Description:

The error code ETC 522343.04 is triggered when the power module (HF) PC6 measures a current in excess of 30 amps in lead 2031 while the rear window heater is switched on. This indicates a short to ground in the circuit.

Reaction:

When this fault is detected, the power module may deactivate the rear window heater to prevent damage due to excessive current. This will result in the rear window heater not functioning properly.

Recommendations:

Inspect Electrical Circuits:

• Check for Shorts to Ground: Inspect the wiring and connectors for the rear window heater resistor (R17) for signs of short circuits to ground. Look for damaged insulation, exposed wires, or pinched cables.
• Measure Current Draw: Use a multimeter to measure the current draw in lead 2031 to ensure it is within the specified range (below 30 amps).

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 drawing excessive current.
• 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 shorted wiring in the rear window heater circuit. Ensure all connections are secure and properly insulated.

Note:

Regular maintenance and inspection of the electrical components associated with the heated rear window can help prevent issues related to high current draw. Ensuring proper routing and securing of wires can reduce the risk of shorts and enhance system reliability.