Nissan Tiida C11. Manual — part 398
EC-242
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
P1144 HO2S1
• 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
P1146 HO2S2
EC-243
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P1146 HO2S2
Description
INFOID:0000000001671012
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:0000000001671013
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 minimum voltage of the sensor
is sufficiently low during the various driving condition 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 step 2 in
Procedure for COND1.
CAUTION:
Always drive at safe speed.
SEF327R
PBIB0554E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1146
Heated oxygen sensor 2
minimum voltage moni-
toring
The minimum voltage from the sensor is not
reached to the specified voltage.
• Harness or connectors
(The sensor circuit is open or shorted)
• Heated oxygen sensor 2
• Fuel pressure
• Fuel injector
• Intake air leaks
EC-244
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
P1146 HO2S2
>> GO TO 3.
3.
PERFORM PROCEDURE FOR COND1-I
Start engine and warm it up to normal operating temperature.
>> GO TO 4.
4.
PERFORM PROCEDURE FOR COND1-II
Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 5.
5.
PERFORM PROCEDURE FOR COND1-IV
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) P1146” 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
ENG SPEED
More than 1,000 rpm
B/FUEL SCHDL
More than 1.0 msec
COOLAN TEMP/S
More than 70
°
C (158
°
F)
Shift level
Suitable position
P1146 HO2S2
EC-245
< COMPONENT DIAGNOSIS >
[HR16DE (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
CAN NOT BE DIAGNOSED>>GO TO 10.
10.
PERFORM PROCEDURE FOR COND3-II
1.
Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
2.
Turn ignition switch ON and select “COOLAN TEMP/S” in “DATA MONITOR” mode with CONSULT-III.
3.
Start engine and warm it up while monitoring “COOLAN TEMP/S” indication on CONSULT-III.
4.
When “COOLAN TEMP/S” indication reaches to 70
°
C (158
°
F).
>> GO TO 5.
11.
PREFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to
EC-245, "Component Function Check"
.
NOTE:
Use component function check the overall function of the heated oxygen sensor 2 circuit. During this check, a
1st trip DTC might not be confirmed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Component Function Check
INFOID:0000000001671014
1.
PERFORM COMPONENT FUNCTION CHECK-I
With GST
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 terminals as follows under the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
PERFORM COMPONENT FUNCTION CHECK-II
Check the voltage between ECM harness connector terminals as follows under the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 3.
3.
PERFORM COMPONENT FUNCTION CHECK-III
Check the voltage between ECM harness connector terminals as follows under the following condition.
(+)
(–)
Condition
Voltage
Connector
Terminal
Connector
Terminal
F11
50
(HO2S2 signal)
F11
59
Revving up to 4,000 rpm un-
der no load at least 10 times
The voltage should be above 0.68V at least
once during this procedure.
(+)
(–)
Condition
Voltage
Connector
Terminal
Connector
Terminal
F11
50
(HO2S2 signal)
F11
59
Keeping engine speed at idle
for 10 minutes
The voltage should be above 0.68V at least
once during this procedure.
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