EVAP Canister Purge Regulator Valve, Checking

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 via the Engine Component Power Supply Relay (J757).

Test procedure

- Perform a preliminary check to verify the customers complaint. Refer to => [ General Diagnosis ] General Diagnosis.

Start diagnosis

- Remove the rear engine cover - arrows -.





- Disconnect the Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) electrical harness connector - 3 -.





Checking internal resistance

- 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 ohms.

Engine Component Power Supply Relay (J757)

- 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.





- 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 to Ground (GND) for voltage.









- Operate the starter briefly.

Specified value: battery voltage.

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 or short to Ground (GND).

- Check the electrical harness connector for damage, corrosion, lose 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. Refer to Fuel Injection and Ignition Repair Information.

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

- Remove the Engine Control Module (ECM) (J623 ). Refer to => [ ECM, Removing and Installing ] ECM, Removing and Installing.

- 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 T94 terminal 49 for an open circuit.









Specified value: 1.5 ohms max.

If the specification is not obtained:

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

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

- If necessary, repair the wiring connection.

If the specification was obtained:

- Replace the Engine Control Module (ECM) (J623 ). Refer to => [ ECM, Removing and Installing ] ECM, Removing and Installing.

- Install the rear engine cover - arrows -.





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 ] Diagnostic Mode 03 - Read DTC Memory.

2. If necessary, erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.

- End of diagnosis.