Toyota Celica 2005 Repair Manual page 640

P0138: Output voltage
Engine
Battery voltage
TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria
P0136: Output voltage (crack)
Following conditions are met:
A. Cumulative heated oxygen sensor monitor time
B. Duration while heated oxygen sensor voltage is less than
0.05V
C. Maximum heated oxygen sensor rich time (0.45V or
more)
P0136: Output voltage
Number of heated oxygen sensor voltage "switching"
"Switching" is counted when the sensor signal crosses the minimum or maximum voltage
Minimum voltage
Maximum voltage
P0138: Slow response
Time until the rear oxygen sensor voltage drops to 0.2 V
after fuel cut starts operating
P0138: Output voltage
Duration while oxygen sensor output voltage is 1.2 V or
more
COMPONENT OPERATING RANGE
Parameter
Heated oxygen sensor voltage
O2S TEST RESULT (MODE 05 DATA)
Refer to page DI−295 for detailed information.
Rear HO2S voltage monitor
If the HO2S sensor voltage is out of the standard value, the ECM interprets this as a malfunction.
TEST ID
$07
$08
If the time required to change is out of the standard value, the ECM interprets this as a malfunction.
TEST ID
$31
$32
Rear HO2S slow response monitor
If the elapsed time is out of the standard value, the ECM interprets this as a malfunction.
TEST ID
$37
2005 CELICA (RM1131U)
DIAGNOSTICS
Description of TEST DATA
Minimum rear HO2S voltage
Maximum rear HO2S voltage
Description of TEST DATA
Time to change from Lean (<0.4 V)
to Rich (y0.5 V)
Time to change from Rich (y0.5
V) to Lean (<0.4 V)
Description of TEST DATA
Time until rear HO2S voltage
drops to 0.2 V after fuel−cut start-
ing
− ENGINE (2ZZ−GE)
Running
11 V
200 sec. or more
120 sec. or more
Less than 20 sec.
Conversion Factor
Multiplied by 0.005
Multiplied by 0.005
Conversion Factor
Multiplied by 0.04
Multiplied by 0.04
Conversion Factor
Multiplied by 0.04
639
−
Threshold
A, B and C
0 time or less
0.4 V or less
0.5 V or more
7 sec. or more
10 sec. or more
Standard Value
0 to 1 V
V
V
sec.
sec.
sec.
DI−441
Unit
Unit
Unit