Toyota Celica 2005 Repair Manual page 308

MONITOR STRATEGY
Related DTCs
Required sensors/components
Frequency of operation
Duration
MIL operation
Sequence of operation
TYPICAL ENABLING CONDITIONS
Item
The monitor will run whenever this DTC is
not present
Battery voltage
Throttle position learning
Intake air temperature at engine start
Engine coolant temperature at engine
start
Engine coolant temperature at engine
start − Intake air temperature at engine
start
Accumulated time that vehicle speed
reaches 128 km/h (80 mph) or more
TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria
Duration that both of the following conditions 1 and 2 are
met:
1. Estimated engine coolant temperature
2. Engine coolant temperature sensor output
COMPONENT OPERATING RANGE
Parameter
Engine coolant temperature sensor output value after en-
gine warm−up
2005 CELICA (RM1131U)
DIAGNOSTICS −
P0128
Main sensors/components
Related sensors/components
Once per driving cycle
15 min.
2 driving cycles
None
Minimum
11.0 V
−10_C (14_F)
−10_C (14_F)
−15_C (−27_F)
−
307
ENGINE (1ZZ−FE)
Thermostat
Engine coolant temperature sensor, Engine
cooling system, Thermostat
Intake air temperature sensor, Vehicle speed
sensor
Specification
See page DI−3
Completed
Threshold
5 sec. or more
75_C (167_F) or more
Less than 75_C (167_F)
Standard Value
75_C (167_F) or more
DI−109
Maximum
−
35_C (95_F)
35_C (95_F)
7_C (12.6_F)
20 sec.