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7 CHECK HEATED OXYGEN SENSOR 2-I
Without CONSULT-II
1. Start engine and drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle with engine running.
3. Set voltmeter probes between ECM terminal 88 (HO2S2 bank 1 signal) or 90 (HO2S2 bank 2 signal) and engine
ground.
4. Check the voltage when rewing up to 4,000 rpm under no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
SEC903C
The voltage should be above 0.63V at least once during this procedure.
OK or NG
OK © GO TO 10.
NG © GO TO 8.
8 CHECK HEATED OXYGEN SENSOR 2-II
Without CONSULT-II
Idle vehicle for 10 minutes, then check voltage between the same terminals as in Test No. 7; or check voltage when coast-
ing from 80 km/h (50 MPH) in 3rd gear position (M/T), “D” position with “OD” OFF (A/T).
The voltage should go below 0.48V at least once during this procedure.
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK © GO TO 10.
NG © GO TO 9.
DTC P1146, P1166 HO2S2
Diagnostic Procedure (Cont’d)
EC-514
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