Valve Body: Service and Repair
Valve Body
Special tools, testers and auxiliary items required
• Torque Wrench (5-50 Nm) (V.A.G 1331)
• Torque Wrench (V.A.G 1756)
Removing
- Turn off the ignition and disconnect the battery ground cable.
- Remove the transmission fluid filter. Refer to => [ Transmission Fluid Filter ] Service and Repair.
- Make a sketch, identical to the illustration, of all the sensors and solenoid valves and their connectors.
- Mark the solenoid valves and/or sensors and their connector before disconnecting them.
It is absolutely required to draw or take pictures and to make identifying marks so that the connectors for the solenoid valves cannot be interchanged unintentionally when reinstalling the sensors and valve body.
Confusing the connectors could cause damage to the transmission.
- Carefully pry out the connector tabs on the solenoid valves - 1 through 8 - using a small screwdriver and then disconnect the connectors.
The wiring harness or the valve body with the solenoid valves must be replaced if the one of the connectors gets damaged.
- Disconnect the connectors - A and B -.
• Disconnect the connectors for the automatic transmission hydraulic pressure sensor 1 and the automatic transmission hydraulic pressure sensor 2, refer to => [ Automatic Transmission Hydraulic Pressure Sensor 1 and Automatic Transmission Hydraulic Pressure Sensor 2 ] Electrical and Electronic Components and Locations.
- Remove the bracket for the connectors - 1 and 2 -.
- Remove the transmission fluid temperature sensor - 3 - from the valve body.
- Disengage the wiring harnesses from the brackets - arrows -.
- If equipped, bend back the locking plate on the selector lever - arrows -.
- Remove the selector lever - 1 - from the selector shaft.
- When doing this, hold the selector lever - 1 - secure with pliers - 2 - so that it does not turn when removing the multifunction transmission range switch.
- Make sure the slide - 3 - on the valve body in which the shift lever engages is not damaged.
The valve is very "sensitive". Even minor damage leads to a malfunction.
- Always slide the valve into the body, secure it against falling out and never exchange it.
The valve body bolts on the transmission housing have different lengths and must be replaced.
Only the indicated bolts - arrows - may be loosened.
When loosening the other bolts, the function of the valve body can be influenced or the valve body splits up.
- Remove the brackets - 1 and 2 -.
- Loosen the valve body bolts - arrows -, - arrows A and B - in a diagonal sequence and then carefully remove the valve body.
- 3 - Valve body description, for example, A2
- When removing the valve body, it may be necessary to protect the piston - 2 - against falling out or remove it with the spring.
Installing
- Observe correct routing of the wires so that they do not get pinched when installing the valve body.
- Route the wiring harness - 5 - into the transmission as illustrated.
The distance - a - must be maintained so that the wiring harness - 5 - does not touch the planetary gear and get damaged when the vehicle is being driven.
- The wiring harnesses - 1, 3, 4 and 5 - lay over the edge of the transmission as illustrated.
- Attach the wiring harnesses to the transmission with tape.
- Coat the piston - 2 - with Automatic Transmission Fluid (ATF) and then install it with the spring into the transmission housing, as illustrated.
- Mount the valve body and install the 2 bolts hand tight.
• The wiring harnesses - 1, 3, 4 and 5 - must not get caught by the valve body.
Bolt Lengths and Locations for the Valve Body
- Install the remaining new bolts and the brackets - 1 and 2 - and tighten hand tight.
• If the wires are too short to connect to the sensors or to be attached to the valve body, then they were routed incorrectly or they are caught by the valve body. The valve body must be removed again and the wires must be routed correctly.
• Replace the valve body bolts.
- Tighten the valve body bolts working from the inside toward the outside diagonally; tightening specification. Refer to => [ Fastener Tightening Specifications ] Fastener Tightening Specifications.
- Install the transmission fluid temperature sensor. For the tightening specification, refer to => [ Fastener Tightening Specifications ] Fastener Tightening Specifications.
- Connect the 8 pin connector according to the marks made on the solenoid valves. Refer to => [ Wire Routing, Connectors and Bracket on Valve Body ] Wire Routing, Connectors and Bracket on Valve Body.
Confusing the connectors could cause damage to the transmission.
The wiring harness or the valve body with the solenoid valves must be replaced if the one of the connectors gets damaged.
- Connect the bracket for the connectors, refer to => [ Brackets for Connectors, Securing the Wires ] Wire Routing, Connectors and Bracket on Valve Body, tightening specifications, refer to => [ Fastener Tightening Specifications ] Fastener Tightening Specifications.
- Connect the connectors, - items A and B - in the => [ Wire Routing, Connectors and Bracket on Valve Body ] Wire Routing, Connectors and Bracket on Valve Body.
- Connect the connectors to the automatic transmission hydraulic pressure sensor 1 and the automatic transmission hydraulic pressure sensor 2. Refer to => [ Automatic Transmission Hydraulic Pressure Sensor 1 and Automatic Transmission Hydraulic Pressure Sensor 2 ] Electrical and Electronic Components and Locations.
- Engage the wiring harness - 3 - in the bracket - 7 - - arrow B -.
- Attach the selector lever - 2 - to the selector shaft - 6 -.
When doing this, make sure the pin on the selector lever - 2 - engages into the slider - 1 - - arrow A -. Position the slider if necessary.
- Install the washer - 5 - and nut - 4 - on the selector shaft - 6 -.
The collar on the nut must always face the washer and fit into the washer when the nut is tightened.
The wiring harness must be routed underneath the selector shaft lever.
- Tighten the nut on the selector lever - 1 -. For the correct tightening specification, refer to => [ Fastener Tightening Specifications ] Fastener Tightening Specifications.
- When doing this, hold the selector lever - 1 - secure with pliers - 2 - so that it does not turn when installing the multifunction transmission range switch.
- Make sure the slide - 3 - on the valve body in which the shift lever engages is not damaged.
- Bend up the locking plate at the nuts - arrows -, if equipped.
- Install the transmission fluid filter. Refer to => [ Transmission Fluid Filter ] Service and Repair.
- Turn off the ignition and disconnect the battery ground cable.
- Fill the ATF and check the level. Refer to => [ ATF Level, Checking and Filling ] Testing and Inspection.
- Connect the vehicle diagnostic tester and select "function/component selection".
- Then press "Powertrain (Repair Group 01; 10 to 26; 28 to 39)".
- After that "6-speed automatic transmission 09G".
- Press "01 - OBD".
- Press "Functions".
- Press "basic setting".