2008 INFINITI FX35 Service Manual

inflation pressure open bonnet recommended oil ad blue lug pattern fuel tank capacity

Page 2369 of 3924

INFINITI FX35 2008 Service Manual
DTC P2A00, P2A03 A/F SENSOR 1EC-1129
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DTC P2A00, P2A03 A/F SENSOR 1
Component DescriptionINFOID:0000000001327032
The air fuel ratio (A/

DTC P2A00, P2A03 A/F SENSOR 1EC-1129
< SERVICE INFORMATION > [VK45DE]
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DTC P2A00, P2A03 A/F SENSOR 1
Component DescriptionINFOID:0000000001327032
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 m
easurement = 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 Ne rnst 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 Val ue in Data Monitor ModeINFOID:0000000001327033
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001327034
To judge the malfunction, the A/F signal computed by ECM from the A/F sensor 1 signal is monitored not to be
shifted to LEAN side or RICH side.
DTC Confirmation ProcedureINFOID:0000000001327035
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.
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
P2A00
2A00
(Bank 1) Air fuel ratio (A/F) sensor 1
circuit range/performance The output voltage computed by ECM from the
A/F sensor 1 signal is shifted to the lean side for
a specified period.
The A/F signal computed by ECM from the A/F sensor 1 signal is shifted to the rich side for a
specified period. A/F sensor 1
A/F sensor 1 heater
Fuel pressure
Fuel injector
Intake air leaks
P2A03
2A03
(Bank 2)
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

Page 2370 of 3924

INFINITI FX35 2008 Service Manual
EC-1130
< SERVICE INFORMATION >[VK45DE]
DTC P2A00, P2A03 A/F SENSOR 1
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON and select “SELF-LE
ARNING CONT” in “W

Page 2371 of 3924

INFINITI FX35 2008 Service Manual
DTC P2A00, P2A03 A/F SENSOR 1EC-1131
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Wiring DiagramINFOID:0000000001327036
BANK 1
Specification data are reference values
and are mea

Page 2372 of 3924

INFINITI FX35 2008 Service Manual
EC-1132
< SERVICE INFORMATION >[VK45DE]
DTC P2A00, P2A03 A/F SENSOR 1
Do not use ECM ground terminals when measuring in
put/output voltage. Doing so may result in dam-
age to the ECMs transistor. Us

Page 2373 of 3924

INFINITI FX35 2008 Service Manual
DTC P2A00, P2A03 A/F SENSOR 1EC-1133
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BANK 2
Specification data are reference values
and are measured between each terminal and ground

Page 2374 of 3924

INFINITI FX35 2008 Service Manual
EC-1134
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DTC P2A00, P2A03 A/F SENSOR 1
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis ProcedureINFOID:000000000132

Page 2375 of 3924

INFINITI FX35 2008 Service Manual
DTC P2A00, P2A03 A/F SENSOR 1EC-1135
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O>> GO TO 3.
3.CHECK FOR INTAKE AIR LEAK
1. Start engine and run it at idle.
2. Listen for an intak

Page 2376 of 3924

INFINITI FX35 2008 Service Manual
EC-1136
< SERVICE INFORMATION >[VK45DE]
DTC P2A00, P2A03 A/F SENSOR 1
OK or NG
OK >> GO TO 6.
NG >> Repair or replace harness connector.
6.CHECK A/F SENSOR 1 POWER SUPPLY CIRCUIT
1. Turn ignition swi

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