Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0453 EVAP control system pressure sensor
Diagnosis Procedure

1.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER

  1. Turn ignition switch OFF.
  2. Disconnect EVAP control system pressure sensor harness connector.
  3. Check sensor harness connector for water.

Water should not exist.

Is the inspection result normal?

YES >> GO TO 2.

NO >> Repair or replace harness connector.

2.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY

  1. Turn ignition switch ON.
  2. Check the voltage between EVAP control system pressure sensor harness connector and ground. 

Is the inspection result normal?

YES >> GO TO 6.

NO >> GO TO 3.

3.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector. 
  4. Also check harness for short to ground and to power.

Is the inspection result normal?

YES >> GO TO 4.

NO >> Repair or replace errordetected parts

4.CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals. 

*: With A/C models

Is the inspection result normal?

YES >> GO TO 5.

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

5.CHECK COMPONENTS

Check the following.

  • Battery current sensor (Refer to EC, "Component Inspection").
  • CKP sensor (POS) (Refer to EC, "Component Inspection").
  • Refrigerant pressure sensor (Refer to EC, "Component Function Check").
  • Accelerator pedal position sensor (Refer to EC, "Component Inspection").

Is the inspection result normal?

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

NO >> Replace malfunctioning component.

6.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector. 
  4. Also check harness for short to power.

Is the inspection result normal?

YES >> GO TO 7.

NO >> Repair or replace errordetected parts.

7.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR SIGNAL CIRCUIT

    1.   Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

    2.   Also check harness for short to ground and to power.

Is the inspection result normal?

YES >> GO TO 8.

NO >> Repair or replace errordetected parts.

8.CHECK RUBBER TUBE

  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, repair or replace rubber tube.

9.CHECK 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 EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to EC, "Component Inspection".

Is the inspection result normal?

YES >> GO TO 11.

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

11.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 the EVAP canister.

Does water drain from EVAP canister?

YES >> GO TO 12.

NO >> Check intermittent incident. Refer to GI45, "Intermittent Incident".

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

12.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 13.

13.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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