Disconnecting and connecting battery A and second battery A1 — AUDI

Disconnecting and connecting
battery
A
and
second battery
A1
WARNING
To de-energise the 12 Volt section of the system, the
battery
A
and the
second battery
A1
must always be disconnected at the same time.
DANGER!
Risk of fatal injury if high-voltage components are damaged.
Observe the following when working in the vicinity of high-voltage components or wiring:
It is not permitted to use cutting or forming tools, other sharp-edged tools or heat sources such as welding, brazing, soldering, hot air or thermal bonding equipment.
Before starting work, visually inspect the high-voltage components in the areas involved.
Before working in engine compartment, visually inspect
power and control electronics for electric drive
JX1
,
electric drive motor
V141
,
air conditioner compressor
V470
and high-voltage wiring.
Before working on the vehicle underbody, visually inspect the high-voltage wiring and covers.
Before working on the rear section of the vehicle, visually inspect the high-voltage wiring and the electro-box with the
maintenance connector for high-voltage system
TW
.
Visually inspect all potential equalisation lines.
Check the following when making the visual inspection:
There must be no external damage on any component.
The insulation of the high-voltage wiring and potential equalisation lines must not be damaged.
There must be no unusual deformation of the high-voltage wiring.
All high-voltage components must be identified by a red warning sticker.
Disconnecting
Remove rear exhaust air duct for drive battery
Heating, air conditioning
Rep. gr.
87
Air duct
.
Remove nuts
2, 4
and bolts
1, 6
.
Move wiring harness
5
clear and remove battery bracket
3
.
Slacken off nut
3
several turns and disconnect battery clamp
2
of earth cable from negative terminal of
battery
A
item 4
.
Release and detach cover
7
for negative terminal.
Slacken off nut
5
several turns and disconnect battery clamp
6
of earth cable from negative terminal of
second battery
A1
item 1
.
Connecting
Unplug electrical connector
2
at battery monitor control unit
J367
/
J934
item 3
.
When connecting battery, attach battery clamp of earth cable to negative battery terminal
“–”
by hand and tighten nut
1
.
Reconnect connector at battery monitor control unit.
The following measures are required after the batteries have been re-connected:
Activate automatic open/close function of electric window regulators
Owner's Manual for the vehicle
.
Interrogate event memories of all control units and erase
“Low voltage”
entry
Vehicle diagnostic tester
.
Note
After reconnecting the voltage supply, it is possible that the ESP warning lamp will not go out until the vehicle has been driven several metres.
Tightening torques
Chapter
“
Exploded view - battery,
battery
A
, vehicles with high-voltage system
”