Toyota Celica 2005 Repair Manual page 318

2 Check the output voltage of oxygen sensor 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) When 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
3 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.
Resistance: Bank 1 Sensor 1: 5 to 10 Ω (20 °C (68 °F))
OX
A19287
NG
317
ENGINE (1ZZ−FE)
Go to step 9.
Bank 1 Sensor 2: 11 to 16 Ω (20 °C (68 °F))
Replace heated oxygen sensor.
DI−119
P18349