Infiniti I35 (A33). Manual — part 227
SEC902C
Overall Function Check
NHEC0893
Use this procedure to check the overall function of the heated oxy-
gen sensor 1 circuit. During this check, a 1st trip DTC might not be
confirmed.
WITH GST
NHEC0893S01
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 ground.
3)
Check the following with engine speed held at 2,000 rpm con-
stant under no load.
I
The voltage does not remain in the range of 0.2 - 0.4V.
4)
If NG, go to “Diagnostic Procedure”, EC-252.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0134, P0154 HO2S1
Overall Function Check
EC-249
Wiring Diagram
=NHEC0894
BANK 1
NHEC0894S01
MEC537D
SEC107D
DTC P0134, P0154 HO2S1
Wiring Diagram
EC-250
BANK 2
NHEC0894S02
MEC538D
SEC108D
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0134, P0154 HO2S1
Wiring Diagram (Cont’d)
EC-251
Diagnostic Procedure
NHEC0895
1
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two engine ground screws.
Refer to “Ground Inspection”, EC-160.
SEC047D
OK or NG
OK
©
GO TO 2.
NG
©
Repair or replace ground connections.
DTC P0134, P0154 HO2S1
Diagnostic Procedure
EC-252
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