VW CGRA - 4 Electronic power control (EPC)

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3 Checking fuel pump
⇒ “3.1 Checking fuel pressure”, page 196 .
⇒ “3.2 Checking holding pressure”, page 200 .
Special tools and workshop equipment required
♦ Pressure gauge - VAS 6550-
♦ Hose - VAS 6550/2-
♦ Connecting nipple - VAS 6550/3-1-
♦ Connector cable - VAS 6550/3-2-
♦ Connector cable - VAS 6550/3-3-
♦ Connector cable - VAS 6550/3-4-
♦ Vehicle diagnostic tester
♦ Measuring container
♦ Current flow diagram
Test conditions:
• The event memory of the engine control unit contains no event
entry relating to the voltage supply to the fuel pump.
• Fuel pump control unit - J538- OK.
• Battery charger connected ⇒ Electrical system; Rep. gr. 27 ;
Charging battery .
• Fuse for fuel pump OK. Fuse assignment ⇒ Current flow dia‐
grams, Electrical fault finding and Fitting locations
• Fuel filter OK.
• Fuel tank filled at least to more than reserve quantity.
• Ignition off
3.1 Checking fuel pressure
– Note safety precautions before starting installation work
⇒ page 173 .
– Observe rules for cleanliness ⇒ page 175 .
WARNING
The fuel line is under pressure.
Fuel poses danger of injury to eyes and skin.
Wear protective goggles and protective clothing to avoid injury
and contact with the skin. Wrap a cloth around the connection
before loosening hose connections. Then reduce pressure by
carefully opening the connection.
Touareg 2010 ➤ , Touareg 2015 ➤
6-cylinder direct-injection engine (3.6 l engine, 4V) - Edition 12.2019
196 Rep. gr.20 - Fuel supply system