2001 NISSAN X-TRAIL Service Repair Manual

oil change air filter tow bar instrument panel night vision open bonnet

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NISSAN X-TRAIL 2001 Service Repair Manual DTC P0100 MASS AIR FLOW SENSOR (MAFS)
EC-1451
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DTC P0100 MASS AIR FLOW SENSOR (MAFS)PFP:22680
Component DescriptionEBS004Q0
The mass air flow sensor (MAFS) is plac

DTC P0100 MASS AIR FLOW SENSOR (MAFS)
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DTC P0100 MASS AIR FLOW SENSOR (MAFS)PFP:22680
Component DescriptionEBS004Q0
The mass air flow sensor (MAFS) is placed in the stream of intake
air. It measures the intake air flow rate by measuring a part of the
entire intake air flow. It consists of a hot film that is supplied with
electric current from the ECM. The temperature of the hot film is con-
trolled by the ECM a certain amount. The heat generated by the hot
film is reduced as the intake air flows around it. The more air, the
greater the heat loss.
Therefore, the ECM must supply more electric current to maintain
the temperature of the hot film as air flow increases. The ECM
detects the air flow by means of this current change.
CONSULT-II Reference Value in Data Monitor ModeEBS004Q1
Specification data are reference values.
ECM Terminals and Reference ValueEBS00BR6
Specification data are reference values, and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
SEF987W
MONITOR ITEM CONDITION SPECIFICATION
MAS AIR/FL SE
●Engine: After warming up
●Air conditioner switch: “OFF”
●Shift lever: Neutral position
●No-loadIdle 1.0 - 2.5V
2,000 rpm 2.1 - 2.7V
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A8
A9R
RPower supply for ECM[Ignition switch "ON"]BATTERY VOLTAGE
(11 - 14V)
A10 R Mass air flow sensor[Engine is running]
●Warm-up condition
●Idle speed0.5 - 2.5V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm1.5 - 3.5V
A24 BMass air flow sensor
ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
A27 W Sensor's power supply[Ignition switch "ON"]Approximately 5V
PBIB0389E
PBIB0390E

Page 1802 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-1452
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DTC P0100 MASS AIR FLOW SENSOR (MAFS)
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
On Board Diagnosis LogicEBS004Q3
DTC Confirmation Procedu

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NISSAN X-TRAIL 2001 Service Repair Manual DTC P0100 MASS AIR FLOW SENSOR (MAFS)
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Wiring DiagramEBS004Q5
TBWA0102E

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NISSAN X-TRAIL 2001 Service Repair Manual EC-1454
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DTC P0100 MASS AIR FLOW SENSOR (MAFS)
Diagnostic Procedure
EBS004Q6
1. CHECK MAFS POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect mass air flow sensor harness connec

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NISSAN X-TRAIL 2001 Service Repair Manual DTC P0100 MASS AIR FLOW SENSOR (MAFS)
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5.CHECK MAFS INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity betwe

Page 1806 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual EC-1456
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DTC P0115 ENGINE COOLANT TEMPERATURE (ECT) SENSOR (CIRCUIT)
DTC P0115 ENGINE COOLANT TEMPERATURE (ECT) SENSOR (CIRCUIT)
PFP:22630
DescriptionEBS004Q8
The engine coolant temperature

Page 1807 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual DTC P0115 ENGINE COOLANT TEMPERATURE (ECT) SENSOR (CIRCUIT)
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Wiring DiagramEBS004QB
TBWA0103E

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NISSAN X-TRAIL 2001 Service Repair Manual EC-1458
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DTC P0115 ENGINE COOLANT TEMPERATURE (ECT) SENSOR (CIRCUIT)
Diagnostic Procedure
EBS004QC
1. CHECK ECTS POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect engine coolan

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