Camshaft adjustment valves, 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

Requirements

Fig 1: Identifying Main Fuse Panel

Courtesy of VOLKSWAGEN UNITED STATES, INC.

The respective fuses of the valves for camshaft adjustment must be OK:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

Fig 2: Identifying Relays And Fuses In Protective Housing (Left Side Of Plenum Chamber)

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fuses -1, 2, 3, 4 and 7- in protective housing (plenum chamber, left) must be OK:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

Battery voltage must be at least 11.5 Volts.
All electrical consumers, e.g. lights and rear window defroster, must be switched off.
Parking brake must be engaged or else daylight driving lights will be switched on.
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.

Work sequence

Cylinder bank 1

Fig 3: Identifying Camshaft Position (CMP) Sensors & Camshaft Adjustment Valve Connectors

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect 2-pin harness connector to respective valve for camshaft adjustment:

2 - Valve 1 for camshaft adjustment -N205-

3 - Camshaft Adjustment Valve 1 (exhaust) -N318-

Cylinder bank 2

Fig 4: Identifying Camshaft Position (CMP) Sensors & Camshaft Adjustment Valve Connectors

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect 2-pin harness connector to respective valve for camshaft adjustment:

2 - Camshaft Adjustment Valve 2 (exhaust) -N319-

3 - Valve 2 for camshaft adjustment -N208-

Cylinder bank 1 and 2

NOTE:

Cylinder bank 1 = in driving direction, right
Cylinder bank 2 = in driving direction, left
Before disconnecting harness connectors, mark allocation to component.

Checking resistances

Measure resistance between terminals at connector to respective valve for camshaft adjustment.

Specified value: 10.0 to 18.0 Ω

If specified value is not obtained:

Replace respective control housing with two valves for camshaft adjustment. Refer to Control housing, disassembling and assembling .
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:

Checking wiring

Connect test box to control module wiring harness. Refer to Test box, connecting for wiring test .

Fig 5: Identifying 2-Pin Harness Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check wires between test box and 2-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.

Wire resistance: max. 1.5 Ω

Cylinder bank 1

Component	Connector	Test box
Valve 1 for camshaft adjustment -N205-	Terminal 2	Socket 115
Camshaft Adjustment Valve 1 (exhaust) -N318-	Terminal 2	Socket 22

Cylinder bank 2

Component	Connector	Test box
Valve 2 for camshaft adjustment -N208-	Terminal 2	Socket 120
Camshaft Adjustment Valve 2 (exhaust) -N319-	Terminal 2	Socket 18

Cylinder bank 1 and 2

Also check wires for short circuit to B+ and Ground (GND).

Specified value: ∞ Ω

Fig 6: Identifying 2-Pin Harness Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check wire between 1-pin connector terminal 2 and relay carrier for open circuit according to wiring diagram.

Wire resistance: max. 1.5 Ω

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 no malfunctions are detected in the wires and the resistance value is OK:

Replace Motronic Engine Control Module (ECM) -J220-. Refer to Engine Control Module (ECM), replacing .