Nissan Frontier D22. Instruction — part 477
DTC P1143, P1163 HO2S1
EC-1011
[VG33E]
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EC
4.
CHECK HEATED OXYGEN SENSOR 1 HEATER
1.
Stop engine.
2.
Check heated oxygen sensor 1 harness protector color.
3.
Check resistance between HO2S1 terminals 3 and 1.
4.
Check continuity between HO2S1 terminals 2 and 1, 3 and 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 sys-
tem threads using Oxygen Sensor Thread Cleaner tool J-
43897-18 or J-43897-12 and approved anti-seize lubricant.
OK or NG
OK (With CONSULT-II)>>GO TO 5.
OK (Without CONSULT-II)>>GO TO 6.
NG
>> Replace malfunctioning heated oxygen sensor 1.
PBIB0636E
Resistance: 2.3 - 4.3
Ω at 25°C (77°F)
Continuity should not exist.
AEC158A
EC-1012
[VG33E]
DTC P1143, P1163 HO2S1
5.
CHECK HEATED OXYGEN SENSOR 1
With CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Select “MANU TRIG” in “DATA MONITOR” mode with CONSULT-II, and select “HO2S1 (B1)/(B2)” and
“HO2S1 MNTR (B1)/(B2)”.
3.
Hold engine speed at 2,000 rpm under no load during the following steps.
4.
Touch “RECORD” on CONSULT-II screen.
5.
Check the following.
–
“HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode changes
from “RICH” to “LEAN” to “RICH” more than 5 times in 10 sec-
onds.
5 times (cycles) are counted as shown below.
–
“HO2S1 (B1)/(B2)” voltage goes above 0.6V at least once.
–
“HO2S1 (B1)/(B2)” voltage goes below 0.3V at least once.
–
“HO2S1 (B1)/(B2)” voltage never exceeds 1.0V.
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 7.
NG
>> Replace malfunctioning heated oxygen sensor 1.
SEF967Y
SEF647Y
SEF648Y
DTC P1143, P1163 HO2S1
EC-1013
[VG33E]
C
D
E
F
G
H
I
J
K
L
M
A
EC
6.
CHECK HEATED OXYGEN SENSOR 1
Without CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Set voltmeter probes between ECM terminal 50 (bank 1 signal) or 51 (bank 2 signal) and engine ground.
3.
Check the following with engine speed held at 2,000 rpm con-
stant under no load.
●
The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V more
than 5 times within 10 seconds.
●
The maximum voltage is over 0.6V at least 1 time.
●
The minimum voltage is below 0.3V at least 1 time.
●
The voltage never exceeds 1.0V.
1 time: 0 - 0.3V
→ 0.6 - 1.0V → 0 - 0.3V
2 times: 0 - 0.3V
→ 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V
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 7.
NG
>> Replace malfunctioning heated oxygen sensor 1.
7.
CHECK INTERMITTENT INCIDENT
Refer to
EC-696, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
For circuit, refer to
.
>> INSPECTION END.
Removal and Installation
UBS00DN5
HEATED OXYGEN SENSOR 1
Refer to
EM-80, "OUTER COMPONENT PARTS"
.
PBIB2157E
EC-1014
[VG33E]
DTC P1144, P1164 HO2S1
DTC P1144, P1164 HO2S1
PFP:22690
Component Description
UBS00DN6
The heated oxygen sensor 1 is placed into the front tube. It detects
the amount of oxygen in the exhaust gas compared to the outside
air. The heated oxygen sensor 1 has a closed-end tube made of
ceramic zirconia. The zirconia generates voltage from approximately
1V in richer conditions to 0V in leaner conditions. The heated oxygen
sensor 1 signal is sent to the ECM. The ECM adjusts the injection
pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel
ratio occurs near the radical change from 1V to 0V.
CONSULT-II Reference Value in Data Monitor Mode
UBS00DN7
Specification data are reference values.
On Board Diagnosis Logic
UBS00DN8
To judge the malfunction, the output from the heated oxygen sensor
1 is monitored to determine whether the “rich” output is sufficiently
high. The “lean” output is sufficiently low. When both the outputs are
shifting to the rich side, the malfunction will be detected.
SEF463R
SEF288D
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S1 (B1)
HO2S1 (B2)
●
Engine: After warming up
Maintaining engine speed at 2,000
rpm
0 - 0.3V
←→ Approx. 0.6 - 1.0V
HO2S1 MNTR
(B1)
HO2S1 MNTR
(B2)
LEAN
←→ RICH
Changes more than 5 times during
10 seconds.
SEF299U
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1144
(Bank 1)
Heated oxygen sensor
1 rich shift monitoring
The maximum and minimum voltages from the
sensor are beyond the specified voltages.
●
Heated oxygen sensor 1
●
Heated oxygen sensor 1 heater
●
Fuel pressure
●
Fuel injector
P1164
(Bank 2)
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