Description:

The error code ETC 523848.07 is triggered when the control unit receives a valid position signal from the potentiometer of the air distribution adjusting motor (B132), but the motor cannot be moved to its desired position via the motor’s connecting leads. This indicates a mechanical fault at the air distribution or an open line at the motor’s connecting lines.

Reaction:

When this fault is detected, the control unit may disable or limit the operation of the air distribution adjusting motor to prevent further issues. This can result in incorrect positioning of the air distribution flaps, affecting the ventilation system’s performance.

Recommendations:

Inspect Mechanical Components:

• Check for Obstructions: Verify that the air distribution flaps can move freely and are not obstructed by debris or mechanical faults.
• Inspect Motor Operation: Ensure the adjusting motor (B132) is functioning properly and can move the flaps as required.

Inspect Electrical Circuits:

• Check for Open Circuits: Inspect the wiring and connectors for the adjusting motor for signs of open circuits. Look for broken wires, loose connections, or damaged insulation.
• Measure Voltage and Signal: Use a multimeter to measure the voltage and signal at the motor’s connecting leads to ensure proper operation.

Test and Replace Components:

• Test Adjusting Motor and Potentiometer: Verify the operation of the B132 adjusting motor and potentiometer. Replace any components found to be malfunctioning.
• Inspect Control Unit: Ensure that the control unit is functioning correctly. Replace the control unit if it is found to be faulty.

Repair or Replace Wiring:

• Fix Open Circuits: Repair or replace any open or faulty wiring in the air distribution adjusting motor circuit. Ensure all connections are secure and properly insulated.

Note:

Regular maintenance and inspection of both the mechanical and electrical components of the air distribution system can help prevent faults. Ensuring proper operation and connectivity will enhance system reliability and performance.