Infiniti FX35 / FX45. Manual - part 513

 

  Index      Infiniti     Infiniti FX35 / FX45 (S50) - service repair manual 2008 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  511  512  513  514   ..

 

 

Infiniti FX35 / FX45. Manual - part 513

 

 

DTC P0131, P0151 A/F SENSOR 1

EC-813

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

5.

CHECK INTERMITTENT INCIDENT

Perfor

EC-717

.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace.

6.

REPLACE AIR FUEL RATIO (A/F) SENSOR 1

Replace malfunctioning air fuel ratio (A/F) sensor 1.

CAUTION:

• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a

hard surface such as a concrete floor; use a new one.

• Before installing new A/F sensor, clean exhaust system threads using Oxygen Sensor Thread

Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

>> INSPECTION END

Removal and Installation

INFOID:0000000001326656

AIR FUEL RATIO (A/F) SENSOR 1

Refer to 

EM-179

.

EC-814

< SERVICE INFORMATION >

[VK45DE]

DTC P0132, P0152 A/F SENSOR 1

DTC P0132, P0152 A/F SENSOR 1

Component Description

INFOID: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. 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-III Reference Value in Data Monitor Mode

INFOID:0000000001326658

Specification data are reference values.

On Board Diagnosis Logic

INFOID:0000000001326659

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 Procedure

INFOID:0000000001326660

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-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)

DTC P0132, P0152 A/F SENSOR 1

EC-815

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2.

Select “A/F SEN1 (B1)” or “A/F SEN1 (B2)” in “DATA MONITOR” mode with CONSULT-III.

3.

Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.
If the indication is constantly approx. 5V, go to 

EC-819, "Diagnosis Procedure"

.

If the indication is not constantly approx. 5V, go to next step.

4.

Turn ignition switch OFF, wait at least 10 seconds and then restart engine.

5.

Drive and accelerate vehicle to more than 40 km/h (25 MPH) within 20 seconds after restarting engine.

6.

Maintain the following conditions for about 20 consecutive seconds.

NOTE:
• Keep the accelerator pedal as steady as possible during the cruising.
• If this procedure is not completed within 1 minute after restarting engine at step 4, return to step

4.

7.

Check 1st trip DTC.

8.

If 1st trip DTC is displayed, go to 

EC-819, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-III” above.

ENG SPEED

1,000 - 3,200 rpm

VHCL SPEED SE

More than 40 km/h (25 MPH)

B/FUEL SCHDL

1.5 - 9.0 msec

Gear position

Suitable position

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 ground.
Pulse signal is measured by CONSULT-III.

CAUTION:

TBWM1373E

 

 

 

 

 

 

 

Content   ..  511  512  513  514   ..