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Nissan Teana J32. Manual - part 413

EC-190

< COMPONENT DIAGNOSIS >

[VQ25DE, VQ35DE]

P0138, P0158 HO2S2

Component Inspection

INFOID:0000000003856586

INSPECTION START

Will CONSULT-III be used?

YES

>> GO TO 2.

>> GO TO 3.

CHECK HEATED OXYGEN SENSOR 2

With CONSULT-III

Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.

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.

Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)/(B2)” as the monitor item
with CONSULT-III.

Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to

25%.

“HO2S2 (B1)/(B2)” should be above 0.68 V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.18 V at least once when the “FUEL INJECTION” is

−

25%.

Is the inspection result normal?

YES

>> INSPECTION END

>> GO TO 6.

CHECK HEATED OXYGEN SENSOR 2-I

Without CONSULT-III

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.

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

>> GO TO 4.

CHECK HEATED OXYGEN SENSOR 2-II

Check the voltage between ECM harness connector terminals under the following conditions.

PBIB3458E

ECM

Condition

Voltage

Connector

–

Terminal

[HO2S2 (bank 1)

signal]

(Sensor
ground)

Revving up to 4,000 rpm under no load at
least 10 times

The voltage should be above 0.68 V at
least once during this procedure.
The voltage should be below 0.18 V at
least once during this procedure.

[HO2S2 (bank 2)

signal]

P0138, P0158 HO2S2

EC-191

< COMPONENT DIAGNOSIS >

[VQ25DE, VQ35DE]

Is the inspection result normal?

YES

>> INSPECTION END

>> GO TO 5.

CHECK HEATED OXYGEN SENSOR 2-III

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

>> GO TO 6.

REPLACE HEATED OXYGEN SENSOR 2

Replace malfunctioning 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 and approved anti-seize lubricant.

>> INSPECTION END

ECM

Condition

Voltage

Connector

–

Terminal

[HO2S2 (bank 1)

signal]

(Sensor
ground)

Keeping engine at idle for 10 minutes

The voltage should be above 0.68 V at
least once during this procedure.
The voltage should be below 0.18 V at
least once during this procedure.

[HO2S2 (bank 2)

signal]

ECM

Condition

Voltage

Connector

–

Terminal

[HO2S2 (bank 1)

signal]

(Sensor
ground)

Coasting from 80 km/h (50 MPH) in D po-
sition

The voltage should be above 0.68 V at
least once during this procedure.
The voltage should be below 0.18 V at
least once during this procedure.

[HO2S2 (bank 2)

signal]

EC-192

< COMPONENT DIAGNOSIS >

[VQ25DE, VQ35DE]

P0139, P0159 HO2S2

P0139, P0159 HO2S2

Description

INFOID:0000000003856587

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 air fuel ratio (A/F) sensor 1
are shifted, the air-fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1 V in richer conditions to 0 V in leaner con-
ditions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.

DTC Logic

INFOID:0000000003856588

DTC DETECTION LOGIC

The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxy-
gen 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 switching response of the sen-
sor's voltage is faster than specified during various driving conditions
such as fuel cut.

DTC CONFIRMATION PROCEDURE

INSPECTION START

Will CONSULT-III be used?

YES

>> GO TO 2.

>> GO TO 5.

PRECONDITIONING

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 better results, perform “DTC WORK SUPPORT” at a temperature of 0 to 30

C (32 to 86

F).

>> GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III

SEF327R

SEF302U

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0139

Heated oxygen sensor 2
(bank 1) circuit slow re-
sponse

It takes more time for the sensor to respond be-
tween rich and lean than the specified time.

• Harness or connectors

(The sensor circuit is open or shorted)

• Heated oxygen sensor 2
• Fuel pressure
• Fuel injector
• Intake air leaks

P0159

Heated oxygen sensor 2
(bank 2) circuit slow re-
sponse

P0139, P0159 HO2S2

EC-193

< COMPONENT DIAGNOSIS >

[VQ25DE, VQ35DE]

Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.

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.

Open engine hood.

Select “HO2S2 (B1) P0139” or “HO2S2 (B2) P0159” of “HO2S2” in “DTC WORK SUPPORT” mode with
CONSULT-III.

Follow the instruction of CONSULT-III.
NOTE:
It will take at most 10 minutes until “COMPLETED” is displayed.

Touch “SELF-DIAG RESULTS”.

Which is displayed on CONSULT-III screen?

>> INSPECTION END

>> Go to

EC-194, "Diagnosis Procedure"

CAN NOT BE DIAGNOSED>>GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE AGAIN

Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).

Perform DTC confirmation procedure again.

>> GO TO 3.

PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to

EC-193, "Component Function Check"

NOTE:
Use component function check to 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

>> Go to

EC-194, "Diagnosis Procedure"

Component Function Check

INFOID:0000000003856589

PERFORM COMPONENT FUNCTION CHECK-I

Without CONSULT-III

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.

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

>> GO TO 2.

PERFORM COMPONENT FUNCTION CHECK-II

Check the voltage between ECM harness connector terminals under the following conditions.

DTC

ECM

Condition

Voltage

Connec-

tor

–

Terminal

P0139

[HO2S2 (bank 1)

signal]

(Sensor
ground)

Revving up to 4,000 rpm under no
load at least 10 times

A change of voltage should be more
than 0.12 V for 1 second during this
procedure.

P0159

[HO2S2 (bank 2)

signal]

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