A8 Quattro Sedan V8-4.2L (BGK) (2006)
Canister Purge Solenoid: Testing and Inspection
EVAP Canister Purge Solenoid Valve 2, Electrical Testing
Component location: In rear left wheel housing under wheel housing liner
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Disconnect connector at Evaporative Emission (EVAP) Canister Purge Solenoid Valve 2 (N115).
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Perform a resistance measurement between terminals on valve using portable multimeter (VAG1526).
Specified value: 20 to 35 ohms
If specified value is not reached, replace Evaporative Emission (EVAP) Canister Purge Regulator Valve.
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Read readiness code => [ Readiness Code, Reading ] See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles
and Readiness Codes. If DTC memory was erased, readiness code must be generated again => [ Readiness Code, Generating ] See: Computers and
Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If specified value is obtained, check voltage supply.
Voltage Supply, Checking
Test Prerequisite
‹› Fuse for Evaporative Emission (EVAP) Canister Purge Solenoid Valve 2 (N115) (in relay- and fuse holder in instrument panel, right side) OK.
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Disconnect connector at Evaporative Emission (EVAP) Canister Purge Solenoid Valve (N115).
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Connect voltage test lamp (VAG1527) between terminal 1 of connector and engine Ground (GND):
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Switch ignition on.
LED must light up.
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If LED does not light up, check wire connection from terminal 1 via fuse for Evaporative Emission (EVAP) Canister Purge Solenoid Valve
(N115) (relay- and fuse holder in instrument panel, right side) to Motronic Engine Control Module (ECM) Power Supply Relay (J271) (relay
carrier in E-box in plenum chamber) for open circuit.
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If voltage supply is OK, check wire connection.