Nissan March K13. Manual - part 233

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-393

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

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1.

Stop the engine.

2.

Disconnect ECM harness connector. Check pin terminal and connector for damage, and then reconnect it.

>> GO TO 16.

16.

CHECK “A/F ALPHA-B1”

1.

Start engine.

2.

Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> Detect malfunctioning part according to 

XX-XX, "*****"

.

17.

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.
Is the measurement value within the SP value?

YES

>> INSPECTION END

NO-1

>> More than the SP value: GO TO 18.

NO-2

>> Less than the SP value: GO TO 25.

18.

DETECT MALFUNCTIONING PART

1.

Check for the cause of large engine friction. Refer to the following.

-

Engine oil level is too high

-

Engine oil viscosity

-

Belt tension of alternator, A/C compressor, etc. is excessive

-

Noise from engine

-

Noise from transmission, etc.

2.

Check for the cause of insufficient combustion. Refer to the following.

-

Valve clearance malfunction

-

Intake valve timing control function malfunction

-

Camshaft sprocket installation malfunction, etc.

>> Repair or replace malfunctioning part, and then GO TO 30.

19.

CHECK INTAKE SYSTEM

Check for the cause of uneven air flow passing through throttle body. Refer to the following.
• Crushed air ducts
• Malfunctioning seal of air cleaner element
• Uneven dirt of air cleaner element
• Improper specification of intake air system

Is the inspection result normal?

YES

>> GO TO 21.

NO

>> Repair or replace malfunctioning part, and then GO TO 20.

20.

CHECK “A/F ALPHA-B1”, AND “B/FUEL SCHDL”

Select “A/F ALPHA-B1” and “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the
each indication is within the SP value.

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> “B/FUEL SCHDL” is more, “A/F ALPHA-B1” is less than the SP value: GO TO 21

21.

DISCONNECT AND RECONNECT MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR HARNESS

CONNECTOR

1.

Stop the engine.

2.

Disconnect manifold absolute pressure (MAP) sensor harness connector. Check pin terminal and connec-
tor for damage and then reconnect it again.

EC-394

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

>> GO TO 22.

22.

CHECK “A/F ALPHA-B1”

1.

Start engine.

2.

Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.

Is the measurement value within the SP value?

YES

>> Detect malfunctioning part of manifold absolute pressure (MAP) sensor circuit and repair it. Refer

to 

XX-XX, "*****"

. Then GO TO 29.

NO

>> GO TO 23.

23.

CHECK “TURBO BST SEN”

Select “TURBO BST SEN” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value. Refer to 

EC-402, "Component Inspection"

.

Is the measurement value within the SP value?

YES

>> GO TO 24.

NO

>> More than the SP value: Replace manifold absolute pressure (MAP) sensor, and then GO TO 29.

24.

REPLACE ECM

1.

Replace ECM.

2.

Go to 

XX-XX, "*****"

.

>> GO TO 29.

25.

CHECK INTAKE SYSTEM

Check for the cause of uneven air flow through manifold absolute pressure (MAP) sensor. Refer to the follow-
ing.
• Crushed air ducts
• Malfunctioning seal of air cleaner element
• Uneven dirt of air cleaner element
• Improper specification of intake air system

Is the inspection result normal?

YES

>> GO TO 27.

NO

>> Repair or replace malfunctioning part, and then GO TO 26.

26.

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> Less than the SP value: GO TO 27.

27.

CHECK “TURBO BST SEN”

Select “TURBO BST SEN” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.

Is the measurement value within the SP value?

YES

>> GO TO 28.

NO

>> Less than the SP value: Replace manifold absolute pressure (MAP) sensor, and then GO TO 30.

28.

CHECK INTAKE SYSTEM

Check for the cause of air leakage after the manifold absolute pressure (MAP) sensor. Refer to the following.
• Disconnection, looseness, and cracks in air duct
• Looseness of oil filler cap
• Disconnection of oil level gauge
• Open stuck, breakage, hose disconnection, or cracks of PCV valve
• Disconnection or cracks of EVAP purge hose, open stuck of EVAP canister purge volume control solenoid

valve

• Malfunctioning seal of rocker cover gasket

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-395

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

C

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• Disconnection, looseness, or cracks of hoses, such as vacuum hose, connecting to intake air system parts
• Malfunctioning seal of intake air system, etc.

>> GO TO 30.

29.

CHECK “A/F ALPHA-B1” AND “B/FUEL SCHDL”

Select “A/F ALPHA-B1” and “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the
indication is within the SP value. 

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> Detect malfunctioning part according to 

XX-XX, "*****"

.

30.

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and then make sure that the indication is
within the SP value.

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> Detect malfunctioning part according to 

XX-XX, "*****"

.

EC-396

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000006037299

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 ECM GROUND CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connectors.

2.

Check the continuity between ECM harness connector and ground.

3.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check harness for open or short between ECM and ground.

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

4.

CHECK ECM POWER SUPPLY CIRCUIT-I

1.

Reconnect ECM harness connectors.

2.

Turn ignition switch ON.

3.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check harness for open or short between ECM and fuse.

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

6.

CHECK ECM POWER SUPPLY CIRCUIT-II

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON and then OFF.
Check the voltage between ECM harness connector and ground.

ECM

Ground

Continuity

Connector

Terminal

F7

10

Ground

Existed

11

E18

107

ECM

Ground

Voltage

Connector

Terminal

E18

93

Ground

Battery voltage