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7 CHECK HEATED OXYGEN SENSOR 1
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 91 (HO2S1 bank 1 signal) or 92 (HO2S1 bank 2 signal) and engine
ground.
3. Check the following with engine speed held at 2,000 rpm constant under no load.
I The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V more than 5 times within 10 seconds.
I The maximum voltage is over 0.6V at least one time.
I The minimum voltage is below 0.3V at least one time.
I The voltage never exceeds 1.0V.
1 time: 0 - 0.3V , 0.6 - 1.0V , 0 - 0.3V
2 times: 0 - 0.3V , 0.6 - 1.0V , 0 - 0.3V , 0.6 - 1.0V , 0 - 0.3V
SEC085D
CAUTION:
I 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.
I Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubricant.
OK or NG
OK © GO TO 8.
NG © Replace malfunctioning heated oxygen sensor 1.
8 CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-156.
For circuit, refer to “Wiring Diagram”, EC-231.
© INSPECTION END
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1144, P1164 HO2S1
Diagnostic Procedure (Cont’d)
EC-505
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