Toyota Celica 2005 Repair Manual page 268

INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand−held tester or the OBD II scan tool. Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help deter-
mine if the vehicle was running or stopped, if the engine was warmed up or not, if the air−fuel ratio was lean
or rich, as well as other data from the time when a malfunction occurred.
1 Check resistance of heated oxygen sensor heater.
E1
OK
2 Check EFI relay.
OK
2005 CELICA (RM1131U)
DIAGNOSTICS −
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
NG
A19287
PREPARATION:
Remove the EFI relay from the engine room J/B.
CHECK:
Inspect the EFI relay.
OK:
Tester Connection
1 − 2
A19288
3 − 5
NG
267
ENGINE (1ZZ−FE)
Bank 1 Sensor 2: 11 to 16 Ω (20 °C (68 °F))
Replace heated oxygen sensor.
(Apply battery voltage to terminals 1 and 2)
Replace EFI relay.
Specified Condition
Continuity
No continuity
Continuity
DI−69