Toyota 2GR-FE Manual page 290

ES–134
HINT:
When any of these DTCs are set, check the air-flow rate by entering the following menus on the intelligent
tester: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / MAF.
Mass Air Flow Rate (gm/s)
MONITOR DESCRIPTION
If there is a defect in the MAF meter or an open or short circuit, the voltage level deviates from the normal
operating range. The ECM interprets this deviation as a malfunction in the MAF meter and sets a DTC.
Example:
When the sensor output voltage remains less than 0.2 V, or more than 4.9 V, for more than 3 seconds, the
ECM sets a DTC.
ES
If the malfunction is not repaired successfully, a DTC is set 3 seconds after the engine is next started.
MONITOR STRATEGY
Related DTCs
Required Sensors/Components (Main)
Required Sensors/Components (Sub)
Frequency of Operation
Duration
MIL Operation
Sequence of Operation
TYPICAL ENABLING CONDITIONS
Monitor runs whenever following DTCs are not present
TYPICAL MALFUNCTION THRESHOLDS
P0100:
Mass air flow meter voltage
P0102:
Mass air flow meter voltage
P0103:
Mass air flow meter voltage
COMPONENT OPERATING RANGE
Mass air flow meter voltage
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
Approximately 0.0
271.0 or more
Malfunctions
• Open in Mass Air Flow (MAF) meter power source circuit
• Open or short in VG circuit
Open in EVG circuit
P0100: Mass air flow meter range check (Fluctuating)
P0102: Mass air flow meter range check (Low voltage)
P0103: Mass air flow meter range check (High voltage)
MAF meter
Crankshaft position sensor
Continuous
3 seconds
Immediate: Engine RPM less than 4,000 rpm
2 driving cycles: Engine RPM 4,000 rpm or more
None
None
Less than 0.2 V, or more than 4.9 V
Less than 0.2 V
More than 4.9 V
Between 0.4 V and 2.2 V