Valves for camshaft adjustment (vehicles with engine codes BDF and BJS), checking: Notes

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 

• V.A.G 1526 multimeter or V.A.G 1715 multimeter
• V.A.G 1594 connector test kit
• Wiring diagram

Test requirements 

Fig 1: Identifying Main Fuse Panel

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• The respective fuses of the Valve 1 for camshaft adjustment -N205- and Camshaft Adjustment Valve 1 (exhaust) -N318- must be OK:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

• Motronic Engine Control Module (ECM) Power Supply Relay -J271- must be OK, check:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

• Battery voltage must be at least 11.5 volts.
• All electrical consumers such as, for example, lights and rear window defroster 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 -P-.

• Ground (GND) connections between engine and chassis must be OK.
• Ignition switched off.

Test sequence 

Fig 2: Valve 1 For Camshaft Adjustment -N205- & Camshaft Adjustment Valve 1 (Exhaust) -N318-

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• 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-