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DTC Description
 
 
DTC DETECTION LOGIC
DTCM.U.T.-III SE screen terms
(Trouble diagnosis content)
DTC detection condition
P010100MAF SEN/CIRCUIT-B1
(Mass or Volume Air Flow Sensor A Circuit Range/Performance)
ADiagnosis conditionIgnition switch ON
Signal (terminal)—
ThresholdMass air flow sensor output flow rate is excessively low or high.
Diagnosis delay time0.3 second
BDiagnosis conditionEngine is running
Signal (terminal)—
ThresholdMass air flow sensor output flow rate is higher or lower compared with flow rate estimated by ECM.
Diagnosis delay time5 seconds
 
 
POSSIBLE CAUSE
  • Harness or connectors
    • Mass air flow sensor circuit is open or shorted.
    • Sensor power supply 1 is shorted.
  • Mass air flow sensor
  • Electric throttle control actuator
  • PCV hose air leak
  • Purge hose air leak
 
 
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.
Engine output controlECM reduces the engine output, according to the rise in engine speed. This reduces the vehicle speed to encourage the driver to repair malfunction.
  • Driving at 70 km/h (44 MPH) or more is possible.
noteThis value is a reference value converted from engine power to vehicle speed. Actual power limitation value differs due to the malfunctioning part and driving condition.
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 modeStratified charge combustion control at startingNo stratified charge combustion at starting (cold start).
Ignition timing correction controlPartially controls ignition timing control.
Retardation controlControls ignition timing delay control in the intermediate water temperature range.
or
Engine operating condition in fail-safe mode
Fail safe modeVehicle behavior
Traveling control modeEngine output controlECM reduces the engine output, according to the rise in engine speed. This reduces the vehicle speed to encourage the driver to repair malfunction.
  • Driving at 70 km/h (44 MPH) or more is possible.
noteThis value is a reference value converted from engine power to vehicle speed. Actual power limitation value differs due to the malfunctioning part and driving condition.
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 modeIgnition timing correction controlPartially controls ignition timing control.
Retardation controlControls ignition timing delay control in the intermediate water temperature range.
 
 
DTC Confirmation Procedure
1.CHECK DTC PRIORITY
If DTC P0101 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
Is applicable DTC detected?
Perform diagnosis of applicable. Refer to DTC Index.
.
 
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 engine and warm it up to normal operating temperature.
  2. Drive the vehicle for at least 5 seconds under the following conditions:
    cautionAlways drive vehicle at safe speed.
    Selector leverSuitable position
    Vehicle speed40 km/h (25 MPH) or more
    note
    • The gear must be fixed while driving the vehicle.
    • Keep the accelerator pedal as steady as possible during cruising.
  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