2008 INFINITI FX35 Service Manual

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Page 2049 of 3924

INFINITI FX35 2008 Service Manual
DTC P0131, P0151 A/F SENSOR 1
EC-809
< SERVICE INFORMATION > [VK45DE]
C
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EC
NP
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Do not use ECM ground terminals wh
en measuring input/output voltage. Doing so may result in dam-

Page 2050 of 3924

INFINITI FX35 2008 Service Manual
EC-810
< SERVICE INFORMATION >[VK45DE]
DTC P0131, P0151
A/F SENSOR 1
BANK 2
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CON

Page 2051 of 3924

INFINITI FX35 2008 Service Manual
DTC P0131, P0151 A/F SENSOR 1
EC-811
< SERVICE INFORMATION > [VK45DE]
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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagno

Page 2052 of 3924

INFINITI FX35 2008 Service Manual
EC-812
< SERVICE INFORMATION >[VK45DE]
DTC P0131, P0151
A/F SENSOR 1
3. Check voltage between A/F sensor 1 terminal 3 and ground with
CONSULT-III or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.

Page 2053 of 3924

INFINITI FX35 2008 Service Manual
DTC P0131, P0151 A/F SENSOR 1
EC-813
< SERVICE INFORMATION > [VK45DE]
C
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NP
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NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK

Page 2054 of 3924

INFINITI FX35 2008 Service Manual
EC-814
< SERVICE INFORMATION >[VK45DE]
DTC P0132, P0152
A/F SENSOR 1
DTC P0132, P0152 A/F SENSOR 1
Component DescriptionINFOID:0000000001326657
The air fuel ratio (A/F) sensor 1 is a planar dual-ce

EC-814
< SERVICE INFORMATION >[VK45DE]
DTC P0132, P0152
A/F SENSOR 1
DTC P0132, P0152 A/F SENSOR 1
Component DescriptionINFOID:0000000001326657
The air fuel ratio (A/F) sensor 1 is a planar dual-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is the combination 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. Ther efore, the A/F sensor 1 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 tempera-
ture of 700 - 800 °C (1,292 - 1,472 °F).
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001326658
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000001326659
To judge the malfunction, the diagnosis checks that t he A/F signal computed by ECM from the A/F sensor 1
signal is not inordinately high.
DTC Confirmation ProcedureINFOID:0000000001326660
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5V at idle.
WITH CONSULT-III
1. Start engine and warm it up to normal operating temperature.
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 1.5 V
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 A/F
sensor 1 signal is constantly approx. 5V. Harness or connectors
(The A/F sensor 1 circuit is open or
shorted.)
A/F sensor 1
P0152
0152
(Bank 2)
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

Page 2055 of 3924

INFINITI FX35 2008 Service Manual
DTC P0132, P0152 A/F SENSOR 1
EC-815
< SERVICE INFORMATION > [VK45DE]
C
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G H
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M A
EC
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2. Select “A/F SEN1 (B1)” or “A/F SEN1 (B2)
” in “DATA MONITOR” mode with CONSULT-III

Page 2056 of 3924

INFINITI FX35 2008 Service Manual
EC-816
< SERVICE INFORMATION >[VK45DE]
DTC P0132, P0152
A/F SENSOR 1
Wiring Diagram
INFOID:0000000001326661
BANK 1
Specification data are reference values and are measured between each terminal and

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