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Checking current draw > < Checking fuel delivery rate (engine codes CAWA, CAWB, CBFA, CCTA, CCTB, BZB, CGYA)

Golf Mk5

Checking fuel delivery rate (engine codes CCZA, CCZB, CDAA, CDAB)
Checking fuel delivery rate (engine codes CCZA, CCZB, CDAA, CDAB)
  Note
The fuel delivery rate must first be checked in the engine compartment with the help of the function „Checking fuel delivery rate, quick test“. If the minimum delivery rate is not achieved, a 2nd measurement must be carried out at the flange of the fuel delivery unit.
Checking fuel delivery rate in engine compartment:
–  Connect vehicle diagnosis and service information system -VAS 5052 B- to vehicle.
–  Select Guided functions in -VAS 5052 B-.
–  Carry out vehicle identification.
–  Select Engine.
–  Select Checking fuel delivery rate, quick test.
–  Follow instructions on vehicle diagnosis and service information system -VAS 5052 B-.
Checking fuel delivery rate at flange:
l  The guided function „Checking fuel delivery rate, quick test“ has been carried out → Vehicle diagnostic tester
l  The remote control -V.A.G 1348/3A- and test instrument adapter/DSO (5-pin) -VAS 5565- have been connected to the fuel delivery unit.
l  Battery charger connected
l  Filling level in fuel tank above reserve
Test sequence:
  WARNING
Fuel supply line is pressurised.
Danger of eye and skin injuries caused by fuel.
Wear eye protection and protective clothing to avoid eye injuries and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully opening the connection.
   
–  Pull fuel supply line -arrow- off fuel filter.
  N20-10629
–  Connect pressure tester -VAS 6550- to fuel supply line with adapter -VAS 6550/1-. Hold adapter -VAS 6550/2- in a measuring container.
–  Make sure that drain tap is closed and cut-off taps are open.
–  Operate remote control -V.A.G 1348/3A-. Then slowly close shut-off tap -arrow- until a pressure of 4 bar is displayed on pressure gauge. From this point on do not move position of shut-off tap.
–  Drain measuring container.
  N20-10632
–  The delivery rate of the fuel pump depends on the battery voltage. Therefore also connect multimeter -V.A.G 1715- to contacts -1- and -5- of adapter -VAS 5565-.
–  Operate remote control for 60 seconds while measuring voltage at fuel pump.
  N20-10423
–  Compare quantity of fuel delivered with specification.
*) Minimum delivery rate cm³/60 s
**) Voltage at fuel pump with engine not running and pump running.
Example:
During the test a voltage of 10.5 volts is measured. This equates to a minimum delivery rate of approx. 1200 cm³/60 s.
If the specification is not attained:
–  Remove cap from fuel filler neck and repeat check. If fuel delivery rate is now reached, check fuel tank breather.
If the specifications are still not attained:
–  Remove fuel delivery unit and check filter strainer for soiling.
–  If no fault is found here either, renew flange with fuel filter.
–  Repeat check.
If the specifications are still not attained:
–  Fuel pump defective, renew fuel delivery unit → Chapter.
If fuel delivery rate has been attained, but nevertheless you suspect a fuel supply system fault (e.g. intermittent failure of fuel supply system): Check fuel pressure with the engine running → Chapter.
  N20-10676

Checking current draw > < Checking fuel delivery rate (engine codes CAWA, CAWB, CBFA, CCTA, CCTB, BZB, CGYA)