eGolf EAZ Drive unit buzzing sound repair operation manual 240420250123125

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Repair manual price: 600€ + Tax

This operation manual is a proprietary business secret that outlines the successful refurbishment process for repair Motor inverter system and data recovery. By following the provided instruction steps, which include text, images, and videos, you will be fully equipped to repair the Inverter effectively and efficiently. Manual is non-refundable

You can charge this service: 1600€
You need 20 labor hours to deploy this repair if you are removing battery pack
Author: Domagoj
Common causes:

Normal Tear & Wear 100,000-150,000km
Bearing quality
Oil Quality

Errors:

Buzzing sound

Part numbers:
  • 9M3ES78GF,
  • 0EA010010,
Tools needed (prepare it) :
  • Torx T20, T25,
  • Allen key 5,6,7,8,9.10
  • Other mechanic workshop tools
  • Fluke Voltmeter
  • Repair kit ( HERE )
  • Gearbox oil
  • Movable hydraulic liftbench
  • OBD Diagnostic
  • HV Gloves
  • Gedore StatorLift (optional)
Repair operation steps
 Step 1:
Before performing any work on the eGolf high-voltage Drive unit, it is mandatory to prepare a controlled and safe working environment in accordance with high-voltage safety protocols. Lvl 3 HV Access license needed.

Read error codes with diagnostic tool and confirm you have same error codes and faults.

Secure the work area – The workspace must be clean, dry, clearly marked as an HV zone, and equipped with proper safety gear (HV gloves, face shield, insulating mat).

Disconnect the 12V system 

Perform safe high-voltage system shutdown – Using approved tools and following OEM procedures, disconnect the HV connectors and wait the required cool-down period for capacitor discharge.

Verify absence of voltage (Zero Voltage Verification) – Use an appropriate HV tester to ensure that no voltage is present in the system before proceeding.

Remove the battery pack – Once confirmed safe, proceed with mechanical removal of the battery pack using factory mounting points and proper lifting equipment
 First thing is to disconnect 12 V battery and then HVIL in exact order
 Lift the car and remove both front wheels. Note: Lug nuts will probably have one safety nut so locate the...
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