RS 4 Quattro Sedan V8-4.2L (BNS) (2007)
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Canister Purge Control Valve: Testing and Inspection
EVAP Canister Purge Regulator Valve, Checking
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› The Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) fuse OK.
‹› The ignition switched off.
‹› Voltage for the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) is supplied by the Engine Component Power Supply Relay
(J757).
Test procedure
-
Perform a preliminary check to verify the customers complaint. Refer to => [ General Diagnosis ] See: Computers and Control Systems/Testing
and Inspection/Initial Inspection and Diagnostic Overview/General Diagnosis.
Start diagnosis
-
Disconnect the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) electrical harness connector - 2 -.
Checking internal resistance
-
Using a Multimeter, check the resistance between terminals 1 and 2 of the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80).
