skoda Workshop Repair Guides

Skoda Workshop Manuals

< PREV PAGE NEXT PAGE >
Testing fuel pump relayJ17
Testing fuel pump relay -J17-
The power supply of the fuel pump and some components of the injection system occurs via fuel pump relay -J17-.
Fitting location:
   
The fuel pump relay -J17- is located on the relay carrier on the left in the driver's footwell.
   ► 01.00 plug location 15
   02.00 ► Plug location 4
Special tools and workshop equipment required
t  Vehicle system tester -V.A.G 1552 -
t  Diagnostic cable -V.A.G 1551/3- or -V.A.G 1551/3A- or -V.A.G 1551/3B-
t  Hand multimeter (e.g. -V.A.G 1526 A-)
t  Adapter cable set (e.g. -V.A.G 1594 A-)
t  Test box -V.A.G 1598/31-
Test condition
l  Battery voltage at least 11.5 volts
Check for proper operation
–  Remove lower part of the dash panel insert on the driver's side → Body Work; Rep. Gr.70.
–  Connect vehicle system tester -V.A.G 1552-. Switch ignition on and select “address word” 01 Engine electronics → Chapter.
–  Initiate an actuator diagnosis → Chapter and actuate the fuel pump relay -J17-.
The fuel pump relay must be activated and the fuel pump must run.
If the relay is not activated:
–  Test control of fuel pump relay -J17- → Anchor.
If the fuel pump does not run:
–  Check power supply of fuel pump and connected components (via the fuel pump relay) → Anchor.
–  Testing fuel pump → 1.0/37; 1.4/44; 1.4/50 Engine -Mechanics; Rep. Gr.20.
Test control
–  Switch off ignition.
–  Connect test box -V.A.G 1598/31 - to the wiring loom on the engine control unit → Chapter.
–  Using an adapter cable from -V.A.G 1594 A- interconnect bush 80 and bush 2 of the test box.
–  Switch on ignition.
The fuel pump relay must be activated.
If the relay is now activated but did not open during the final control diagnosis:
–  Replacing engine control unit → Chapter.
If the relay is not activated:
–  Switch off ignition.
–  Remove the fuel pump relay from the relay base.
   ► 01.00 plug location 1
   02.00 ► Plug location 2
  S97-1373
–  Connect the multimeter for voltage measurement consecutively to contact 2 ( ► 01.00) or contact 1 (02.00 ►) and earth as well as contact 4 ( ► 01.00) or contact 3 (02.00 ►) and the earth of the relay carrier.
–  Switch on ignition.
   Specified value: approx. battery voltage
If the specified values are not reached:
–  Testing the wiring → Current flow diagrams and Fitting locations.
If the specified values are reached:
–  Switch off ignition.
  S24-0438
–  Check the following wire for interruption or short-circuit to earth or positive:
  S24-0438
Relay carrier in left driver's footwell,
plug location, contact
Test box -V.A.G 1598/31-
contact
► 01.00180
02.00 ►580

–  If necessary eliminate wire interruption or short-circuit.
–  If the wiring is O.K. replace the fuel pump relay -J17-.
Inspecting voltage supply on fuel pump and components
   
–  Pull out fuses No. 9, 24, 35 and 61 from the fuse holder.
–  Initiate an actuator diagnosis → Chapter and actuate the fuel pump relay -J17-.
–  Connect the multimeter for voltage measurement to earth and to a contact of the following fuses in the fuse holder.
  S01-0094
Retaining clipNominal value on one of the contacts 
9approx. battery voltage 
24approx. battery voltage
35approx. battery voltage
61approx. battery voltage

If the specified values are not reached:
–  Repeat test on the other contact of the fuse base.
If the nominal values are again not reached:
–  Testing the wiring → Current flow diagrams and Fitting locations.
–  If the wiring is O.K. replace the fuel pump relay -J17-.
–  Re-insert the fuses.
   

Drive unit > 1.0/37; 1.4/44; 1.4/50 Drive Unit, Fuel injection > Mixture preparation system, electronic inj.,Gas > Testing components > Testing fuel pump relay J17

< PREV PAGE NEXT PAGE >