Battery Cut-Off Relay J655 - Audi A6´05 323 Service

Passenger protection

Battery cut-off relay J655

The Audi A6'05, like the Audi A8'03, will also be
equipped with the battery cut-off function in the
event of a crash.
The battery cut-off relay disconnects the starter and
generator lines from the vehicle's battery (located in
the boot) in the event of a crash. This avoids
short-circuits, which could result in the vehicle
catching fire.
On being triggered by the airbag control unit,
a white field is visible in the element viewing
window instead of a copper coil.
The airbag control unit monitors the diagnosis
process and stores faults which have occurred.
The battery cut-off relay is activated every time an
airbag is triggered and upon detection of a rear-end
crash.
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A battery cut-off relay which has triggered must
always be replaced.
The electric battery cut-off relay will be replaced by
a pyrotechnic one in the middle of 2004.
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