Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0443 EVAP canister purge volume control solenoid valve
Diagnosis Procedure

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

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

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

Is the inspection result normal?

YES >> Perform the trouble diagnosis for power supply circuit.

NO >> Repair or replace errordetected parts.

3.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE GROUND CIRCUIT

  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 power.

Is the inspection result normal?

YES >> GO TO 4.

NO >> Repair or replace errordetected parts.

4.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

  1. Disconnect EVAP control system pressure sensor harness connector.
  2. Check connectors for water.

Is the inspection result normal?

YES >> GO TO 5.

NO >> Replace EVAP control system pressure sensor. Refer to FL, "Removal and Installation".

5.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Check the EVAP control system pressure sensor. Refer to EC, "Component Inspection".

Is the inspection result normal?

YES1 >> With CONSULT: GO TO 6.

YES2 >> Without CONSULT: GO TO 7.

NO >> Replace EVAP control system pressure sensor. Refrt to FL, "Removal and Installation".

6.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT

  1. Turn ignition switch OFF.
  2. Reconnect harness connectors disconnected.
  3. Start engine.
  4. Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode of "ENGINE" using CONSULT. Check that engine speed varies according to the valve opening.

Is the inspection result normal?

YES >> GO TO 8.

NO >> GO TO 7.

7.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Check the EVAP canister purge volume control solenoid valve. Refer to EC, "Component Inspection".

Is the inspection result normal?

YES >> GO TO 8.

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

8.CHECK RUBBER TUBE FOR CLOGGING

  1. Disconnect rubber tube connected to EVAP canister vent control valve.
  2. Check the rubber tube for clogging.

Is the inspection result normal?

YES >> GO TO 9.

NO >> Clean the rubber tube using an air blower.

9.CHECK EVAP CANISTER VENT CONTROL VALVE

Check the EVAP canister vent control valve. Refer to EC, "Component Inspection".

Is the inspection result normal?

YES >> GO TO 10.

NO >> Replace EVAP canister vent control valve. Refer to FL, "Removal and Installation".

10.CHECK IF EVAP CANISTER IS SATURATED WITH WATER

  1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
  2. Check if water will drain from EVAP canister.

Does water drain from the EVAP canister?

YES >> GO TO 11.

NO >> Check intermittent incident. Refer to GI, "Intermittent Incident".

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

11.CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.

The weight should be less than 1.6 kg (3.5 lb).

Is the inspection result normal?

YES >> Check intermittent incident. Refer to GI, "Intermittent Incident".

NO >> GO TO 12.

12.DETECT MALFUNCTIONING PART

Check the following.

  • EVAP canister for damage
  • EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

>> Repair hose or replace EVAP canister. Refer to FL, "Removal and Installation".

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