2007 INFINITI FX35 Service Manual

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Page 2657 of 4366

INFINITI FX35 2007 Service Manual DTC P2138 APP SENSOR EC-1281
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Revision: 2006 July 2007 FX35/FX45
Wiring DiagramNBS004GJ
TBWM1357E

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INFINITI FX35 2007 Service Manual EC-1282
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DTC P2138 APP SENSOR
Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground ter

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INFINITI FX35 2007 Service Manual DTC P2138 APP SENSOR EC-1283
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2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (A

Page 2660 of 4366

INFINITI FX35 2007 Service Manual EC-1284
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DTC P2138 APP SENSOR
Revision: 2006 July 2007 FX35/FX45
5. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harn

Page 2661 of 4366

INFINITI FX35 2007 Service Manual DTC P2138 APP SENSOR EC-1285
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10. CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2

Page 2662 of 4366

INFINITI FX35 2007 Service Manual EC-1286
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DTC P2138 APP SENSOR
Revision: 2006 July 2007 FX35/FX45
15. REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-745, "
Accelerator Pedal Releas

Page 2663 of 4366

INFINITI FX35 2007 Service Manual DTC P2A00, P2A03 A/F SENSOR 1 EC-1287
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Revision: 2006 July 2007 FX35/FX45
DTC P2A00, P2A03 A/F SENSOR 1PFP:22693
Component DescriptionNBS004LP
The air f

DTC P2A00, P2A03 A/F SENSOR 1 EC-1287
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Revision: 2006 July 2007 FX35/FX45
DTC P2A00, P2A03 A/F SENSOR 1PFP:22693
Component DescriptionNBS004LP
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. Therefore, 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-II Reference Value in Data Monitor ModeNBS004LQ
Specification data are reference values.
On Board Diagnosis LogicNBS004LR
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.
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)

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INFINITI FX35 2007 Service Manual EC-1288
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DTC P2A00, P2A03 A/F SENSOR 1
Revision: 2006 July 2007 FX35/FX45
DTC Confirmation ProcedureNBS004LS
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ign

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