Description
Refer to dtc p0100 (see page es-86).
Monitor description
The maf meter is a sensor that measures the amount of air flowing through the throttle valve. The ecm uses this information to determine the fuel injection time and to provide an appropriate air-fuel ratio. Inside the maf meter, there is a heated platinum wire which is exposed to the flow of intake air. By applying a specific electrical current to the wire, the ecm heats it to a specific temperature. The flow of incoming air cools both the wire and an internal thermistor, affecting their resistance. To maintain a constant current value, the ecm varies the voltage applied to these components of the maf meter. The voltage level is proportional to the airflow through the sensor, and the ecm uses it to calculate the intake air volume.
The ecm monitors the average engine load value ratio to check the maf meter for malfunctions. The average engine load value ratio is obtained by comparing the average engine load calculated from the maf meter output to the average engine load estimated from the driving conditions, such as the engine speed and the throttle opening angle. If the average engine load value ratio is below the threshold value, the ecm determines that the intake air volume is low, and if the average engine load value ratio is above the threshold value, the ecm determines that the intake air volume is high.
If this is detected in 2 consecutive driving cycles, the mil is illuminated and a dtc is set.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Wiring diagram
Refer to dtc p0100 (see page es-88).
Confirmation driving pattern
Hint:
Performing this confirmation pattern will activate the mass air flow performance monitor.
Inspection procedure
Hint:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
Hint:
If any dtcs other than p0101 are output, troubleshoot those dtcs first.
Ok:
No leakage from air induction system.
Ok:
Pcv hose is connected correctly and is not damaged.
Replace mass air flow meter
Terminals of ecu (2005/11-2006/01)
Check air conditioning amplifier
Measure the voltage and resistance of the
connectors.
Hint:
Check from the rear of the connector while it is
connected to the air conditioning amplifier.
using an oscilloscope, check waveform 1.
Can communication signal
Hint:
...
Eps warning light circuit
Description
If the power steering ecu detects a malfunction, the p/s warning light comes
on. At this time, the power
steering ecu stores a dtc in its memory.
Wiring diagram
Inspection procedure
Check for dtc
Using the intelligent tester (with can vim), check for
dtcs and confir ...
Digital Rear-view Mirror
The Digital Rear-view Mirror
is a system that uses the
camera on the rear of the
vehicle and displays its
image on the display of the
Digital Rear-view Mirror.
The Digital Rear-view Mirror
can be changed between
optical mirror mode and digital
mirror mode by operating
the lever.
The Digital Rear-v ...