Starting The 48 V Vehicle Electrical System

WARNING: This page is about a different variant/trim than selected.

All 48-volt system components must be installed in the vehicle according to specifications:

> 407719 REMOVING AND INSTALLING FRONT ANTI-ROLL BAR (PDCC)

> 429019 REMOVING AND INSTALLING ANTI-ROLL BAR (PDCC)

> 270719 REMOVING AND INSTALLING 48-VOLT ADDITIONAL BATTERY

> 430819 REMOVING AND INSTALLING PDCC CONTROL UNIT

> 270319 REMOVING AND INSTALLING 48-VOLT VOLTAGE CONVERTER

> 270619 REMOVING AND REINSTALLING BATTERY

> Refer to the appropriate service information.

> 978919 REMOVING AND INSTALLING 48-VOLT POWER DISTRIBUTOR

Remove the insulating tape used when disconnecting contacts on the terminal clamps for the 12 V vehicle electrical system battery.

Connect 12 V vehicle electrical system battery.

> 270619 REMOVING AND INSTALLING VEHICLE ELECTRICAL SYSTEM BATTERY - on "Installing"

NOTIFICATION

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 PIWIS Tester instructions 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 on the PIWIS Tester.

Connect the Tester to the vehicle and start it. Switch on ignition.

Select the vehicle type if required.

Select the Gateway control unit in the overview. Press F12 to continue. The message "Create Vehicle Analysis Log (VAL)?" appears. Press F11 to continue.

Maintenance/repairs must now be selected. Press F12 to continue.

Customer-specific settings must be selected. Press F12 to continue.

Activate 48-volt vehicle electrical system must be selected. Press F12 to continue.

Read the information and instructions displayed on the Tester. Press F8 to start.

Perform procedure according to menu guidance. Follow the instructions on the Tester. Press F8 to continue.

Go back to the overview. Press F11 to continue.

Read out fault memory and erase it if necessary.

Exit the diagnostic application. Switch off ignition. Disconnect the Tester from the vehicle.