Nissan March K13. Manual — part 259

HO2S2

EC-497

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

C

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A

EC

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Component Inspection

INFOID:0000000006037468

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 2

With CONSULT-III

1.

Turn ignition switch ON and select “ENGINE” using CONSULT-III.

2.

Select “DATA MONITOR” mode.

3.

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

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

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

6.

Let engine idle for 1 minute.

7.

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

8.

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

±

25%.

“HO2S2 (B1)” should be above 0.68 V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)” should be below 0.36 V at least once when the “FUEL INJECTION” is

−

25%.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 6.

3.

CHECK HEATED OXYGEN SENSOR 2-I

Without CONSULT-III

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 1 minute.

5.

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

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 4.

4.

CHECK HEATED OXYGEN SENSOR 2-II

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

JSBIA0082GB

ECM

Condition

Voltage

Connector

+

–

Terminal

Terminal

F16

50

(HO2S2)

59

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 0.36 V at
least once during this procedure.

EC-498

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

HO2S2

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 5.

5.

CHECK HEATED OXYGEN SENSOR 2-III

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

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning heated oxygen sensor 2. Refer to

EX-5, "Exploded View"

.

ECM

Condition

Voltage

Connector

+

–

Terminal

Terminal

F16

50

(HO2S2)

59

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 0.36 V at
least once during this procedure.

ECM

Condition

Voltage

Connector

+

–

Terminal

Terminal

F16

50

(HO2S2)

59

Coasting from 80 km/h (50 MPH) in 4th
gear position

The voltage should be above 0.68 V at
least once during this procedure.
The voltage should be below 0.36 V at
least once during this procedure.

HO2S2 HEATER

EC-499

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

C

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HO2S2 HEATER

Component Function Check

INFOID:0000000005886642

1.

CHECK HEATED OXYGEN SENSOR 2 HRATER FUNCTION

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 let it idle.

4.

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

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to

EC-499, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005886643

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E21. Refer to Ground Inspection in

XX-XX, "*****"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK HO2S2 HEATER POWER SUPPLY CIRCUIT

1.

Disconnect HO2S2 harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between HO2S2 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E6, F1
• IPDM E/R connector E14
• 10 A fuse (No. 61)

ECM

Condition

Voltage signal

Connector

Terminal

+

−

F7

5

(HO2S2 heater signal)

108

At idle

Approx. 10V

Engine speed: Above 3,900 rpm

BATTERY VOLTAGE

(11 - 14V)

JMBIA0214GB

HO2S2

Ground

Voltage

Connector

Terminal

F45

2

Ground

Battery voltage

EC-500

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

HO2S2 HEATER

• Harness for open or short between heated oxygen sensor 2 and IPDM E/R

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

4.

CHECK HO2S2 HEATER OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between HO2S2 harness connector and ECM harness connector.

4.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK HO2S2 HEATER

Refer to

EC-500, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

REPLACE HEATED OXYGEN SENSOR 2

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 heated oxygen sensor, clean exhaust system threads using Oxygen Sensor

Thread Cleaner (commercial service tool) and approved Anti-seize Lubricant (commercial service
tool).

>> INSPECTION END

7.

CHECK INTERMITTENT INCIDENT

Refer to

XX-XX, "*****"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005886644

1.

CHECK HEATED OXYGEN SENSOR 2 HEATER

1.

Turn ignition switch OFF.

2.

Disconnect heated oxygen sensor 2 harness connector.

3.

Check resistance between HO2S2 terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE HEATED OXYGEN SENSOR 2

HO2S2

ECM

Continuity

Connector

Terminal

Connector

Terminal

F45

3

F7

5

Existed

Terminals

Resistance [at 25

°

C (77

°

F)]

2 and 3

3.3 - 4.4

Ω

1 and 2, 3, 4

∞

Ω

(Continuity should not exist)

4 and 1, 2, 3