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Diagnosis Procedure
1.CHECK DTC PRIORITY
If DTC P044A is displayed with DTC P06B0, first perform trouble diagnosis for DTC P06B0.
Is applicable DTC detected?
Perform diagnosis of applicable. Refer to DTC Description.
.
 
2.CHECK EGR VOLUME CONTROL VALVE POSITION SENSOR POWER SUPPLY CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect EGR volume control valve harness connector.
  3. Turn ignition switch ON.
  4. Check voltage between EGR volume control valve harness connector and ground.
    +−Voltage
    (Approx.)
    EGR volume control valve
    ConnectorTerminal
    F813Ground5 V
Is the inspection result normal?
.
Perform the trouble diagnosis for power supply circuit.
 
3.CHECK EGR VOLUME CONTROL VALVE POSITION SENSOR GROUND CIRCUIT
  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check harness continuity between EGR volume control valve harness connector and ECM harness connector.
    EGR volume control valveECMContinuity
    ConnectorTerminalConnectorTerminal
    F812F52107Existed
  4. Also check harness for short to ground and short to power.
Is the inspection result normal?
.
Repair or replace error-detected parts.
 
4.CHECK EGR VOLUME CONTROL VALVE POSITION SENSOR INPUT SIGNAL CIRCUIT
  1. Check harness continuity between EGR volume control valve harness connector and ECM harness connector.
    EGR volume control valveECMContinuity
    ConnectorTerminalConnectorTerminal
    F811F52116Existed
  2. Also check harness for short to ground and short to power.
Is the inspection result normal?
.
Repair or replace error-detected parts.
 
5.CHECK EGR VOLUME CONTROL VALVE
Check the EGR volume control valve. Refer to Component InspectionComponent Inspection (EGR Volume Control Valve).
Is the inspection result normal?
Check intermittent incident. Refer to Intermittent IncidentIntermittent Incident.
Replace EGR volume control valve. Refer to Removal and Installation.