General Control Motor Information

General Control Motor Information

A/C system malfunctions

• Malfunctions in the A/C system can occur if the control motor and/or the corresponding connectors are switched. Refer to => [ A/C Control Motor Block Diagram ] A/C Control Motor Block Diagram.

• The control motors and connectors are identical. If they are installed or connected incorrectly, the corresponding doors cannot be properly adapted and/or controlled.

• The control motors are assigned via the "Addressing" function in "Guided Fault Finding".

• Installing the control motors at a different location in the A/C system after "adaptation" results in malfunctions. Therefore, label the control motors prior to removal.

• The mount of a control motor does not have a stop. It turns continuously if the control motor is activated. Therefore, this should not be activated with the control motor removed.

• The A/C system includes various identical harness connectors. Label the electrical harness connectors prior to disconnecting them (to prevent mix-up).

• Various control motors are installed on the air distributor box and the air intake unit. They have different electrical values and a different part number index. Refer to Electronic Parts Catalog (ETKA). Label the control motors prior to removal (to prevent mix-up).

• The mount for the door/actuator lever shaft does not have a stop in the control motor. It rotates continuously if the control motor is activated. Therefore, the control motor should not be activated when removed.

• Therefore, perform the basic setting for the A/C system after installation of the control motor using the Vehicle Diagnostic Tester in the"Guided Fault Finding" function.

• 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 with 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.

• Using the "output diagnostic test mode" and "basic setting" functions, the activation of A/C system electrical components can be tested if necessary (for example, allocation test) using the Vehicle Diagnostic Tester in the"Guided Fault Finding" function.

• After installation of a new control motor, perform the basic setting and test activation by the Climatronic control module (J255) , and control motor function using the Vehicle Diagnostic Tester in the"Guided Fault Finding" function.