Nissan March K13. Manual — part 165
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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
. 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
), and
then GO TO 29.
24.
REPLACE ECM
1.
Replace ECM. Refer to
.
2.
.
>> 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
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
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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
.
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
.
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POWER SUPPLY AND GROUND CIRCUIT
EC-123
< DTC/CIRCUIT DIAGNOSIS >
[HR12DE (TYPE 1)]
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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
.
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
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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
.
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
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