Backrest Adjustment Motor

Backrest Adjustment Motor

Special tools, testers and auxiliary items required

• Fixture for Seat Repair (VAS 6136)

• Locking compound, refer to Parts Catalog

Removing

• Follow all safety precautions when working on pyrotechnic components. Refer to => [ Restraint System Components ] Description and Operation.

• Before handling any airbag units (for example, when disconnecting the connector), the person handling them must "discharge static electricity". For example, by briefly touching the door striker pin.

- Remove the front seat:

• Standard and sport power seat, comfort seat and super sport seat, refer to => [ Power Standard Front Seat ] Power Standard Front Seat.

- Attach the front seat to the (VAS 6136). Refer to => [ Installing the Front Seat on VAS 6136 ] Installing the Front Seat On VAS 6136.

- Remove tunnel side trim panel. Refer to => [ Tunnel Side Trim ] Tunnel Side Trim.

- Remove backrest cover panel. Refer to => [ Backrest Cover ] Backrest Cover.

- Mark the angle adjustment of the left and right backrest mounting brackets on the seat as follows:






- Make a permanent mark (line) - arrow A - on the backrest frame - 2 - right at the front edge - arrow B - of the anchor - 1 -.

• Do not damage the surface of the anchor when marking it by scratching or denting it.

• Do not remove the cover - 4 - under any circumstances.

- Remove the nut - 5 - from the shaft - 3 -.

- Remove the cover from the backrest near the backrest hinge. Refer to => [ Backrest Cover with Cushion ] Backrest Cover With Cushion.






• The switch unit must be removed to remove the backrest adjustment motor - 7 - but it does not need to be replaced.

- Remove the switch unit. Refer to => [ Switch Unit, Micro Switch for Backrest Adjustment Wheel ] Switch Unit, Micro Switch For Backrest Adjustment Wheel.

- Remove the shaft - 3 - in the direction of the - arrow - from the backrest frame - 1 -.

- Disconnect the connector - 6 - on the backrest adjustment motor.

- Remove the bolt - 2 -.

- Remove the bracket adjustment motor - 7 - from the bracket - 5 -.

Installing

• Follow all safety precautions when working on pyrotechnic components. Refer to => [ Restraint System Components ] Description and Operation.

• Before handling any airbag units (for example, when connecting the connector), the person handling them must "discharge static electricity". For example, by briefly touching the door striker pin.

- threaded screw holes must always be cleaned (for example, with thread cutter)

- Before installing, clean the shaft thread - 3 - (for example, with thread cutter).






- Check the position of the backrest frame - 2 - and the anchor - 1 - on the left and right side.

• The left and right backrest frames must be in the position marked before removal - A and B arrows -.

- If the left and right backrest frames are not in the position marked before removal, correct their position accordingly.

- Position the backrest adjustment motor - 1 - on the bracket - 3 -.






- Replace the bolt - 4 -. Coat it with locking compound fluid and tighten it by hand. Refer to the Parts Catalog.

• It must still be possible to move the backrest adjustment motor.

- First slide the shaft through the anchor (tunnel side) as far as the stop - 2 - in the backrest adjustment motor.

- Check if the profile of the inserted shaft and the mount - 2 - in the backrest adjustment motor to see if they align.

• If the shaft profile and the mount in the backrest adjustment motor align:

- Slide the shaft through the mount in the backrest adjustment motor up to approximately the middle of the seat.

• If the shaft profile and the mount in the backrest adjustment motor do not align:

- Connect an external power source (12 Volt) to the backrest adjustment motor - 1 -.

- Rotate the mount - 2 - until it aligns with the shaft profile.

- Slide the shaft through the mount in the backrest adjustment motor up to approximately the middle of the seat.

- Install the switch unit Refer to => [ Installing ] Switch Unit, Micro Switch For Backrest Adjustment Wheel.

- Slide the shaft - 3 - through the spindle and the anchor (sill side) as far as the stop.






- Apply locking compound to the threaded section of the shaft. Refer to the Parts Catalog.

- Install and tighten the new nut - 5 - on the shaft.

- Bolt the backrest adjustment motor on the bracket - 3 - and tighten it to the tightening specification.






- Adjust the switch unit micro switch - 2 - Refer to => [ Switch Unit Micro Switch, Adjusting ] Switch Unit Micro Switch, Adjusting.






- After adjusting the switch unit, slide the locking bushing - 4 - onto the spindle - 3 -.

- Lock the locking bushing with the spindle.

- Check the switch unit Refer to => [ Switch Unit Micro Switch, Checking ] Switch Unit Micro Switch, Checking.

Further installation is performed in reverse sequence of removal, but observe the following:

• Make sure the connectors are installed all the way in and are secure.

Connect the battery with the ignition switched on. Pyrotechnic components could deploy after connecting the battery if they were not repaired correctly. Individuals must not be inside the vehicle when connecting the battery.

- Connect the battery Ground (GND) cable with the ignition turned on.

• If the airbag indicator lamp (K75) indicates a fault after installation, the Diagnostic Trouble Code (DTC) memory must be checked, deleted and checked again Refer to Vehicle diagnostic tester.

- Perform the following after removing and installing the backrest adjustment motor:

• Calibration, performing, refer to => [ Switch Unit, Calibrating ] Switch Unit, Calibrating.

• Perform function test, refer to => [ Function Test, Performing ] Function Test, Performing.

Tightening specifications, refer to => [ Backrest Adjustment Motor Assembly Overview ] Backrest Adjustment Motor Assembly Overview.