Toyota Celica 2005 Repair Manual page 655

DI−456
13 Replace heated oxygen sensor.
Go
14 Perform confirmation driving pattern.
Vehicle speed
19mph
(30 km/h)
IG SW OFF
(L1)
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(a) Disconnect the battery terminal and wait for a minute (clear learning value of the air fuel ratio). (L1)
(b) Connect the hand−held tester to the DLC3. (L1)
(c) Switch the hand−held tester from the normal mode to the check mode (See page DI−295). (L1)
(d) Start the engine and let it idle until engine coolant temperature is 75 °C (167 °F ) or more. (L2)
(e) Drive the vehicle at 19 mph (30 km/h) or more for 3 minutes or more. (L3)
(f) Let the engine idle for approx. 2 minutes. (L4)
(g) Perform steps (e) and (g) at least 3 times.
HINT:
If a malfunction exists, the MIL will be illuminated during step (f).
NOTICE:
If the conditions in this test are not strictly followed, detecting a malfunction may be difficult. If you
do not have a hand−held tester, turn the ignition switch OFF after performing steps (e) to (f), and then
perform step (f) again.
Go
15 Is there DTC P0171 or P0172 being output again?
NO
2005 CELICA (RM1131U)
DIAGNOSTICS
3 to 5 minutes
(L3)
Idling(L2)
Warm up
2 minutes
− ENGINE (2ZZ−GE)
3 to 5 minutes 3 to 5 minutes
(L3)
(L4) (L4)
2 minutes
YES Replace ECM (See page SF−78) and perform
confirmation driving pattern (Refer to step 14).
654
(L3)
(L4)
2 minutes
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