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Checking fuel delivery rate, engine codes BSE, BSF, CCSA, CMXA > < Checking function and voltage supply

Golf Mk6

Checking fuel delivery rate, engine code BGU
Checking fuel delivery rate, engine code BGU
l  Voltage supply OK.
l  Fuel pressure regulator and holding pressure OK, checking → Chapter
l  Fuel filter OK.
–  Remove filler cap from fuel tank filler neck.
–  Open cover of relay and fuse holder of engine compartment electronics box.
–  Pull fuse SB 33 out of socket F 33 of fuse holder.
   
–  Connect remote control -V.A.G 1348/3 A- with adapter cable -V.A.G 1348/3-3- to right terminal of fuse socket F33.
–  Tape off 2nd connector contact of the adapter cable -V.A.G 1348/3-3- with insulating tape -arrow- to prevent short circuits.
–  Connect crocodile clip to vehicle battery (+).
  Note
The delivery rate of fuel pump is measured at 4 bar. Therefore, test fuel pressure before measuring fuel delivery rate → Chapter.
  WARNING
Fuel supply line is pressurised. Wear eye protection and protective clothing to avoid possible injury and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully pulling hose off connection.
  A20-1095
–  Pull off return line -1- from fuel pressure regulator.
  Note
Press in securing ring to release fuel line.
–  Connect adapter set -VAS 6550/1- to fuel pressure regulator and hold end of adapter in measuring container.
–  Operate remote control -V.A.G 1348/3A- for about 5 seconds to fill fuel filter.
–  Empty measuring container.
–  The delivery rate of the fuel pump depends on the voltage. Therefore connect the multimeter to the battery.
–  Operate remote control for 30 seconds while measuring battery voltage.
  N20-10642
–  Compare quantity of fuel delivered with specification.
*) Minimum delivery rate cm³/30 s
**) Voltage at fuel pump with engine not running and pump running (approx. 2 volts less than battery voltage).
Example
During the test a voltage of 12.5 volts is measured at the battery. Because the voltage at the pump is approx. 2 volts less than the battery voltage, this will equate to a minimum delivery rate of 580 cm³/30 s.
If minimum delivery rate is not attained:
–  Check fuel pipes for possible restrictions (kinks) or blockages.
If fuel line is OK
–  Check fuel delivery rate before fuel filter (proceed as follows):
  WARNING
Fuel supply line is pressurised. Wear eye protection and protective clothing to avoid possible injury and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully pulling hose off connection.
  N20-10138
–  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.
–  Operate remote control again for 30 seconds. Compare fuel delivery rate with the first measurement.
If the minimum delivery rate is now attained
–  Renew fuel filter.
If the minimum delivery rate is again not attained:
–  Remove fuel delivery unit and check filter strainer for soiling.
Only if still no fault has been detected:
–  Renew fuel delivery unit → Chapter.
–  Reconnect all disconnected fuel lines.
–  Bleed fuel system → Chapter.
  N20-10632

Checking fuel delivery rate, engine codes BSE, BSF, CCSA, CMXA > < Checking function and voltage supply