DTC P0100 MASS AIR FLOW SENSOR (MAFS); Component Description; CONSULT-II Reference Value; ECM Terminals and Reference Value; On Board Diagnosis Logic
EF & EC-7076spec tableCAUTION typos verbatim from source ('grond', 'transistor' singular).
CG10, CGA3
Component Description
The mass air flow sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the ECM. The temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change.
CONSULT-II Reference Value in Data Monitor Mode
Specification data are reference values.
CONSULT-II Reference Values — MAFS Data Monitor
MAS A/F SE-B1
ConditionEngine: After warming up
Air conditioner switch: "OFF"
Shift lever: "N"
No-load
[Idle]
Specification1.0 - 1.7 V
MAS A/F SE-B1
ConditionEngine: After warming up
Air conditioner switch: "OFF"
Shift lever: "N"
No-load
[2,500 rpm]
Specification1.5 - 2.1 V
CAL/LD VALUE
ConditionEngine: After warming up
Air conditioner switch: "OFF"
Shift lever: "N"
No-load
[Idle]
Specification15.0 - 30.0 %
CAL/LD VALUE
ConditionEngine: After warming up
Air conditioner switch: "OFF"
Shift lever: "N"
No-load
[2,500 rpm]
Specification13.0 - 30.0 %
MASS AIRFLOW
ConditionEngine: After warming up
Air conditioner switch: "OFF"
Shift lever: "N"
No-load
[Idle]
Specification2.0 - 5.0 g·m/s
MASS AIRFLOW
ConditionEngine: After warming up
Air conditioner switch: "OFF"
Shift lever: "N"
No-load
[2,500 rpm]
Specification6.0 - 12.0 g·m/s
ECM Terminals and Reference Value
Specification data are reference values and are measured between each terminal and ground.
CAUTION
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a grond other than ECM terminals, such as the ground.
ECM Terminals — Mass Air Flow Sensor
41
Wire colorG
ItemMass air flow sensor
Condition[Engine is running]
- Warm-up condition
- Idle speed
Data (DC Voltage)1.0 - 1.7 V
41
Wire colorG
ItemMass air flow sensor
Condition[Engine is running]
- Warm-up condition
- Engine speed is 2,500 rpm
Data (DC Voltage)1.5 - 2.1 V
14
Wire colorB/W
ItemMass air flow sensor ground
Condition[Engine is running]
- Warm-up condition
- Idle speed
Data (DC Voltage)Approximately 0 V