Nissan Qashqai (2007-2010). Manual — part 181
P1146 HO2S2
EC-243
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
C
D
E
F
G
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EC
N
P
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7.
Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to
±
25%.
“HO2S2 (B1)” should be above 0.68V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)” should be below 0.50V at least once when the “FUEL INJECTION” is
−
25%.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 6.
3.
CHECK HEATED OXYGEN SENSOR 2-I
Without CONSULT-III
1.
Start engine and warm it up to the normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4.
Let engine idle for 1 minute.
5.
Check the voltage between ECM harness connector and ground under the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 4.
4.
CHECK HEATED OXYGEN SENSOR 2-II
Check the voltage between ECM harness connector and ground under the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 5.
5.
CHECK HEATED OXYGEN SENSOR 2-III
Check the voltage between ECM harness connector and ground under the following condition.
PBIB0551E
ECM
Ground
Condition
Voltage
Connector
Terminal
F8
50
(HO2S2 signal)
Ground
Revving up to 4,000 rpm under no load at
least 10 times
The voltage should be above 0.68V at
least once during this procedure.
The voltage should be below 0.50V at least
once during this procedure.
ECM
Ground
Condition
Voltage
Connector
Terminal
F8
50
(HO2S2 signal)
Ground
Keeping engine speed at idle for 10 min-
utes
The voltage should be above 0.68V at
least once during this procedure.
The voltage should be below 0.50V at least
once during this procedure.
EC-244
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
P1146 HO2S2
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 6.
6.
REPLACE HEATED OXYGEN SENSOR 2
Replace heated oxygen sensor 2.
CAUTION:
• Discard any heated oxygen 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 oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool and approved anti-seize lubricant.
>> INSPECTION END
ECM
Ground
Condition
Voltage
Connector
Terminal
F8
50
(HO2S2 signal)
Ground
Coasting from 80 km/h (50 MPH) in 4th
gear position
The voltage should be above 0.68V at
least once during this procedure.
The voltage should be below 0.50V at least
once during this procedure.
P1147 HO2S2
EC-245
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
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M
A
EC
N
P
O
P1147 HO2S2
Description
INFOID:0000000001088484
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas on each bank.
Even if switching characteristics of the heated oxygen sensor 1 are
shifted, the air-fuel ratio is controlled to stoichiometric, by the signal
from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1V in richer conditions to 0V in leaner condi-
tions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.
DTC Logic
INFOID:0000000001088485
DTC DETECTION LOGIC
The heated oxygen sensor 2 has a much longer switching time between rich and lean than the heated oxygen
sensor 1. The oxygen storage capacity of the three way catalyst (manifold) causes the longer switching time.
To judge the malfunctions of heated oxygen sensor 2, ECM monitors
whether the voltage is unusually high during the various driving con-
dition such as fuel-cut.
DTC CONFIRMATION PROCEDURE
1.
INSPECTION START
Do you have CONSULT-III?
Do you have CONSULT-III?
YES
>> GO TO 2.
NO
>> GO TO 11.
2.
PRECONDITIONING
“COMPLETED” will appear on CONSULT-III screen when all tests “COND1”, “COND2” and “COND3” are
completed.
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:
For the best results, perform DTC WORK SUPPORT at a temperature of 0 to 30
°
C (32 to 86
°
F).
Never stop engine during this procedure. If the engine is stopped, retry this procedure from 4. PER-
FORM PROCEDURE FOR COND1-I.
>> GO TO 3.
SEF327R
PBIB1848E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1147
Heated oxygen sensor 2
circuit high voltage
An excessively high voltage from the sensor
is sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted)
• Heated oxygen sensor 2
EC-246
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
P1147 HO2S2
3.
PERFORM PROCEDURE FOR COND1
Start engine and warm it up to normal operating temperature.
>> GO TO 4.
4.
PERFORM PROCEDURE FOR COND1-I
Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 5.
5.
PERFORM PROCEDURE FOR COND1-II
1.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
2.
Let engine idle 1 minute.
3.
Select “HO2S2 (B1) P1147” of “HO2S2” in “DTC WORK SUPPORT” mode with CONSULT-III.
4.
Touch “START”.
5.
Start engine and let it idle for at least 30 seconds.
6.
Rev engine up to 2,000 rpm two or three times quickly under no load.
Is “CONPLETED” appears on CONSULT-III screen?
YES
>> GO TO 9.
NO
>> GO TO 6.
6.
PERFORM PROCEDURE FOR COND1-I
When the following conditions are met, “TESTING” will be displayed at “COND1” on the CONSULT-III screen.
Maintain the condition continuously until “TESTING” changes to “COMPLETED” (It will take approximately 60
seconds.)
Which displayed on CONSULT-III screen?
COND1: OUT OF CONDITION>>GO TO 4.
COND1: COMPLETED COND2: INCOMPLETED>>GO TO 7.
COND1: COMPLETED COND2: COMPLETED>>GO TO 8.
7.
PERFORM PROCEDURE FOR COND2
While driving, release accelerator pedal completely from the above condition until “INCOMPLETED” at
“COND2” on CONSULT-III screen has turned to “COMPLETED”. (It will take approximately 4 seconds.)
Which displayed on CONSULT-III screen?
COND2: COMPLETED COND3: INCOMPLETED>>GO TO 8.
COND2: COMPLETED COND3: COMPLETED>>GO TO 9.
8.
PERFORM PROCEDURE FOR COND3
Stop vehicle and let it idle until “INCOMPLETED” of “COND3” on CONSULT-III screen has turned to “COM-
PLETED”. (It will take a maximum of approximately 6 minutes.)
>> GO TO 9.
9.
PERFORM PROCEDURE FOR COND3-I
Touch “SELF DIAGRESULTS”.
Which displayed on CONSULT-III screen?
OK
>> INSPECTION END
NG >> Go
CAN NOT BE DIAGNOSED>>GO TO 10.
ENG SPEED
More than 1,200 rpm
B/FUEL SCHDL
More than 1.0 msec
COOLAN TEMP/S
More than 70
°
C (158
°
F)
Shift level
Suitable position
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