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Home >> Volkswagen >> 2014 >> Passat S, 2.5L Eng VIN P, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> 2.5L - Generic Scan Tool - Engine Code(S): CBTA & CBUA >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> EVAP Purge Regulator Valve, Checking >> Test Procedure
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Test Procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK 

Start diagnosis

etc.)

-- Remove the engine cover with air filter. Refer to the Repair Information.

-- Disconnect the Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical harness connector.

Checking internal resistance

-- Using a multimeter, check the Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- terminals 1 and 2 for resistance.

Specified value: 15.0 to 22.0 Ω.

If the specified value was Not obtained:

-- Replace the Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-.

If the specification is obtained:

Checking voltage supply

-- Using a multimeter, check the purge valve electrical harness connector terminal 1 to 2 for voltage.

-- Turn ignition switch ON.

Specified value: 8.60 volts +/- 2 volts.

Turn the ignition switch OFF.

If the specified value was Not obtained:

-- Leave the multimeter positive lead on terminal 1 and connect the multimeter negative lead to engine ground.

-- Ignition switch ON.

Specified value: Battery Voltage.

Turn the ignition switch OFF.

If the specified value was Not obtained:

-- Check the circuit from the EVAP solenoid terminal 2 to power source for open or high resistance. Refer to Wiring Diagrams for power supply detail.

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the wiring connection.

If the specified value was obtained:

Check Ground activation

-- Remove the Engine Control Module (ECM) -J623-. Refer to the Repair Information.

-- Using a multimeter, check the Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical connector terminal 2 to Engine Control Module (ECM) -J623- electrical connector T60 terminal 32 for an open circuit. Refer to Wiring Diagrams for pin locations.

Specified value: 1.5 Ω max.

If the specified value was Not obtained:

-- Check the wiring for a short to voltage, high resistance or an open circuit.

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the wiring connection.

If the specified value was obtained:

-- Replace the Engine Control Module (ECM) -J623-. Refer to the Repair Information.

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