Evaporative Purge Regulator Valve, Checking

Observe all safety precautions: SAFETY PRECAUTIONS

View clean working conditions: CLEAN WORKING CONDITIONS

Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.

For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.

Special Tools And Workshop Equipment Required 

• multimeter
• Wiring diagram.

Test requirements

• The Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- fuse SA 11 OK.
• The ignition switched off.

Test procedure

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

Start diagnosis

-- Remove the engine cover with air filter. Refer to appropriate service information.

-- Disconnect the Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical harness connector -1-.

Checking internal resistance

-- Key in off position.

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

Specified value: 22.0 to 30.0 Ω.

If the specified value is 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 2 for voltage.

-- Turn key on.

-- Operate the starter briefly.

Specified value: battery voltage.

If the specified value was not obtained:

-- Using a multimeter, check the electrical harness connector terminal 1 for voltage.

Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical harness connector terminal	Measure to
1	Engine Ground (GND)

If the specified value is not obtained:

-- Check the wiring connection from the electrical harness connector terminal 1 to the Engine Component Power Supply Relay -J757- terminal 2/87 for 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:

Check Ground (GND) activation

-- Using a multimeter, check the electrical harness connector for voltage.

Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical harness connector terminal	Measure to
2	Battery positive (+)

-- Operate the starter briefly.

Specified value: battery voltage.

-- Switch the ignition off.

If the specified value was not obtained:

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 Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information.

-- Using a multimeter, check the Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical connector terminal 2 to Motronic Engine Control Module (ECM) -J623- electrical connector T91 for an open circuit.

Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- electrical harness connector terminal	Motronic Engine Control Module (ECM) -J623- electrical connector T91 terminal test box socket
2	88

Specified value: 1.5 Ω max.

If the specification is not obtained:

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

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

-- If necessary, repair the wiring connection.

If the specification was obtained:

-- Replace the Motronic Engine Control Module (ECM) -J623-. Refer to appropriate service information.

-- Install the engine cover with air filter. Refer to appropriate service information.

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 .