Toyota 2GR-FE Manual page 301

HINT:
When any of these DTCs are set, check the IAT by entering the following menus on the intelligent tester:
DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / INTAKE AIR.
Temperature Displayed
-40°C (-40°F)
140°C (284°F) or higher
MONITOR DESCRIPTION
The ECM monitors the sensor voltage and uses this value to calculate the Intake Air Temperature (IAT).
When the sensor output voltage deviates from the normal operating range, the ECM interprets this as a
malfunction in the IAT sensor and sets a DTC.
Example:
If the sensor output voltage is -40°C (-40°F) for 0.5 seconds or more, the ECM determines that there is
an open in the IAT sensor circuit, and sets DTC P0113. Conversely, if the output voltage is more than
140°C (284°F) for 0.5 seconds or more, the ECM determines that there is a short in the sensor circuit,
and sets DTC P0112.
If the malfunction is not repaired successfully, a DTC is set 0.5 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
P0110:
Intake air temperature sensor voltage
P0112:
Intake air temperature sensor voltage
P0113:
Intake air temperature sensor voltage
COMPONENT OPERATING RANGE
Intake air temperature sensor resistance
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
Malfunction
Open circuit
Short circuit
P0110: Intake air temperature sensor open/short (Fluctuating)
P0112: Intake air temperature sensor short (Low electrical resistance)
P0113: Intake air temperature sensor open (High electrical resistance)
Intake Air Temperature (IAT) sensor
-
Continuous
0.5 seconds
Immediate
None
None
Less than 0.18 V, or more than 4.91 V
Less than 0.18 V
More than 4.91 V
98.5 Ω to 156 kΩ [-40 to 140°C (-40 to 284°F)]
ES–145
ES