- Install the rear section of the exhaust system on the body and align it so it is free of tension. Refer to → Rep. Gr.26; Exhaust Pipes/Mufflers; Overview - Muffler.
Torque Displacement, Checking
Torque Development, Checking, 0BE, 0BF
Special tools and workshop equipment required
- Vehicle Diagnostic Tester
Procedure:
Note
- Pay attention to the general repair information. Refer to → Chapter "Repair Information".
- Pay attention to the safety precautions. Refer to → Chapter "Safety Precautions".
After the following work the function 22- Checking the torque displacement must be performed:
- Working on the rear final drive wiring
- Working on the valves: All Wheel Drive Clutch Valve -N445- and All Wheel Drive Clutch Valve 2 -N446-.
- Working on the hydraulic control unit
- Lift the vehicle on a hoist just far enough until the wheels are no longer touching the floor.
- Connect the Vehicle Diagnostic Tester and turn on the ignition.
- Select the function 22 - Rear Final Drive Replacing in the vehicle diagnostic tester under Guided Functions in the directory 22- Torque Development, Checking.
- Follow all the instructions given by the Vehicle Diagnostic Tester exactly.
Use the Vehicle Diagnostic Tester to check if the torque is stored for the correct side when the rear final drive is activated.
