EVAP Purge Regulator Valve, Checking

Special Tools And Workshop Equipment Required 

• Multimeter.
• Wiring diagram.

Test Requirements 

• The Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- fuse OK.
• The ignition switched OFF.

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.

-- 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 Appropriate System 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-.

-- 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 Appropriate System 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-.

Final Procedures 

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
2. If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
3. If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .