Nissan Frontier D22. Manual — part 629
DTC P1146, P1166 HO2S2
EC-1619
[VG33ER]
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7.
CHECK HEATED OXYGEN SENSOR 2
Without CONSULT-II
1.
Start engine 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.
Set voltmeter probes between ECM terminal 56 [HO2S2 (B1) signal] or 57 [HO2S2 (B2) signal] and
engine ground.
6.
Check the voltage when revving 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 0.62V at least once during this
procedure.
If the voltage is above 0.62V at step 6, step 7 is not neces-
sary.
7.
Keep vehicle at idling for 10 minutes, then check voltage. Or
check the voltage when coasting from 80 km/h (50 MPH) in D
position with “OD” OFF (A/T), 3rd gear position (M/T).
The voltage should be below 0.48V at least once during this
procedure.
8.
If NG, 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 J-43897-18 or J-43897-12 and approved anti-seize lubricant.
OK or NG
OK
>> GO TO 8.
NG
>> Replace malfunctioning heated oxygen sensor 2.
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END.
Removal and Installation
UBS00E0B
HEATED OXYGEN SENSOR 2
Refer to
.
PBIB1437E
EC-1620
[VG33ER]
DTC P1147, P1167 HO2S2
DTC P1147, P1167 HO2S2
PFP:226A0
Component Description
UBS00E0C
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.
CONSULT-II Reference Value in Data Monitor Mode
UBS00E0D
Specification data are reference values.
On Board Diagnosis Logic
UBS00E0E
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 before the three way catalyst (manifold) causes the
longer switching time. To judge the malfunctions of heated oxygen
sensor 2, ECM monitors whether the maximum voltage of the sensor
is sufficiently high during the various driving condition such as fuel-
cut.
DTC Confirmation Procedure
UBS00E0F
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.
TESTING CONDITION:
Open engine hood before conducting following procedure
WITH CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
SEF327R
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S2 (B1)
HO2S2 (B2)
●
Warm-up condition
●
After keeping engine speed
between 3,500 and 4,000 rpm for
1 minute and at idle for 1 minute
under no load.
Revving engine from idle up to
3,000 rpm quickly
0 - 0.3V
←→ Approx. 0.6 - 1.0V
HO2S2 MNTR
(B1)
HO2S2 MNTR
(B2)
LEAN
←→ RICH
SEF303UB
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1147
(Bank 1)
Heated oxygen sensor 2
maximum voltage monitoring
The maximum 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
P1167
(Bank 2)
DTC P1147, P1167 HO2S2
EC-1621
[VG33ER]
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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.
Select “HO2S2 (B1) P1147” or “HO2S2 (B2) P1167” of “HO2S2” in “DTC WORK SUPPORT” mode with
CONSULT-II.
6.
Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”.
If “NG” is displayed, refer to
EC-1626, "Diagnostic Procedure"
If “CAN NOT BE DIAGNOSED” is displayed, perform the following.
a.
Stop engine and cool down until “COOLAN TEMP/S” indicates less than 70
°C (158°F).
b.
Turn ignition switch ON.
c.
Select “DATA MONITOR” mode with CONSULT-II.
d.
Start engine.
e.
Return to step 6 again when the “COOLAN TEMP/S” reaches to 70
°C (158°F).
PBIB0819E
EC-1622
[VG33ER]
DTC P1147, P1167 HO2S2
Overall Function Check
UBS00E0G
Use this procedure to check the overall function of the heated oxygen sensor 2 circuit. During this check, a
DTC might not be confirmed.
CAUTION:
Always drive vehicle at a safe speed.
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.
Set voltmeter probes between ECM terminal 56 [HO2S2 (B1) signal] or 57 [HO2S2 (B2) signal] and
engine ground.
6.
Check the voltage when revving 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 0.62V at least once during this
procedure.
If the voltage can be confirmed in step 6, step 7 is not nec-
essary.
7.
Keep vehicle at idling for 10 minutes, then check the voltage. Or
check the voltage when coasting from 80 km/h (50 MPH) in D
position with “OD” OFF (A/T), 3rd gear position (M/T).
The voltage should be above 0.62V at least once during this
procedure.
8.
If NG, go to
EC-1626, "Diagnostic Procedure"
PBIB1437E
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