Disconnecting 48 V Vehicle Electrical System
- Electric shock
- Short circuit
- Fire
- Explosion
→ Only appropriately trained and authorised persons are permitted to work on high-voltage vehicles and components.
→ Required qualification: High voltage technician or high voltage expert.
→ Observe national requirements and legislation for this work.
→ Always use insulated tools, e.g. > VAS 6883 - Insulated Tool Set when working on these components.
→ Observe general warning notes for working on the high-voltage system.
> 2X00IN GENERAL WARNING NOTES FOR WORKING ON THE HIGH-VOLTAGE SYSTEM
Information
Observe the following specifications for all work described:
- country-specific, national, legal and official regulations,
- local restrictions and export restrictions,
- manufacturer's specifications from component and vehicle manufacturers,
- component-specific specifications.
These strict specifications apply in particular:
- Storage, installation and removal, transport and disposal of vehicles, assemblies, operating materials and auxiliary materials,
- handling of defective and potentially hazardous vehicles as well as assemblies,
- handling of battery electric vehicles and high-voltage components.
For this purpose, take into account relevant and qualified information sources such as local authorities, responsible importers, associations and specialist website. Deliver items to be disposed of only to authorised reception points.
Voltage drop
- Irreparable damage to control unit
- Damage to control unit
- Fault entries in the control unit
- Control unit programming/coding is aborted
- Malfunctions in the control unit, even during programming/coding
→ Switch off ignition before disconnecting the control unit.
→ Make sure that the power supply is not interrupted during programming/coding.
→ Connect the battery charger with at least > current 90 A to the vehicle battery.
Information
The instructions in the Tester take precedence, since the description may be different with later Tester releases.
The procedure described here has been structured in general terms. Different text or additional information may appear in the Tester .
- Connect the Tester to the vehicle and start it. Switch on ignition.
- Select the vehicle type if necessary.
- Select the Gateway control unit in the overview . Press F12 to continue. The message "Create Vehicle Analysis Log (VAL)?" appears. Press F11 to continue.
- Select Coding/programming . Press F12 to continue.
- Select customer specific settings . Press F12 to continue.
- Select 48 V system . Press F12 to continue.
- Select Deactivate function on the Value tab.
- Perform procedure according to menu guidance. Read and follow the information and instructions on the Tester.
- Go back to the overview. Press F11 to continue.
- The following 48-volt system components can now be removed and installed or replaced:
> 407719 REMOVING AND INSTALLING FRONT STABILIZER (PDCC)