2007 INFINITI FX35 Service Manual

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INFINITI FX35 2007 Service Manual DTC P0137, P0157 HO2S2 EC-945
[VK45DE]
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EC
Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal and gro

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INFINITI FX35 2007 Service Manual EC-946
[VK45DE]
DTC P0137, P0157 HO2S2
Revision: 2006 July 2007 FX35/FX45
BANK 2
TBWM1331E

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INFINITI FX35 2007 Service Manual DTC P0137, P0157 HO2S2 EC-947
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Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal and gro

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INFINITI FX35 2007 Service Manual EC-948
[VK45DE]
DTC P0137, P0157 HO2S2
Revision: 2006 July 2007 FX35/FX45
2. CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select

Page 2325 of 4366

INFINITI FX35 2007 Service Manual DTC P0137, P0157 HO2S2 EC-949
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3. CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Dis

Page 2326 of 4366

INFINITI FX35 2007 Service Manual EC-950
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DTC P0137, P0157 HO2S2
Revision: 2006 July 2007 FX35/FX45
5. CHECK HEATED OXYGEN SENSOR 2
Refer to EC-950, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace malfunct

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INFINITI FX35 2007 Service Manual DTC P0137, P0157 HO2S2 EC-951
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Revision: 2006 July 2007 FX35/FX45
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor

Page 2328 of 4366

INFINITI FX35 2007 Service Manual EC-952
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DTC P0138, P0158 HO2S2
Revision: 2006 July 2007 FX35/FX45
DTC P0138, P0158 HO2S2PFP:226A0
Component DescriptionNBS004LA
The heated oxygen sensor 2, after three way catalyst (manifold),

EC-952
[VK45DE]
DTC P0138, P0158 HO2S2
Revision: 2006 July 2007 FX35/FX45
DTC P0138, P0158 HO2S2PFP:226A0
Component DescriptionNBS004LA
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas on each bank.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air-fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1V in richer conditions to 0V in leaner condi-
tions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
CONSULT-II Reference Value in Data Monitor ModeNBS004LB
Specification data are reference values.
On Board Diagnosis LogicNBS004LC
The heated oxygen sensor 2 has a much longer switching time between rich and lean than the A/F sensor 1.
The oxygen storage capacity of the three way catalyst (manifold) causes the longer switching time.
MALFUNCTION A
To judge the malfunctions of heated oxygen sensor 2, ECM monitors
whether the voltage is unusually high during the various driving con-
dition such as fuel-cut.
MALFUNCTION B
To judge the malfunctions of heated oxygen sensor 2, ECM monitors
whether the minimum voltage of sensor is sufficiently low during the
various driving condition such as fuel-cut.
SEF327R
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1)
HO2S2 (B2)
Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
–Engine: After warming up
–Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load 0 - 0.3V
←→ Approx. 0.6 -
1.0V
HO2S2 MNTR (B1)
HO2S2 MNTR (B2)
Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
–Engine: After warming up
–Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load LEAN
←→ RICH
PBIB1848E
PBIB2376E

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