High-Voltage System, De-Energizing

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

Special tools and workshop equipment required

Test Adapter - Hybrid Module: VAS6558A

Courtesy of AUDI OF AMERICA, LLC
Warning Sign - High Voltage: VAS6649

Courtesy of AUDI OF AMERICA, LLC
Warning Sign - "Do Not Switch On": VAS6650A

Fig 1: Identifying Warning Sign - Do Not Switch On, Work In Progress VAS6650A
Courtesy of AUDI OF AMERICA, LLC
Padlock: T40262/1

Courtesy of AUDI OF AMERICA, LLC
Vehicle Diagnostic Tester

Procedure

De-energizing the high-voltage system is done exclusively via the Diagnosis mode using the Vehicle Diagnostic Tester.

CAUTION:

There is a risk of fatal injury due to high voltage.

Electrocution by direct contact or electric arc can cause severe bodily injury or fatal injury.

- Have an Audi high-voltage technician (HVT) or an Audi high-voltage expert (HVE) de-energize the high-voltage system.

De-energizing the high-voltage system:

-- Connect the Vehicle Diagnostic Tester.

-- Select the ODIS service mode and start.

-- Select the special functions tab.

-- Select one after the other:

High Voltage
0051 - De-energizing the high-voltage system

-- If the contact protection on the high-voltage components is removed, it is required in the program process and a redundant voltage measurement is performed.

-- The prompt to disconnect the High-Voltage System Maintenance Connector -TW- will appear over the course of the program.

The High-Voltage System Maintenance Connector -TW- is an electrical bridge between the contacts and the Hybrid Battery Unit -AX1- and is always disconnected when the high-voltage system must be de-energized.

High-Voltage System Maintenance Connector -TW-, Disconnecting

Fig 2: High-Voltage System Maintenance Connector TW

Courtesy of AUDI OF AMERICA, LLC

-- Remove the retainer -2- from the connector housing.

-- Press the release downward and pull the High-Voltage System Maintenance Connector -TW- -1- all the way out.

-- Secure the High-Voltage System Maintenance Connector -TW- -1- with the Service Disconnect Lock: T40262/1 .

Courtesy of AUDI OF AMERICA, LLC

If the High-Voltage System Maintenance Connector -TW- is disconnected, the contact connection is disconnected and the residual voltage in the high-voltage system reduces. The high-voltage system is then de-energized.