Nissan March K13. Manual - part 260

HO2S2 HEATER

EC-501

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

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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

EC-502

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

IAT SENSOR

IAT SENSOR

Component Function Check

INFOID:0000000005886645

1.

CHECK INTAKE AIR TEMPERATURE SENSOR FUNCTION

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-502, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005886646

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to Ground Inspection in 

XX-XX, "*****"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect manifold absolute pressure (MAP) sensor (with intake air temperature sensor) harness con-
nector.

2.

Turn ignition switch ON.

3.

Check the voltage between manifold absolute pressure (MAP) sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

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

3.

CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between manifold absolute pressure (MAP) sensor harness connector and ECM har-
ness connector.

4.

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

Is the 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 INTAKE AIR TEMPERATURE SENSOR

ECM

Voltage

Connector

Terminal

+

−

F8

46

55

Approx. 0 - 4.8 V

MAF sensor

Ground

Voltage

Connector

Terminal

F4

2

Ground

Approx. 5 V

MAF sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F4

1

F8

55

Existed

IAT SENSOR

EC-503

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

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Refer to 

EC-503, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace manifold absolute pressure (MAP) sensor (with intake air temperature sensor).

5.

CHECK INTERMITTENT INCIDENT

Refer to 

XX-XX, "*****"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005886647

1.

CHECK INTAKE AIR TEMPERATURE SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect manifold absolute pressure (MAP) sensor harness connector.

3.

Check resistance between manifold absolute pressure (MAP) sensor terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace manifold absolute pressure (MAP) sensor (with intake air temperature sensor).

Terminals

Condition

Resistance

1 and 2

Temperature [

°

C (

°

F)]

25 (77)

1.800 - 2.200 k

Ω

EC-504

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

IGNITION SIGNAL

IGNITION SIGNAL

Component Function Check

INFOID:0000000006037473

1.

INSPECTION START

Turn ignition switch OFF, and restart engine.
Does the engine start?

YES-1 >> With CONSULT-III: GO TO 2.
YES-2 >> Without CONSULT-III: GO TO 3.
NO

>> Go to 

EC-504, "Diagnosis Procedure"

.

2.

IGNITION SIGNAL FUNCTION

With CONSULT-III

1.

Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.

2.

Make sure that each circuit produces a momentary engine speed drop.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-504, "Diagnosis Procedure"

.

3.

IGNITION SIGNAL FUNCTION

 Without CONSULT-III

1.

Let engine idle.

2.

Check the voltage signal between ECM harness connector and ground with an oscilloscope.

NOTE:
The pulse cycle changes depending on rpm at idle.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-504, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006037474

1.

CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF, wait at least 10 seconds and then turn ON.

2.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Go to 

EC-123, "Diagnosis Procedure"

.

ECM

Voltage signal

Connector

+

−

Terminal

Terminal

F7

17

108

18

21

22

JMBIA0219GB

ECM

Voltage

Connector

+

−

Terminal

Terminal

E16

105

108

Battery voltage