Toyota Celica 2005 Repair Manual page 653

DI−454
9 Check output voltage of heated oxygen sensor (bank 1 sensor 1) during idling.
PREPARATION:
(a) Connect the hand−held tester or the OBD II scan tool to the DLC3.
(b) Start the engine and push the hand−held tester or the OBD II scan tool main switch ON.
(c) Whe using hand−held tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA
LIST / ALL / O2S B1S1."
(d) Warm up the heated oxygen sensor with the engine speed at 2,500 rpm for approximately 90 seconds.
CHECK:
Read the output voltage of the heated oxygen sensor during idling.
OK:
Heated oxygen sensor output voltage:
Alternates repeatedly between less than 0.4 V and more than 0.5 V (See the following table).
NG
10 Check resistance of heated oxygen sensor heater.
E1−
OK
2005 CELICA (RM1131U)
DIAGNOSTICS −
OK
PREPARATION:
Disconnect the heated oxygen sensor connector.
CHECK:
Measure resistance between the terminals HT and +B of the
heated oxygen sensor.
OK:
Resistance: 11 to 16 Ω (20_C)
OX
NG
A19287
652
ENGINE (2ZZ−GE)
Go to step 17.
Replace heated oxygen sensor.
A21259