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DTC Description
 
 
DTC DETECTION LOGIC
DTCM.U.T.-III SE screen terms
(Trouble diagnosis content)
DTC detection condition
P040400EGR A CONTROL
(EGR A control circuit range/performance)
ADiagnosis condition—
Signal (terminal)EGR volume control valve signal
ThresholdECM detects that the current sent to the EGR volume control valve motor is equal to or more than the threshold value for 2 seconds or more under the condition that the target angle of EGR volume control valve is constant.
Diagnosis delay time—
BDiagnosis condition—
Signal (terminal)EGR volume control valve signal
ThresholdECM detects that the difference between the target angle of EGR volume control valve and actual valve angle is equal to or more than the threshold value for 5 seconds or more.
Diagnosis delay time—
 
 
POSSIBLE CAUSE
  • EGR volume control valve
  • Foreigh objects interferes with EGR volume control valve
 
 
FAIL-SAFE
Engine operating condition in fail-safe mode
Fail safe modeVehicle behavior
Traveling control modeAccelerator angle variation controlECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction.
noteECM does not control the accelerator pedal releasing speed.
Device fix mode
  • This mode fixes the electric IVT motor and the EVT control solenoid valve in the reference position.
  • The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).
  • A control signals is not transmitted to EGR volume control valve and the EGR volume control is deactivated.
Combustion control modeIdle speed controlStops feedback control of idle speed and controls with specified speed.
Recovery speed control at deceleratingStops recovery speed control by the fuel cut at decelerating and controls with specified speed.
Idle neutral controlStops idle neutral control.
 
 
DTC Confirmation Procedure
1.CHECK DTC PRIORITY
If DTC P0404 is displayed with DTC P044A or P044E, first perform trouble diagnosis for DTC P044A or P044E.
Is applicable DTC detected?
Perform diagnosis of applicable.
.
 
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.
: .
 
3.PERFORM DTC CONFIRMATION PROCEDURE
  1. Start the engine when the following conditions are met.
    Intake air temperature0°C (32°F) or more
    Engine coolant temperature75°C (167°F) or more
  2. Drive the vehicle at 50 km/h (32 MPH) or more for at least 5 seconds.
  3. Check 1st trip DTC.
Is 1st trip DTC detected?
Proceed to DTC Diagnosis Procedure.
-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident.
-2Confirmation after repair: INSPECTION END