2007 INFINITI M35 Factory Service Manual

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Page 2489 of 4647

INFINITI M35 2007 Factory Service Manual EC-960
[VK45DE]
DTC P0131, P0151 A/F SENSOR 1
Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CO

Page 2490 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0131, P0151 A/F SENSOR 1
EC-961
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Revision: 2007 April2007 M35/M45
BANK 2
TBWT1047E

Page 2491 of 4647

INFINITI M35 2007 Factory Service Manual EC-962
[VK45DE]
DTC P0131, P0151 A/F SENSOR 1
Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CO

Page 2492 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0131, P0151 A/F SENSOR 1
EC-963
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Revision: 2007 April2007 M35/M45
2. CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect air fuel ratio (A/F)

Page 2493 of 4647

INFINITI M35 2007 Factory Service Manual EC-964
[VK45DE]
DTC P0131, P0151 A/F SENSOR 1
Revision: 2007 April2007 M35/M45
4. CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness conn

Page 2494 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0131, P0151 A/F SENSOR 1
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Revision: 2007 April2007 M35/M45
Removal and InstallationNBS005E3
AIR FUEL RATIO (A/F) SENSOR 1
Refer to EM-183, "EXHAUST MANIFO

Page 2495 of 4647

INFINITI M35 2007 Factory Service Manual EC-966
[VK45DE]
DTC P0132, P0152 A/F SENSOR 1
Revision: 2007 April2007 M35/M45
DTC P0132, P0152 A/F SENSOR 1PFP:22693
Component DescriptionNBS005E4
The air fuel ratio (A/F) sensor 1 is a planar dual-c

EC-966
[VK45DE]
DTC P0132, P0152 A/F SENSOR 1
Revision: 2007 April2007 M35/M45
DTC P0132, P0152 A/F SENSOR 1PFP:22693
Component DescriptionNBS005E4
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 ModeNBS005E5
Specification data are reference values.
On Board Diagnosis LogicNBS005E6
To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1
signal is not inordinately high.
DTC Confirmation ProcedureNBS005E7
NOTE:
If DTC Confirmation Procedure has been previously conducted, 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-II
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-II.
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)

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INFINITI M35 2007 Factory Service Manual DTC P0132, P0152 A/F SENSOR 1
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Revision: 2007 April2007 M35/M45
3. Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.
If the indication is constantly

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