Air Flow Door Motor (V71)

Air Flow Door Motor (V71)

• Perform Basic Setting of A/C system after installing the control motor. Refer to the Vehicle diagnostic tester in "Guided Fault Finding".

• Using the functions "Output diagnostic test mode" and "Basic setting", the activation of A/C system electrical components can be tested if necessary (for example allocation test). Refer to the Vehicle diagnostic tester in "Guided Fault Finding" function.

• Currently in this vehicle, all motors are identical in construction. During the basic setting, the control motors are assigned and adapted corresponding to the switching sequence of the wiring. If this sequence does not conform the specification, the control motors will adapt incorrectly and the door control will be wrong. Refer to => [ A/C Control Motor Block Diagram ] A/C Control Motor Block Diagram.

• After installing new positioning motor, check activation through the Climatronic Control Module (J255) and check function (correct position of recirculation door and back pressure/fresh air door). Refer to the Vehicle diagnostic tester in "Guided Fault Finding".

• Air flow door motor function, refer to => [ Back Pressure Door Motor (V71), Function ] Back Pressure Door Motor (V71), Function.

Removing

- Move the passenger seats as far back as possible.

- Turn off the ignition.

- Remove the air intake housing. Refer to => [ A/C Unit Air Intake Housing ] A/C Unit Air Intake Housing.

- Remove the air intake housing from the air intake manifold. Refer to => [ Air Intake Duct, Removing from Air Intake Housing ] Air Intake Duct, Removing From Air Intake Housing.

- Remove bolts - B -.






- Counter hold on the cam plate - A - and disconnect the control motor - C - from the cam plate - A -.

Installing

Installation is carried out in the reverse order while observing the following.

- Check the lever for the back pressure door - D - and for the fresh air door - E - ; they must fit correctly in the cam plate - A -.

- Install the control motor shaft - C - into the cam plate bracket - A -.

• The control motor does not have a stop; the control motor shaft - C - can be inserted into the cam plate mount - A - at any position

- Install bolts - B -.

- Install the removed parts in the opposite order.

- Perform a basic setting and the output Diagnostic Test Mode (DTM) on the A/C system using the Vehicle diagnostic tester in "Guided Fault Finding".

• On this vehicle, the control motors are equipped with electronics, during the first basic setting, a new control motor learns its position on the air conditioner and can then be controlled by the Climatronic Control Module (J255) (currently all control motors are identical). Refer to the Vehicle diagnostic tester in "Guided Fault Finding".

• During the basic setting, the control motors are assigned and adapted corresponding to the switching sequence of the wiring. If this sequence does not conform the specification, the control motors will adapt incorrectly and the door control will be wrong. Refer to => [ A/C Control Motor Block Diagram ] A/C Control Motor Block Diagram.

- Check the Climatronic Control Module (J255) DTC memory and erase any displayed malfunction if necessary using the Vehicle diagnostic tester in "Guided Fault Finding" function.