2004 INFINITI FX35 Service Manual

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Page 2169 of 4449

INFINITI FX35 2004 Service Manual EC-828
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DTC P0101 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
6. CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. C

Page 2170 of 4449

INFINITI FX35 2004 Service Manual DTC P0101 MAF SENSOR
EC-829
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Revision: 2004 November 2004 FX35/FX45
Component InspectionABS00C1A
MASS AIR FLOW SENSOR
1. Reconnect all harness connectors disconnected

Page 2171 of 4449

INFINITI FX35 2004 Service Manual EC-830
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DTC P0102, P0103 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC P0102, P0103 MAF SENSORPFP:22680
Component DescriptionABS00C1C
The mass air flow sensor is placed in the stream o

EC-830
[VK45DE]
DTC P0102, P0103 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC P0102, P0103 MAF SENSORPFP:22680
Component DescriptionABS00C1C
The mass air flow sensor is placed in the stream of intake air. It mea-
sures the intake flow rate by measuring a part of the entire intake
flow. It consists of a hot film that is supplied with electric current from
the ECM. The temperature of the hot film is controlled 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 ModeABS00C1D
Specification data are reference values.
On Board Diagnosis LogicABS00C1E
These self-diagnoses have the one trip detection logic.
NOTE:
If DTC P0102 or P0103 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229.
Refer to EC-1156
.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
SEC266C
MONITOR ITEM CONDITION SPECIFICATION
MAS A/F SE-B1 See EC-780, "
TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
CAL/LD VALUE
Engine: After warming up
Air conditioner switch: OFF
Shift lever: N
No loadIdle 14% - 33%
2,500 rpm 12% - 25%
MASS AIRFLOW
Engine: After warming up
Air conditioner switch: OFF
Shift lever: N
No loadIdle 2.0 - 6.0 g·m/s
2,500 rpm 7.0 - 20.0 g·m/s
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P0102
0102Mass air flow sensor
circuit low inputAn excessively low voltage from the sensor is
sent to ECM.
Harness or connectors
(The sensor circuit is open or shorted.)
Intake air leaks
Mass air flow sensor
P0103
0103Mass air flow sensor
circuit high inputAn excessively high voltage from the sensor is
sent to ECM.
Harness or connectors
(The sensor circuit is open or shorted.)
Mass air flow sensor
Detected items Engine operating condition in fail-safe mode
Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.

Page 2172 of 4449

INFINITI FX35 2004 Service Manual DTC P0102, P0103 MAF SENSOR
EC-831
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Revision: 2004 November 2004 FX35/FX45
DTC Confirmation ProcedureABS00C1F
NOTE:
If DTC Confirmation Procedure has been previously

Page 2173 of 4449

INFINITI FX35 2004 Service Manual EC-832
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DTC P0102, P0103 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS00C1G
TBWM0225E

Page 2174 of 4449

INFINITI FX35 2004 Service Manual DTC P0102, P0103 MAF SENSOR
EC-833
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Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.

Page 2175 of 4449

INFINITI FX35 2004 Service Manual EC-834
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DTC P0102, P0103 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
3. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
Ref

Page 2176 of 4449

INFINITI FX35 2004 Service Manual DTC P0102, P0103 MAF SENSOR
EC-835
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Revision: 2004 November 2004 FX35/FX45
6. CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disco

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