Description:

The error code ETC 523848.05 is triggered when the control unit measures too low an amperage at adjusting motor connecting leads 2028 and/or 2029. This indicates that the circuit is open or shorted.

Reaction:

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

Recommendations:

Inspect Electrical Circuits:

• Check for Open Circuits or Shorts: Inspect the wiring and connectors for signs of open circuits or shorts. Look for broken wires, loose connections, or damaged insulation.
• Measure Current Flow: Use a multimeter to measure the current flow at leads 2028 and/or 2029 to ensure it is within the specified range.

Test and Replace Components:

• Test Adjusting Motor: Verify the operation of the B132 adjusting motor. Replace the motor if it is found to be malfunctioning or not drawing the expected current.
• 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 or Shorts: Repair or replace any open or faulty wiring in the air distribution adjusting motor circuit. Ensure all connections are secure and properly insulated.

Note:

Maintaining the integrity of the electrical connections and ensuring proper current flow is crucial for the reliable operation of the air distribution adjusting motor. Regular inspection and timely repairs of the electrical system can help prevent issues related to low current and ensure proper system performance.