A8L Quattro Sedan W12-6.0L (BSB) (2005)
Air Injection Vacuum Control Solenoid Valve: Testing and Inspection
Diagnostic Procedures
Secondary Air Injection Solenoid Valves, Checking
Solenoid valves are closed when no voltage is present.
Test Conditions
‹› Motronic Engine Control Module (ECM) Power Supply Relay (J271) -position 4- must be OK, check:
‹› The Ground (GND) connections between engine and body must be OK.
‹› Ignition switched off.
‹› Fuses in right instrument panel fuse holder must be OK:
Right instrument panel fuse holder
Test Sequence
Special tools, testers and auxiliary items required
‹› Hand multimeter (V.A.G 1526) or Multimeter (V.A.G 1715)
‹› Test adapter kit (V.A.G 1594)
‹› Wiring diagram
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Disconnect corresponding 2-pin connector from Secondary Air Injection (AIR) solenoid valve to be tested:
‹› 2-pin connector from Secondary Air Injection (AIR) Solenoid Valve 2 (N320) on cylinder bank 2.
‹› Cylinder bank 2 with cylinders 7 through 12 is located at left in direction of travel.
‹› All mechanical procedures and exploded view illustrations with torque specifications,
Check resistance
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Check resistance between terminals of solenoid valve. Specification: 28.0 to 32.0 ohms