VW CGRA - Page 251

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– Switch on tester - VAS 6394/1- to do this, press button -A- once
briefly.
Note
♦ When button -A- is pressed for 2 seconds, the illumination will
be switched on for 20 seconds.
♦ If the digital pressure gauge - VAS 6394/1- reading is not 0
bar, perform zero calibration procedure ⇒ operating instruc‐
tions .
– Connect vehicle diagnostic tester to diagnostic connection.
– Switch ignition on.
– Press following buttons on display of diagnostic tester one af‐
ter the other:
Vehicle self-diagnosis
Self-diagnosis ►
01 - Engine electronics ►
011 - Measured values ►
– Select measured value block 1 4 0 and confirm with Q .
The actual fuel pressure value is shown in display zone 3, meas‐
ured by the fuel pressure sender - G247- .
– Start engine.
– Compare the displayed pressure of pressure tester - VAS
6394/1- with the displayed actual value on vehicle diagnostic
tester .
• A maximum pressure deviation of 5 bar is permissible.
– If the deviation is greater than 5 bar, renew fuel pressure
sender - G247- .
– Repeat the test with the new fuel pressure sender - G247- and
compare both measured values.
If measured values again fail to correspond:
– Check wiring ⇒ Vehicle diagnostic tester.
Touareg 2010 ➤ , Touareg 2015 ➤
6-cylinder direct-injection engine (3.6 l engine, 4V) - Edition 12.2019
5. Senders and sensors 245