Nissan Qashqai (2007-2010). Manual — part 238

P0134 HO2S1

EC-471

< COMPONENT DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

PERFORM DTC CONFIRMATION PROCEDURE-I

With CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Select "MANU TRIG" in "DATA MONITOR" mode with CONSULT-III, and select "HO2S1 (B1)".

3.

Hold engine speed at 2,000 rpm under no load.

4.

Make sure that the indications do not remain in the range between 0.2V to 0.4V.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Go to

EC-765, "Diagnosis Procedure"

.

3.

PERFORM COMPONENT FUNCTION CHECK

Without CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Set volmeter probes between ECM harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Go to

EC-765, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001096816

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E21. Refer to Ground Inspection in

GI-41, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Disconnect heated oxygen sensor 1 harness connector.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between HO2S1 harness connector and ECM harness connector.

4.

Also check harness for short to ground and short to power.

Is inspection result normal?

YES

>> GO TO 3.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.

CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between HO2S1 harness connector and ECM harness connector 49.

ECM

Ground

Condition

Voltage

Connector

Terminal

F8

49

(HO2S1 signal)

Ground

Engine speed held at 2,000

rpm constant under no load.

• The voltage dose not remain in the range of 0.2 to 0.4.

HO2S1

ECM

Continuity

Connector

Terminal

Connector

Terminal

F30

1

F8

56

Existed

EC-472

< COMPONENT DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

P0134 HO2S1

2.

Check harness continuity between ECM harness connector 49 or HO2S1 harness connector and ground.

3.

Also check harness for short to power.

Is inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

4.

CHECK HEATED OXYGEN SENSOR 1

Refer to

EC-473, "Component Inspection"

.

Is inspection result normal?

YES

>> GO TO 5.

NO

>> Replace heated oxygen sensor 1.

5.

CHECK INTERMITTENT INCIDENT

Refer to

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001096817

1.

INSPECTION START

Do you have CONSULT-III?
Do you have CONSULT-III?

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

CHECK HEATED OXYGEN SENSOR 1

With CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Set “POST TRIGGER” to 100% in “DATA MONITOR” mode with CONSULT-III.

3.

Select “HO2S1 (B1)” and “HO2S1 MNTR (B1)”.

4.

Hold engine speed at 2,000 rpm under no load during the following steps.

5.

Touch “RECORD” on CONSULT-III screen.

6.

Check the following.

-

“HO2S1 MNTR (B1)” in “DATA MONITOR” mode changes from
“RICH” to “LEAN” to “RICH” more than 5 times in 10 seconds.

5 times (cycles) are counted as shown in the figure.

-

“HO2S1 (B1)” voltage goes above 0.6V at least once.

-

“HO2S1 (B1)” voltage goes below 0.3V at least once.

-

“HO2S1 (B1)” voltage never exceeds 1.0V.

HO2S1

ECM

Continuity

Connector

Terminal

Connector

Terminal

F30

4

F8

49

Existed

HO2S1

ECM

Ground

Continuity

Connector

Terminal

Connector

Terminal

F30

4

F8

49

Ground

Not existed

SEF217YA

P0134 HO2S1

EC-473

< COMPONENT DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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 and approved anti-seize lubricant.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 4.

3.

CHECK HEATED OXYGEN SENSOR 1

Without CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Check the voltage between ECM harness connector and ground under the following condition.

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 and approved anti-seize lubricant.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 4.

4.

REPLACE HEATED OXYGEN SENSOR 1

Replace heated oxygen sensor 1.

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 and approved anti-seize lubricant.

>> INSPECTION END

JMBIA0352ZZ

ECM

ground

Condition

Voltage

Connector

Terminal

F8

49

(HO2S1 signal)

Ground

Engine speed held at 2,000
rpm constant 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

EC-474

< COMPONENT DIAGNOSIS >

[HR16DE (WITHOUT EURO-OBD)]

P0138 HO2S2

P0138 HO2S2

Description

INFOID:0000000001096822

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.

DTC Logic

INFOID:0000000001096823

DTC DETECTION LOGIC

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 of the three way catalyst (manifold) causes the longer switching time.
To judge the malfunctions of heated oxygen sensor 2, ECM monitors
whether the voltage is unusually high during the various driving con-
dition such as fuel-cut.

DTC CONFIRMATION PROCEDURE

1.

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.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

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 2 minutes.

5.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to

EC-476, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001096824

SEF327R

PBIB1848E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0138

Heated oxygen sensor 2
circuit high voltage

An excessively high voltage from the sensor
is sent to ECM.

• Harness or connectors

(The sensor circuit is open or shorted)

• Heated oxygen sensor 2