Nissan March K13. Manual - part 165

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-121

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 1)]

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3.

Check pin terminal and connector for damage, and then reconnect it again.

>> 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 mass air flow sensor circuit and repair it. Refer to 

EC-137, "DTC

Logic"

. Then GO TO 29.

NO

>> GO TO 23.

23.

CHECK “MAS A/F SE-B1”

Select “MAS A/F SE-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

>> GO TO 24.

NO

>> More than the SP value: Replace mass air flow sensor (refer to 

EM-24, "Exploded View"

), and

then GO TO 29.

24.

REPLACE ECM

1.

Replace ECM. Refer to 

EC-312, "Exploded View"

.

2.

Perform 

EC-103, "Work Procedure"

.

>> GO TO 29.

25.

CHECK INTAKE SYSTEM

Check for the cause of uneven air flow through mass air flow sensor. 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 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 “MAS A/F SE-B1”

Select “MAS A/F SE-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

>> GO TO 28.

NO

>> Less than the SP value: Replace mass air flow sensor (refer to 

EM-24, "Exploded View"

), and

then GO TO 30.

28.

CHECK INTAKE SYSTEM

Check for the cause of air leak after the mass air flow 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

EC-122

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 1)]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

• Disconnection or cracks of EVAP purge hose, open stuck of EVAP canister purge volume control solenoid

valve

• Malfunctioning seal of rocker cover gasket
• 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
each indication is within the SP value. 

Is the measurement value within the SP value?

YES

>> INSPECTION END

NO

>> Detect malfunctioning part according to 

EC-299, "Symptom Table"

.

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 

EC-299, "Symptom Table"

.

POWER SUPPLY AND GROUND CIRCUIT

EC-123

< DTC/CIRCUIT DIAGNOSIS >

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POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000005989226

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to Ground Inspection in 

GI-35, "Circuit Inspection"

.

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

EC-124

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 1)]

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 9.

7.

CHECK ECM POWER SUPPLY CIRCUIT-III

1.

Turn ignition switch ON.

2.

Check the voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace IPDM E/R. Refer to 

PCS-52, "Exploded View"

.

8.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-33, "Intermittent Incident"

.

>> Repair or replace malfunctioning part.

9.

CHECK ECM POWER SUPPLY CIRCUIT-IV

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> GO TO 10.

10.

CHECK ECM POWER SUPPLY CIRCUIT-V

1.

Disconnect ECM harness connector.

2.

Disconnect IPDM E/R harness connector F113.

3.

Check the continuity between ECM harness connector and IPDM E/R harness connector.

4.

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

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 11.

11.

DETECT MALFUNCTIONING PART

Check harness for open or short between ECM and IPDM E/R.

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

ECM

Ground

Voltage

Connector

Terminal

E18

105

Ground

After turning ignition switch OFF, battery voltage will 
exist for a few seconds, then drop to approximately 0 V.

IPDM E/R

Ground

Voltage

Connector

Terminal

F115

75

Ground

Battery voltage

ECM

Ground

Voltage

Connector

Terminal

F7

32

Ground

Battery voltage

ECM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

F7

32

F113

50

Existed