Toyota Celica 2005 Repair Manual page 575

DI−376
MONITOR DESCRIPTION
The ECM monitors the sensor voltage and uses this value to calculate the IAT (Intake Air Temperature).
When the sensor output voltage deviates from the normal operating range, the ECM interprets this as a fault
in the IAT sensor and sets a DTC.
Example:
The sensor voltage output is equal to −40_C (−40_F), or more than 140_C (284_F).
MONITOR STRATEGY
Related DTCs
Required sensors/components
Frequency of operation
Duration
MIL operation
Sequence of operation
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these
DTCs are not present
The typical enabling condition is not avail-
able
TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria
P0110:
Intake air temperature sensor resistance
(Intake air temperature)
P0112:
Intake air temperature sensor resistance
(Intake air temperature)
P0113:
Intake air temperature sensor resistance
(Intake air temperature)
COMPONENT OPERATING RANGE
Parameter
Intake air temperature sensor resistance
2005 CELICA (RM1131U)
DIAGNOSTICS −
P0110
P0112
P0113
Intake air temperature sensor
Continuous
0.5 sec.
Immediate
None
574
ENGINE (2ZZ−GE)
Intake air temperature sensor range check
(Fluttering)
Intake air temperature sensor range check
(Low resistance)
Intake air temperature sensor range check
(High resistance)
See page DI−295
−
Threshold
Less than 98.5 Ω, or more than 156 kΩ
(More than 140_C (284_F), or less than −40_C (−40_F))
Less than 98.5 Ω
(More than 140_C (284_F))
More than 156 kΩ
(Less than −40_C (−40_F))
Standard Value
98.5 Ω (140_C (284_F)) to 156 kΩ (−40_C (−40_F))