Toyota Celica 2005 Repair Manual page 323

DI−124
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
Slow slope condition:
There is a history that the following condi-
tions were met for 20 sec.:
1. Vehicle speed
2. Engine RPM
Idle
Vehicle speed
Fuel system status
Time after engine start
Frequency cruise condition:
Number of fail judgement is incremented
under the following conditions:
1. Number of cycle time data summation
2. Sum of cycle time data
3. Number of cycle time data summation
4. Sum of cycle time data
TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria
Slow slope condition:
Time that output voltage of front heated oxygen sensor in-
crease. from 0.35 V to 0.5 V and that it decreases from 0.5
V to 0.35 V
Frequency cruise condition:
Oxygen sensor frequency is judged malfunction under the
following conditions:
1. Number of fail judgement
2. Neither pass nor fail determined yet
COMPONENT OPERATING RANGE
Parameter
Voltage output from heated oxygen sensor
2005 CELICA (RM1131U)
DIAGNOSTICS −
P0133
Main sensors/components
Related sensors/components
Once per driving cycle
Within 60 sec.
2 driving cycles
None
Minimum
40 km/h (25 mph)
900 rpm
−
120 sec.
10 times
1 time
Sum of cycle threshold x 1.2 x 10 / number of summation
322
ENGINE (1ZZ−FE)
Front heated oxygen sensor response monitor
Front heated oxygen sensor
Crank position sensor, Vehicle speed sensor,
Mass air flow meter
Specification
See page DI−3
Condition 1 and 2
ON
Closed loop
(1 and 2) or (3 and 4) is met
Sum of cycle threshold
Threshold
0.6 sec. or more
Both 1 and 2 are met
1 time or more
Standard value
Quickly fluctuates between 0.35 V and 0.5 V
Maximum
−
−
5 km/h (3.1 mph)
−
−
10 times