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

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2005 Volkswagen GTI, 2004 Volkswagen R32, 2004 Volkswagen Jetta, 2004 Volkswagen GTI, and 2003 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

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-

NOTE: Before disconnecting harness connectors, mark allocation to component.

Fig 3: Checking Resistance Between Terminals Of Respective Valve

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check resistance between terminals of the respective valve for camshaft adjustment.

Specified value: 10.0 to 18.0 Ω

If specified value is not obtained:

Replace control housing for camshaft adjustment. Refer to Parts of ignition (vehicles with engine codes BDF and BJS), removing and installing , item 3
Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
Generate readiness code. Refer to Readiness code, generating

If specified value is obtained:

Check wires to Engine Control Module (ECM) according to wiring diagram. Refer to Checking wires to Engine Control Module (ECM) .