EVAP Canister Purge Regulator Valve N80, Checking

Special tools and workshop equipment required 

• Multimeter.
• Wiring diagram.

Test requirements

• Fuse -SB38- OK.
• The ignition switched off.

Test procedure

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

Start diagnosis

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

Checking internal resistance

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

Specified value: 22, 0 to 30, 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 electrical harness connector terminal 1 to Ground (GND) for voltage.

-- Operate the starter briefly.

Specified value: battery voltage.

If the specified value was not obtained:

-- Check the wiring connection from the Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical harness connector terminal 1 to the Power Supply Relay (terminal 30, B+) -J317- terminal 87 for an open circuit a short circuit to Battery positive (+) or to Ground (GND).

-- 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 (GND) activation

If the manufacturers test box is being used. Perform the following step.

-- Install the test box.

If the manufacturers test box is not being used. Perform the following step.

-- Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE J623, REPLACING .

-- Using a Multimeter --, check the Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical connector terminal 2 to the Engine Control Module (ECM) -J623- electrical harness connector T121 terminal 64 for resistance.

Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- Electrical harness connector terminal	Engine Control Module (ECM) -J623- Electrical harness connector terminal or test box socket
2	64

Specified value: 1.5 Ω.

If the specification was not obtained:

-- Check the wiring for an open circuit, a short circuit to Battery positive (+) or to Ground (GND).

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

-- If necessary, repair the wiring connection.

If the specification was obtained:

-- Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .

-- Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to READINESS CODE DESCRIPTION .

-- End diagnosis.

If the DTC returns and no malfunction is found in the wiring and voltage supply was OK:

-- Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE J623, REPLACING .

-- Assembly is performed in the reverse of the removal.

Final procedures

After 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 .

End of diagnosis