2007 INFINITI FX35 Service Manual

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Page 2313 of 4366

INFINITI FX35 2007 Service Manual DTC P0133, P0153 A/F SENSOR 1 EC-937
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Revision: 2006 July 2007 FX35/FX45
5. CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1. Start engine and warm i

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INFINITI FX35 2007 Service Manual EC-938
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DTC P0133, P0153 A/F SENSOR 1
Revision: 2006 July 2007 FX35/FX45
6. CHECK A/F SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect A/F sensor 1 harness connector.
2. Turn ignition switch ON.

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INFINITI FX35 2007 Service Manual DTC P0133, P0153 A/F SENSOR 1 EC-939
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Revision: 2006 July 2007 FX35/FX45
8. CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition

Page 2316 of 4366

INFINITI FX35 2007 Service Manual EC-940
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DTC P0133, P0153 A/F SENSOR 1
Revision: 2006 July 2007 FX35/FX45
11 . CHECK PCV VALVE
Refer to EC-712, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> Repair or replace

Page 2317 of 4366

INFINITI FX35 2007 Service Manual DTC P0137, P0157 HO2S2 EC-941
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Revision: 2006 July 2007 FX35/FX45
DTC P0137, P0157 HO2S2PFP:226A0
Component DescriptionNBS004L8
The heated oxygen sensor

DTC P0137, P0157 HO2S2 EC-941
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Revision: 2006 July 2007 FX35/FX45
DTC P0137, P0157 HO2S2PFP:226A0
Component DescriptionNBS004L8
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 ModeNBS004L9
Specification data are reference values.
On Board Diagnosis LogicNBS004C8
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. To judge the malfunctions of heated oxygen sensor
2, ECM monitors whether the maximum voltage of the sensor is suf-
ficiently high 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
PBIB2030E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1147
11 4 7
(Bank 1) Heated oxygen sensor
2 circuit low voltage The maximum voltage from the sensor is not
reached to the specified voltage.
Harness or connectors
(The sensor circuit is open or shorted)
Heated oxygen sensor 2
Fuel pressure
Fuel injector
Intake air leaks
P1167
11 6 7
(Bank 2)

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INFINITI FX35 2007 Service Manual EC-942
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DTC P0137, P0157 HO2S2
Revision: 2006 July 2007 FX35/FX45
DTC Confirmation ProcedureNBS004C9
NOTE:
If DTC confirmation Procedure has been previously conducted, always turn ignition sw

Page 2319 of 4366

INFINITI FX35 2007 Service Manual DTC P0137, P0157 HO2S2 EC-943
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Revision: 2006 July 2007 FX35/FX45
Overall Function CheckNBS004CA
Use this procedure to check the overall function of the

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INFINITI FX35 2007 Service Manual EC-944
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DTC P0137, P0157 HO2S2
Revision: 2006 July 2007 FX35/FX45
Wiring DiagramNBS004CB
BANK 1
TBWM1330E

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