Audi A8 2003 - Diesel Particulate Filter: Reading out Ash Deposit Volume

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Plenum chamber and water drains: checking for dirt
⇒ page 101
Toothed belt for camshaft drive and tensioning roller: renewing
⇒ page 108
Toothed belt for camshaft drive: renewing ⇒ page 108
Spark plugs: renewing ⇒ page 76
3.1 Diesel particulate filter: reading out ash
deposit volume
Table of test values and procedure guidelines:
Engine Measured value designation for di‐
agnostic tester
Maximum value for ash deposit
6-cyl. diesel engine 3.0 ltr. TDI com‐
mon rail
Measured value block 104/zone 1 Oil ash deposit volume: 460 ml
8-cyl. diesel engine 4.0 ltr. TDI/
4.2 ltr. TDI
Exhaust bank 1: Measured value
block 105/zone 1
Exhaust bank 2: Measured value
block 106/zone 1
Oil ash deposit volume: 760 ml
Procedure:
– Connect vehicle diagnostic tester ⇒ page 14 .
– Select Diagnosis mode and begin diagnosis.
– Perform vehicle identification.
– De-select “Working with Guided Fault Finding” by removing
v and press Apply .
– Continue to follow instructions on screen.
– Switch to “Control units” tab.
– Select control unit “01 — Engine electronics” and carry out
following functions via right mouse button:
♦ Identify control unit
♦ Guided Functions
♦ 01 - Read measured values
– Select desired measured value (see table of test values and
procedure guidelines ⇒ page 19 ) by entering v and confirm‐
ing with OK
.
– Evaluate measured value and follow further instructions on
screen.
– Perform the following measures according to the measured
value:
Result: Measure:
Measured value < critical
value
Vehicle can be driven for a further 30,000 km (19,000 miles).
Measured value ≥ critical
value
Renew diesel particulate filter and reset measured value to zero ⇒ Rep. gr. 26 ;
Removing and installing parts of exhaust system - vehicles with particulate filter;
Removing and installing particulate filter with main catalytic converter .
Audi A8 2003 ➤
Maintenance - Edition 06.2014
3. Maintenance 19