2007 INFINITI FX35 Service Manual

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Page 1617 of 4366

INFINITI FX35 2007 Service Manual DTC P0131, P0151 A/F SENSOR 1 EC-241
[VQ35DE]
C
D E
F
G H
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EC
Revision: 2006 July 2007 FX35/FX45
Wiring DiagramNBS003V7
BANK 1
TBWM1598E

Page 1618 of 4366

INFINITI FX35 2007 Service Manual EC-242
[VQ35DE]
DTC P0131, P0151 A/F SENSOR 1
Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by

Page 1619 of 4366

INFINITI FX35 2007 Service Manual DTC P0131, P0151 A/F SENSOR 1 EC-243
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2006 July 2007 FX35/FX45
BANK 2
TBWM1599E

Page 1620 of 4366

INFINITI FX35 2007 Service Manual EC-244
[VQ35DE]
DTC P0131, P0151 A/F SENSOR 1
Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by

Page 1621 of 4366

INFINITI FX35 2007 Service Manual DTC P0131, P0151 A/F SENSOR 1 EC-245
[VQ35DE]
C
D E
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G H
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EC
Revision: 2006 July 2007 FX35/FX45
2. CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect air

Page 1622 of 4366

INFINITI FX35 2007 Service Manual EC-246
[VQ35DE]
DTC P0131, P0151 A/F SENSOR 1
Revision: 2006 July 2007 FX35/FX45
4. CHECK AIR FUEL RATIO (A/F) SENSOR 1 INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness co

Page 1623 of 4366

INFINITI FX35 2007 Service Manual DTC P0131, P0151 A/F SENSOR 1 EC-247
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EC
Revision: 2006 July 2007 FX35/FX45
Removal and InstallationNBS003V9
AIR FUEL RATIO (A/F) SENSOR 1
Refer to EM-26,

Page 1624 of 4366

INFINITI FX35 2007 Service Manual EC-248
[VQ35DE]
DTC P0132, P0152 A/F SENSOR 1
Revision: 2006 July 2007 FX35/FX45
DTC P0132, P0152 A/F SENSOR 1PFP:22693
Component DescriptionNBS003VA
The air fuel ratio (A/F) sensor is a planar dual-c

EC-248
[VQ35DE]
DTC P0132, P0152 A/F SENSOR 1
Revision: 2006 July 2007 FX35/FX45
DTC P0132, P0152 A/F SENSOR 1PFP:22693
Component DescriptionNBS003VA
The air fuel ratio (A/F) sensor is a planar dual-cell limit current sen-
sor. The sensor element of the air fuel ratio (A/F) sensor is the com-
bination of a Nernst concentration cell (sensor cell) with an oxygen-
pump cell, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range (0.7 < < air).
The exhaust gas components diffuse through the diffusion gap at the
electrode of the oxygen pump and Nernst concentration cell, where
they are brought to thermodynamic balance.
An electronic circuit controls the pump current through the oxygen-
pump cell so that the composition of the exhaust gas in the diffusion
gap remains constant at = 1. Therefore, the air fuel ratio (A/F) sen-
sor is able to indicate air/fuel ratio by this pumping of current. In
addition, a heater is integrated in the sensor to ensure the required
operating temperature of 700 - 800 °C (1,292 - 1,472 °F).
CONSULT-II Reference Value in Data Monitor ModeNBS003VB
Specification data are reference values.
On Board Diagnosis LogicNBS003VC
To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the air fuel ratio (A/
F) sensor 1 signal is not inordinately high.
SEF579Z
SEF580Z
MONITOR ITEM CONDITION SPECIFICATION
A/F SEN1 (B1)
A/F SEN1 (B2)
Engine: After warming up Maintaining engine speed at
2,000 rpm Fluctuates around 1.5V
DTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P0132
0132
(Bank 1) Air fuel ratio (A/F) sensor 1
circuit high voltage The A/F signal computed by ECM from the air
fuel ratio (A/F) sensor 1 signal is constantly
approx. 5V.
Harness or connectors
[Air fuel ratio (A/F) sensor 1 circuit
is open or shorted.]
Air fuel ratio (A/F) sensor 1
P0152
0152
(Bank 2)

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