Infiniti M35/M45 Y50. Manual — part 623
DTC P0131, P0151 A/F SENSOR 1
EC-965
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Removal and Installation
NBS005E3
AIR FUEL RATIO (A/F) SENSOR 1
Refer to
EC-966
[VK45DE]
DTC P0132, P0152 A/F SENSOR 1
DTC P0132, P0152 A/F SENSOR 1
PFP:22693
Component Description
NBS005E4
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 Mode
NBS005E5
Specification data are reference values.
On Board Diagnosis Logic
NBS005E6
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
NBS005E7
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)
DTC P0132, P0152 A/F SENSOR 1
EC-967
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
3.
Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.
If the indication is constantly approx. 5V, go to
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 sec-
onds.
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.
If 1st trip DTC is displayed, go to
EC-971, "Diagnostic Procedure"
WITH GST
Follow the procedure “WITH CONSULT-II” 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
SEF581Z
EC-968
[VK45DE]
DTC P0132, P0152 A/F SENSOR 1
Wiring Diagram
NBS005E8
BANK 1
TBWT1046E
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст