2008 INFINITI FX35 Service Manual

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Page 1457 of 3924

INFINITI FX35 2008 Service Manual
DTC P0130, P0150 A/F SENSOR 1
EC-217
< SERVICE INFORMATION > [VQ35DE]
C
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EC
NP
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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagno

Page 1458 of 3924

INFINITI FX35 2008 Service Manual
EC-218
< SERVICE INFORMATION >[VQ35DE]
DTC P0130, P0150
A/F SENSOR 1
3. Check voltage between air fuel ratio (A/F) sensor 1 terminal 3
and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 4.

Page 1459 of 3924

INFINITI FX35 2008 Service Manual
DTC P0130, P0150 A/F SENSOR 1
EC-219
< SERVICE INFORMATION > [VQ35DE]
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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 1460 of 3924

INFINITI FX35 2008 Service Manual
EC-220
< SERVICE INFORMATION >[VQ35DE]
DTC P0131, P0151
A/F SENSOR 1
DTC P0131, P0151 A/F SENSOR 1
Component DescriptionINFOID:0000000001326053
The air fuel ratio (A/F) sensor is a planar dual-cell

EC-220
< SERVICE INFORMATION >[VQ35DE]
DTC P0131, P0151
A/F SENSOR 1
DTC P0131, P0151 A/F SENSOR 1
Component DescriptionINFOID:0000000001326053
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 concentrati on 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-III Reference Value in Data Monitor ModeINFOID:0000000001326054
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000001326055
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 low.
DTC Confirmation ProcedureINFOID:0000000001326056
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 11V at idle.
WITH CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Select “A/F SEN1 (B1)” or “A/F SEN1 (B2)” in “DATA MONITOR” mode with CONSULT-III.
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
P0131
0131
(Bank 1) Air fuel ratio (A/F) sensor 1
circuit low voltage The A/F signal computed by ECM from the air
fuel ratio (A/F) sensor 1 signal is constantly ap-
prox. 0V. Harness or connectors
[Air fuel ratio (A/F) sensor 1 circuit is
open or shorted.]
Air fuel ratio (A/F) sensor 1
P0151
0151
(Bank 2)
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

Page 1461 of 3924

INFINITI FX35 2008 Service Manual
DTC P0131, P0151 A/F SENSOR 1
EC-221
< SERVICE INFORMATION > [VQ35DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
3. Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.
If the indication is constantly a

Page 1462 of 3924

INFINITI FX35 2008 Service Manual
EC-222
< SERVICE INFORMATION >[VQ35DE]
DTC P0131, P0151
A/F SENSOR 1
Wiring Diagram
INFOID:0000000001326057
BANK 1
Specification data are reference values and are measured between each terminal and

Page 1463 of 3924

INFINITI FX35 2008 Service Manual
DTC P0131, P0151 A/F SENSOR 1
EC-223
< SERVICE INFORMATION > [VQ35DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Do not use ECM ground terminals wh
en measuring input/output voltage. Doing so may result in dam-

Page 1464 of 3924

INFINITI FX35 2008 Service Manual
EC-224
< SERVICE INFORMATION >[VQ35DE]
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

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