Operation CHARM: Car repair manuals for everyone.
Home >> Audi >> 2012 >> Q5 Quattro (8RB) V6-3.2L (CALB) >> Repair and Diagnosis >> Heating and Air Conditioning >> Description and Operation >> A/C Control Motor Block Diagram

A/C Control Motor Block Diagram






A/C Control Motor Block Diagram

• Revised A/C units are being installed from MY 12 (use depends on the vehicle version) (A/C unit part number "8T_ 820 005"). With the introduction of these A/C units, other control motors are also being installed, which can be installed with both versions of the A/C units (interchanging is currently permitted). Refer to the Parts Catalog and the Vehicle Diagnostic Tester in "Guided Fault Finding" function.

• On this vehicle, the different control motors (- A - through - N -) on the A/C are adapted and controlled over a data line. The different control motors (- A - through - N -) are connected in sequence to the Climatronic Control Module (J255) via this data line (LIN bus). If there is a malfunction on one control motor or in the wiring, this malfunction can lead to different malfunction entries with different malfunction types. Check using the Vehicle Diagnostic Tester under "Guided Fault Finding" and.






• The number of control motors on the A/C depends on the A/C version (on the "Basis" A/C system there are 6 control motors, and on the "Comfort" A/C system there are 10 control motors).

• The sequence of the control motors in the wiring depends on the A/C version ("Basis" or "Comfort"). When equipped with the "Comfort" A/C system, the left temperature flap motor (V158) is installed in position - A -. Vehicles with the "Basis" A/C system, the temperature regulator door motor (V68) is installed at - A -.

Dependent on the operation mode or the function of the A/C Guided Fault Finding in which a malfunction appears, the effect of the malfunction and the type of malfunction stored in the DTC memory is different. Check using the Vehicle Diagnostic Tester under "Guided Fault Finding".

• If there is a malfunction in the control motors sequence (two or more terminals or control motors were interchanged while being installed)

- If these control motors were improperly adapted during the basic setting and the activation of the doors is incorrect (incorrect assignment)

- Depending on the adjustment range for this control motor, an incorrect end stop is recognized during the basic setting and this is stored as a malfunction in the event memory, and the basic setting is terminated.

- If the wrong door moves, then the air flow direction is incorrect. This is not always recognized as a fault depending on the adjustment range of the control motor. Always mark all connectors before disconnecting them and perform a basic setting after connecting them.

• If there is a malfunction in the normal operation of the A/C, then the following malfunction entries can result, depending on the type of malfunction.

- If there is a malfunction in the ground connection to a control motor, then this control motor can no longer exchange information with the Climatronic Control Module and this control motor will store this in the DTC memory.

- If there is a malfunction in the data line to a control motor (for example, an interruption in the connector to the control motor - B - contact "2" ), then this control motor and all the connected control motors (- C - through - N -) in the sequence switching after this motor can no longer exchange information with A/C Control Head Climatronic control module ; this motor as well as all the other connected control motors will be stored in the DTC memory.

- If a malfunction occurs in the control motor electronics (for example, in control motor - B -), the control motor - B - can possibly still exchange information with the with the A/C Control Head Climatronic control module, depending on the type of malfunction, however all the motors connected after this one (- C - through - N -) will be stored in the DTC memory.

• If there is a malfunction during the basic setting of the A/C, then the following malfunction entries can result, depending on the type of malfunction.

- If there is a malfunction in the ground connection to a control motor, (for example to control motor - B -) , then this control motor cannot exchange information with the Climatronic control module display and control head will not be recognized during the basic setting. During the basic setting, all the control motors from the last control motor beginning with - N - are re-allocated and re-assigned; this control motor is no longer in sequence. The A/C Control Head Climatronic control module recognizes that a control motor is missing and saves the first control motor in the sequence switching as missing (for example, on left-hand drive vehicles equipped with the "Comfort" A/C system, the Left Temperature Door Motor (V158) ) ; moreover, the malfunction will display as"Automatic Addressing Malfunctioning" and possibly by certain control motors "Upper or Lower Values Exceeded".

- If there is a malfunction in the data line to a control motor (for example, an interruption in the connector leading to contact "2" of the control motor - C -), then this motor and all the other connected motors in the sequence switching can no longer exchange information with the Climatronic control module display and control head and these motors will not be recognized in the basic setting. During the basic setting, all the control motors from the last control motor beginning with - N - are re-allocated and re-assigned; these control motors are no longer in sequence. The A/C Control Head Climatronic control module recognized that several control motors are missing (only control motors - B - - A - are recognized and incorrectly assigned and adapted as back pressure door motor (V71) and air recirculation door motor (V113) ). All other control motors (for example, with the "Comfort" A/C system, from the right footwell door motor (V109) up to the left temperature door motor (V158) ) are stored in the DTC memory as missing and the malfunction is displayed as "Automatic Addressing malfunctioning".

- If a malfunction occurs in the control motor electronics or during the basic setting (for example, in control motor - C -), the motor can possibly still exchange information with the with the Climatronic control module display and control head depending on the type of malfunction, however all the motors connected after this one (up to motor - N -) no data can be exchanged. The Climatronic control module display and control head recognizes that several control motors are missing (only control motors - C - up to - A - are recognized and incorrectly assigned and adapted as recirculation door motor and back pressure door motor and right footwell door motor). All other control motors (for example, on vehicles equipped with the "Comfort" A/C system, from the right center vent motor (V111) up to the left temperature door motor) are stored in the DTC memory as missing and the malfunction is displayed as "Automatic Addressing malfunctioning".

pro multis · About Operation CHARM