DTC Description

DTC DETECTION LOGIC

DTC		M.U.T.-III SE screen terms (Trouble diagnosis content)	DTC detection condition
P0102	00	MAF SEN/CIRCUIT-B1 (Mass or volume air flow sensor "A" circuit low)	Diagnosis condition	Engine running at idle
			Signal (terminal)	Mass air flow sensor signal
			Threshold	An excessively low voltage from the sensor is sent to ECM
			Diagnosis delay time	—

POSSIBLE CAUSE

Harness or connectors (The mass air flow sensor circuit is open or shorted.)
Intake air leaks
Mass air flow sensor

FAIL-SAFE

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Traveling control mode

Accelerator angle variation control

ECM 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.

note	ECM does not control the accelerator pedal releasing speed.

Engine output control

ECM 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.

note	This 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 mode

Stratified charge combustion control at starting

No stratified charge combustion at starting (cold start).

Ignition timing correction control

Partially controls ignition timing control.

Retardation control

Controls ignition timing delay control in the intermediate water temperature range.

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Traveling control mode

Engine output control

ECM 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.

note	This 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 mode

Ignition timing correction control

Partially controls ignition timing control.

Retardation control

Controls ignition timing delay control in the intermediate water temperature range.

DTC Confirmation Procedure

1.CHECK DTC PRIORITY

If DTC P0102 is displayed with DTC P06B0, first perform the trouble diagnosis for DTC P06B0.

Is applicable DTC detected?

Perform diagnosis of applicable. Refer to DTC Description

2.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Turn ignition switch OFF and wait at least 10 seconds.

3.PERFORM DTC CONFIRMATION PROCEDURE

Start engine and wait at least 5 seconds.
Check DTC.

Is DTC detected?

Proceed to DTC Diagnosis Procedure

-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident

-2Confirmation after repair: INSPECTION END