Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0444, P0445 EVAP canister purge volume control solenoid valve
Diagnosis Procedure

1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
  3. Turn ignition switch ON.
  4. Check the voltage between EVAP canister purge volume control solenoid valve harness connector and ground.

Is the inspection result normal?

YES >> GO TO 3.

NO >> GO TO 2.

2.DETECT MALFUNCTIONING PART

Check the following.

  • Harness connector E55, F55
  • Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
  • Harness for open or short between EVAP canister purge volume control solenoid valve and ECM

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between EVAP canister purge volume control solenoid valve harness connector and ECM harness connector. 
  4. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES1 >> With CONSULT: GO TO 4.

YES2 >> Without CONSULT: GO TO 5.

NO >> Repair open circuit or short to ground or short to power in harness or connectors.

4.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT

  1. Reconnect all harness connectors disconnected.
  2. Start engine.
  3. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT. Check that engine speed varies according to the valve opening.

Does engine speed vary according to the valve opening?

YES >> GO TO 6.

NO >> GO TO 5.

5.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to EC, "Component Inspection".

Is the inspection result normal?

YES >> GO TO 6.

NO >> Replace EVAP canister purge volume control solenoid valve. Refer to EM, "Removal and Installation".

6.CHECK INTERMITTENT INCIDENT

Refer to GI, "Intermittent Incident".

>> INSPECTION END

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