Camshaft Adjusting Valves, Checking

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.

Special tools and workshop equipment required

Multimeter VAG1526 or multimeter VAG1715
Connector test kit VAG1594
Wiring diagram

Test requirements

Respective fuses of camshaft adjustment valves in fuse box (instrument panel, left) must be OK: Refer to SYSTEM WIRING DIAGRAM

Fig 1: Identifying Fuse Box (Instrument Panel, Left)
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Ignition switched off.

Test sequence

Cylinder bank 1

-- Disconnect 2-pin connector from Valve -1- for camshaft adjustment -N205- (arrow).

Fig 2: Disconnecting 2-Pin Connector From Valve For Camshaft Adjustment -N205-

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Cylinder bank 2

-- Disconnect 2-pin connector from Valve -2- for camshaft adjustment -N208- (arrow).

Fig 3: Disconnecting 2-Pin Connector From Valve For Camshaft Adjustment -N208-

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Cylinder bank 1 and 2

NOTE:

Cylinder bank 1 = in direction of travel, right.

Cylinder bank 2 = in driving direction, left.

Checking resistances

-- Measure resistance between terminals of the respective valve for camshaft adjustment.

Fig 4: Checking Resistance Between Terminals Of Respective Valve

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Specified value: 10.0 to 18.0 Ω

If specified value is not obtained:

-- Replace the camshaft adjuster with the respective Valve -1- for camshaft adjustment -N205- / Valve -2- for camshaft adjustment -N208- :

-- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.

-- Generate readiness code.

If specified value is obtained:

-- Check wires according to wiring diagram.

Checking wiring

-- Connect test box to control module wiring harness, connect test box for wiring test.

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

Fig 5: 2-Pin Electrical Harness Connector & Terminals

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Wire resistance: max. 1.5 Ω

Cylinder bank 1

Component	Connector	Test box
Valve -1- for camshaft adjustment -N205-	Terminal 2	Socket 115

Cylinder bank 2

Component	Connector	Test box
Valve -2- for camshaft adjustment -N208-	Terminal 2	Socket 120

Cylinder bank 1 and 2

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

Specified value: ∞ Ω

-- Check wire between 2-pin connector terminal 1 and Motronic Engine Control Module (ECM) Power Supply Relay -J271- for open circuit according to wiring diagram.

Fig 6: 2-Pin Electrical Harness Connector & Terminals

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Wire resistance: max. 1.5 Ω

-- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.

-- Generate readiness code.

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

-- Replace Motronic Engine Control Module (ECM) -J220- ENGINE CONTROL MODULE, REPLACING .