Volkswagen Golf / Golf GTI / Jetta. Manual - part 83

20-52

 

  

  

-  Generate readiness code again if DTC memory 

has been erased or engine control module 
separated from permanent positive supply: 

  

  

 

Repair Manual, 2.8 Liter VR6 4V Fuel Injection 

& Ignition, Engine Code(s): BDF, Repair Group 
01

 

  

   If no DTC is stored in DTC memory:  

  

  

-  Press keys 0 and 6 for function "End output" and 

confirm entry with Q key. 

  

  

-  Switch ignition off. 

  

  

-  Check that fuel tank cap is completely closed or 

if seal is leaking, replace as necessary. 

  

  

-  Repeat functional check. 

  

   If fault is still present:  

  

  

-  Check that fuel delivery unit union nut is tight or 

if seal is leaking replace as necessary, 

 

Page 

20-15

 , Removing and installing fuel delivery 

unit. 

  

  

-  Repeat functional check. 

  

   If fault is still present:  

Evaporative Emissions (EVAP) system

20-53

 

  

  

-  Remove rear right wheel housing liner: 

  

  

 

Repair Manual, Body Exterior, Repair Group 

66

 

  

  

-  Check to see if pressure hose between LDP and 

EVAP canister is leaking 

 

Page 20-43

 , item - 

8 - and replace if necessary. 

  

  

-  Check lines and line connections between EVAP 

canister and fuel tank flap unit or tank breather 
valve for leaks 

 

Page 20-44

 , Assembly 

overview of EVAP system. 

  

  

-  Repeat functional check. 

  

   If fault is still present:  

  

  

-  Remove EVAP canister and check for cracks 

and leaks, replace if necessary 

 

Page 20-41

 , 

Servicing components of EVAP system. 

  

  

-  Repeat functional check. 

Evaporative Emissions (EVAP) system

20-54

 

  

  

EVAP canister purge regulator 
valve -N80-, checking 

 

  

  

In a no-current situation the solenoid 
valve is closed.  

  

  

Special tools and equipment  

    

Note:  

All functions which could previously 
be performed with V.A.G 1551/1552 
can also be performed with the new 
tester VAS 5051. 

Test conditions  

 V.A.G 1551 Scan Tool (or 

vehicle system tester V.A.G 
1552) with cable VAG 1551/3 

    

 The fuses must be OK. 

 Battery voltage must be at least 

11.5 V. 

 All electrical consumers, e.g. 

lights and rear window defroster 
must be switched off. 

 If the vehicle is equipped with air 

conditioning, this must be 
switched off. 

Evaporative Emissions (EVAP) system

20-55

 

  

  

 Selector lever must be in position "P" or "N" 

on models with an automatic transmission. 

  

  

 Fuel pump relay -J17- must be OK, 

checking: 

  

  

 Electrical Wiring Diagrams, Troubleshooting & 

Component Locations 

  

  

 No DTCs may be stored in DTC memory: 

  

  

 

Repair Manual, 2.8 Liter VR6 4V Fuel Injection 

& Ignition, Engine Code(s): BDF, Repair Group 
01

 

  

   Checking activation  

  

  

-  Check activation of EVAP canister purge 

regulator valve -N80- via output Diagnostic Test 
Mode (DTM): 

  

  

 

Repair Manual, 2.8 Liter VR6 4V Fuel Injection 

& Ignition, Engine Code(s): BDF, Repair Group 
01

 

  

   If activation is OK:  

  

  

-  Perform functional check 

 

Page 20-56

 . 

Evaporative Emissions (EVAP) system