Nissan Frontier D22. Manual - part 624

 

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Nissan Frontier D22. Manual - part 624

 

 

DTC P1143, P1163 HO2S1

EC-1599

[VG33ER]

C

D

E

F

G

H

I

J

K

L

M

A

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

 at 25°C (77°F)

Continuity should not exist.

AEC158A

EC-1600

[VG33ER]

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 CON-
SULT-II, and select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/
(B2)”.

3.

Hold engine speed at 2,000 rpm under no load during the follow-
ing 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-1601

[VG33ER]

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 [HO2S1 (B1) signal] or 51 [NO2S1 (B2) 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-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

For circuit, refer to  

EC-1377, "Wiring Diagram"

 .

>> INSPECTION END.

Removal and Installation

UBS00DZW

HEATED OXYGEN SENSOR 1

Refer to 

EM-80, "OUTER COMPONENT PARTS"

 .

PBIB2157E

EC-1602

[VG33ER]

DTC P1144, P1164 HO2S1

DTC P1144, P1164 HO2S1

PFP:22690

Component Description

UBS00DZX

The heated oxygen sensor 1 is placed into the exhaust manifold. 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

UBS00DZY

Specification data are reference values.

On Board Diagnosis Logic

UBS00DZZ

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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