Description:

The error code ETC 522343.01 is generated when the power module (HF) PC6 measures less than 3 volts at the supply voltage for the rear window heater output (lead 0742) when the rear window heater is switched on. This indicates a power supply fault in the circuit.

Reaction:

When this fault is detected, the power module may disable the heated rear window to prevent damage due to insufficient power supply. This will result in the rear window heater not functioning properly.

Recommendations:

Inspect Power Supply:

• Check Supply Voltage: Use a multimeter to measure the supply voltage at the rear window heater output. Ensure it is above 3 volts when the heater is activated.
• Inspect Wiring and Connections: Examine the wiring and connectors for the rear window heater for signs of damage, loose connections, or corrosion. Repair or replace any compromised wiring.

Test and Replace Components:

• Test Rear Window Heater Resistor: Verify the operation of the R17 resistor. Replace the resistor if it is found to be defective or causing a power supply fault.
• Inspect Power Module: Ensure that the power module (HF) PC6 is functioning correctly. Replace the power module if it is found to be faulty.

Repair or Replace Wiring:

• Fix Damaged Wiring: Repair or replace any damaged or faulty wiring in the rear window heater circuit. Ensure all connections are secure and properly insulated.

Note:

Maintaining a stable power supply to the heated rear window is essential for its reliable operation. Regular inspection and maintenance of the electrical connections can help prevent power supply faults and ensure proper system performance.