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Nissan Frontier D22. Manual - part 482

DTC P1146, P1166 HO2S2

EC-1031

[VG33E]

CHECK HEATED OXYGEN SENSOR 2

Without CONSULT-II

Start engine warm it up to the normal operating temperature.

Turn ignition switch OFF and wait at least 10 seconds.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

Let engine idle for 1 minute.

Set voltmeter probes between ECM terminal 56 [HO2S2 (B1) signal] or 57 [HO2S2 (B2) signal] and
engine ground.

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.

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.

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

>> GO TO 8.

>> Replace malfunctioning heated oxygen sensor 2.

CHECK INTERMITTENT INCIDENT

Refer to

EC-696, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

>> INSPECTION END.

Removal and Installation

UBS00DNK

HEATED OXYGEN SENSOR 2

Refer to

EX-3, "EXHAUST SYSTEM"

PBIB1437E

EC-1032

[VG33E]

DTC P1147, P1167 HO2S2

PFP:226A0

Component Description

UBS00DNL

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

UBS00DNM

Specification data are reference values.

On Board Diagnosis Logic

UBS00DNN

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

UBS00DNO

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

Start engine and warm it up to normal operating temperature.

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-1033

[VG33E]

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

Let engine idle for 1 minute.

Select “HO2S2 (B1) P1147” or “HO2S2 (B2) P1167” of “HO2S2” in “DTC WORK SUPPORT” mode with
CONSULT-II.

Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”.
If “NG” is displayed, refer to

EC-1037, "Diagnostic Procedure"

If “CAN NOT BE DIAGNOSED” is displayed, perform the following.

Stop engine and cool down until “COOLAN TEMP/S” indicates less than 70

°C (158°F).

Turn ignition switch ON.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine.

Return to step 6 again when the “COOLAN TEMP/S” reaches to 70

°C (158°F).

Overall Function Check

UBS00DNP

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

Start engine and warm it up to the normal operating temperature.

Turn ignition switch OFF and wait at least 10 seconds.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

Let engine idle for 1 minute.

Set voltmeter probes between ECM terminal 88 [HO2S2 (B1) signal] or 90 [HO2S2 (B2) signal] and
engine ground.

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.

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.

If NG, go to

EC-1037, "Diagnostic Procedure"

PBIB0819E

SEF922UA

EC-1034

[VG33E]

DTC P1147, P1167 HO2S2

Wiring Diagram

UBS00DNQ

BANK 1

BBWA1079E

Content .. 480 481 482 483 ..