Nissan Primera P11. Instruction — part 247
Component Description
NCEC0153
The heated oxygen sensor 2 (rear) (Rear HO2S), after three way
catalyst, monitors the oxygen level in the exhaust gas.
Even if switching characteristics of the heated oxygen sensor 1
(front) are shifted, the air fuel ratio is controlled to stoichiometric,
by the signal from the heated oxygen sensor 2 (rear).
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner
conditions.
Under normal conditions the heated oxygen sensor 2 (rear) is not
used for engine control operation.
CONSULT-II Reference Value in Data Monitor
Mode
NCEC0154
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S2 (B1)
I
Engine: After warming up
Revving engine from idle to 3,000
rpm
0 - 0.3V
+,
Approx. 0.6 - 1.0V
HO2S2 MNTR
(B1)
LEAN
+,
RICH
ECM Terminals and Reference Value
NCEC0155
Specification data are reference values and are measured between each terminal and 48 (ECM ground).
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
63
L
Heated oxygen sensor 2
(rear)
[Engine is running]
I
After warming up to normal operating temperature
and engine speed is 2,000 rpm
0 - Approximately 1.0V
On Board Diagnosis Logic
NCEC0156
The heated oxygen sensor 2 (rear) has a much longer switching
time between rich and lean than the heated oxygen sensor 1
(front). The oxygen storage capacity before the three way catalyst
causes the longer switching time. To judge the malfunctions of
heated oxygen sensor 2 (rear), ECM monitors whether the maxi-
mum voltage of the sensor is sufficiently high during various driv-
ing conditions such as fuel-cut.
DTC No.
Malfunction is detected when ...
Check Items (Possible Cause)
P0138
0138
I
The maximum voltage from the sensor does not reach
the specified voltage.
I
Harness or connectors
(The sensor circuit is open or shorted.)
I
Heated oxygen sensor 2 (rear)
I
Fuel pressure
I
Injectors
I
Intake air leaks
SEF327R
SEF259V
OK
NG
1V
0.43V
0V
DTC P0138 HEATED OXYGEN SENSOR 2
(REAR) (MAX. VOLTAGE MONITORING)
SR20DE
Component Description
EC-187
DTC Confirmation Procedure
NCEC0157
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 9 seconds
before conducting the next test.
TESTING CONDITION:
I
Always perform at a temperature above −10°C (14°F).
I
Never stop engine during this procedure. If the engine is
stopped, retry this procedure from step 2.
With CONSULT-II
NOTE:
The figure on the left will be displayed on the CONSULT-II
screen when you start the DTC Work Support. Ignore the first
figure and start the test.
“COMPLETED” will be displayed on the screen as the second
figure when the test is completed properly.
1)
Start engine and warm it up to normal operating temperature.
2)
Turn ignition switch “OFF” and wait at least 9 seconds.
3)
Turn ignition switch “ON” and select “HO2S2 (B1) P0138” of
“HO2S2” in “DTC WORK SUPPORT” mode with CONSULT-II.
4)
Touch “START”.
5)
Start engine and let it idle for at least 30 seconds.
6)
Rev engine up to 2,000 rpm 2 or 3 times quickly under no load.
If “COMPLETED” appears on CONSULT-II screen, go to step
10.
If “COMPLETED” does not appear on CONSULT-II screen, go
to the following step.
7)
Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2
consecutive minutes.
8)
Additionally, “COMPLETED” will be displayed on the CON-
SULT-II screen when the accelerator pedal is completely
released after the vehicle is driven for 60 seconds or more
under the following conditions.
(It will take approximately 5 seconds.)
ENG SPEED
1,650 - 3,600 rpm (CVT)
1,500 - 3,600 rpm (M/T)
Vehicle speed
68 - 130 km/h (42 - 81 MPH)
B/FUEL SCHDL
3.2 - 15.0 msec (CVT)
3.2 - 13.5 msec (M/T)
Selector lever
D position (CVT)
4th gear position (M/T)
NOTE:
I
If “COMPLETED” appears on CONSULT-II screen, go to
step 10.
I
If “COMPLETED” does not appear on CONSULT-II screen,
go to the following step.
9)
Stop the vehicle and let it idle until “COMPLETED” is displayed
on the CONSULT-II screen. (It will take 6 minutes at the most.)
NOTE:
If “COMPLETED” is not displayed after 6 minutes, retry from
step 2.
10) Make sure that “OK” is displayed after touching “SELF-DIAG
SEF685X
SEF687X
DTC P0138 HEATED OXYGEN SENSOR 2
(REAR) (MAX. VOLTAGE MONITORING)
SR20DE
DTC Confirmation Procedure
EC-188
RESULTS”.
If
“NG”
is
displayed,
refer
to
“Diagnostic
Procedure”, EC-SR-191.
Overall Function Check
NCEC0158
Use this procedure to check the overall function of the heated oxy-
gen sensor 2 (rear) circuit. During this check, a 1st trip DTC might
not be confirmed.
Without CONSULT-II
1)
Start engine and drive vehicle at a speed of 70 km/h (43 MPH)
for 2 consecutive minutes.
2)
Stop vehicle with engine running.
3)
Set voltmeter probes between ECM terminals 63 (Heated oxy-
gen sensor 2 (rear) signal) and engine ground.
4)
Check the voltage when revving engine up to 4,000 rpm under
no load at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.48V at least once during
this procedure.
If the voltage can be confirmed in step 4, step 5 is not
necessary.
5)
Keep vehicle at idling for 10 minutes, then check the voltage.
Or check the voltage when coasting from 80 km/h (50 MPH)
in 3rd gear position (M/T), D position with “SPORTS MODE
SW” OFF or without “MANUAL MODE” (CVT).
The voltage should be above 0.48V at least once during
this procedure.
6)
If NG, go to “Diagnostic Procedure”, EC-SR-191.
SEF032X
CONNECT
DTC P0138 HEATED OXYGEN SENSOR 2
(REAR) (MAX. VOLTAGE MONITORING)
SR20DE
Overall Function Check
EC-189
Wiring Diagram
NCEC0159
YEC086A
DTC P0138 HEATED OXYGEN SENSOR 2
(REAR) (MAX. VOLTAGE MONITORING)
SR20DE
Wiring Diagram
EC-190
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст