GTI V6-2.8L (BDF) (2002)
Variable Valve Timing Actuator: Testing and Inspection
With Generic Scan Tool
Valves For Camshaft Adjustment (Vehicles With Engine Code BDF), Checking
Function
The camshaft adjustment is load-and RPM dependent. The electrical valves for camshaft adjustment switch oil pressure onto camshaft adjusters
(mechanical adjustment mechanisms), which then adjust the camshafts.
Recommended special tools and equipment
-
VAG1526 multimeter or VAG1715 multimeter
-
VAG1594 connector test kit
-
Wiring diagram
Test requirements
-
The respective fuses of the Valve -1- for camshaft adjustment -N205-and Camshaft Adjustment Valve 1 (exhaust) -N318- must be OK.
-
Fuel Pump (FP) Relay -J17- must be OK, check.
-
Battery voltage must be at least 11.5 volts.
-
All electrical consumers like, for example, lights and rear window heating must be switched off.
-
Parking brake must be engaged or else daylight driving lights will be switched on.
-
For vehicles with automatic transmission, selector lever must be in position -P-or -N-.
-
If vehicle is equipped with an A/C system, it must be switched off.
-
Ground (GND) connections between engine and chassis must be OK.
-
Ignition switched off.
Test sequence
-
Disconnect 2-pin harness connector to the respective valve for camshaft adjustment:
1
-
Valve -1- for camshaft adjustment -N205-
2
-
Camshaft Adjustment Valve 1 (exhaust) -N318-
NOTE: Before disconnecting harness connectors, mark allocation to component.