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3
Engine control unit
Removing and installing engine control unit
⇒ page 167
.
Reading and clearing engine control unit fault memory
⇒ page 167
.
3.1
Removing and installing engine control
unit
If you wish to replace the engine control unit, connect the vehicle
diagnosis, testing and information system - VAS 5051B- and carry
out the guided function “Renew control unit”.
Removing
– Switch off ignition.
– Remove windscreen wiper motor on right side: ⇒ Electrical
system; Rep. gr. 92 ; Removing and installing windscreen
wiper system .
– Release both connectors from control unit and pull off.
– Control unit can now be removed.
Installing
– Place control unit into retaining frame.
– Fit connector and lock in position.
– Install windscreen wiper motor on right side: ⇒ Electrical sys‐
tem; Rep. gr. 92 ; Windscreen wiper system .
– Install plenum chamber cover.
– Adapt new engine control unit: ⇒ Vehicle diagnostic tester;
“Guided functions” .
3.2
Reading and erasing engine control unit
fault memory
Special tools and workshop equipment required
♦ Vehicle diagnosis, testing and information system - VAS 5051-
♦ Diagnosis cable - VAS 5051/1- or -VAS 5051/3-
Procedure
– Connect vehicle diagnosis, testing and information system -
VAS 5051- as follows:
Phaeton 2003 ➤
6-cylinder injection engine - Edition 02.2014
3. Engine control unit
167
