Abs INFINITI FX35 2004 Service Manual
[x] Cancel search | Manufacturer: INFINITI, Model Year: 2004, Model line: FX35, Model: INFINITI FX35 2004Pages: 4449, PDF Size: 99.66 MB
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![INFINITI FX35 2004 Service Manual DTC P0101 MAF SENSOR
EC-167
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Revision: 2004 November 2004 FX35/FX45
7. Maintain the following conditions for at least 10 consecutive sec-
onds.
8. If DTC is detected, INFINITI FX35 2004 Service Manual DTC P0101 MAF SENSOR
EC-167
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7. Maintain the following conditions for at least 10 consecutive sec-
onds.
8. If DTC is detected,](/img/42/57021/w960_57021-1507.png)
DTC P0101 MAF SENSOR
EC-167
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7. Maintain the following conditions for at least 10 consecutive sec-
onds.
8. If DTC is detected, go to EC-169, "
Diagnostic Procedure" .
Overall Function CheckABS006M3
PROCEDURE FOR MALFUNCTION B
Use this procedure to check the overall function of the mass air flow sensor circuit. During this check, a DTC
might not be confirmed.
With GST
1. Start engine and warm it up to normal operating temperature.
2. Select MODE 1 with GST.
3. Check the mass air flow sensor signal with MODE 1.
4. Check for linear mass air flow sensor signal value rise in
response to increases to about 4,000 rpm in engine speed.
5. If NG, go to EC-169, "
Diagnostic Procedure" .
ENG SPEED More than 2,000 rpm
THRTL SEN 1 More than 3V
THRTL SEN 2 More than 3V
Selector lever Suitable position
Driving locationDriving vehicle uphill (Increased engine load) will help
maintain the driving conditions required for this test.
PBIB0199E
SEF534P
Page 1509 of 4449
![INFINITI FX35 2004 Service Manual EC-168
[VQ35DE]
DTC P0101 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006M4
TBWM0287E INFINITI FX35 2004 Service Manual EC-168
[VQ35DE]
DTC P0101 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006M4
TBWM0287E](/img/42/57021/w960_57021-1508.png)
EC-168
[VQ35DE]
DTC P0101 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006M4
TBWM0287E
Page 1510 of 4449
![INFINITI FX35 2004 Service Manual DTC P0101 MAF SENSOR
EC-169
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Specification data are reference values and are measured between each terminal and ground.
CAUTION INFINITI FX35 2004 Service Manual DTC P0101 MAF SENSOR
EC-169
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Specification data are reference values and are measured between each terminal and ground.
CAUTION](/img/42/57021/w960_57021-1509.png)
DTC P0101 MAF SENSOR
EC-169
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Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
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.
Diagnostic ProcedureABS00CGP
1. INSPECTION START
Which malfunction (A or B) is duplicated?
A or B
A>>GO TO 3.
B>>GO TO 2.
2. CHECK INTAKE SYSTEM
Check the following for connection.
Air duct
Va c u u m h o s e s
Intake air passage between air duct and intake manifold
OK or NG
OK >> GO TO 3.
NG >> Reconnect the parts.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
51 L/W Mass air flow sensor[Engine is running]
Warm-up condition
Idle speed0.9 - 1.2V
[Engine is running]
Warm-up condition
Engine speed is 2,500 rpm1.6 - 1.9V
67 B/WSensor ground
(Mass air flow sensor)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
111 W / BECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]
For a few seconds after turning ignition
switch OFF0 - 1.5V
[Ignition switch: OFF]
More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
11 9
120R
RPower supply for ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
Page 1513 of 4449
![INFINITI FX35 2004 Service Manual EC-172
[VQ35DE]
DTC P0101 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
Component InspectionABS006M6
MASS AIR FLOW SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and warm INFINITI FX35 2004 Service Manual EC-172
[VQ35DE]
DTC P0101 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
Component InspectionABS006M6
MASS AIR FLOW SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and warm](/img/42/57021/w960_57021-1512.png)
EC-172
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DTC P0101 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
Component InspectionABS006M6
MASS AIR FLOW SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Check voltage between ECM terminal 51 (Mass air flow sensor
signal) and ground.
*: Check for linear voltage rise in response to engine being increased to about
4,000 rpm.
4. If the voltage is out of specification, proceed the following.
Turn ignition switch OFF.
Disconnect mass air flow sensor harness connector and reconnect it again.
Perform steps 2 and 3 again.
5. If NG, remove mass air flow sensor from air duct. Check hot wire for damage or dust.
6. If NG, clean or replace mass air flow sensor.
Removal and InstallationABS006M7
MASS AIR FLOW SENSOR
Refer to EM-17, "AIR CLEANER AND AIR DUCT" .
Condition Voltage V
Ignition switch ON (Engine stopped.) Approx. 0.4
Idle (Engine is warmed-up to normal
operating temperature.)0.9 - 1.2
2,500 rpm (Engine is warmed-up to
normal operating temperature.)1.6 - 1.9
Idle to about 4,000 rpm* 0.9 - 1.2 to Approx. 2.4
PBIB1106E
Page 1514 of 4449
![INFINITI FX35 2004 Service Manual DTC P0102, P0103 MAF SENSOR
EC-173
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Revision: 2004 November 2004 FX35/FX45
DTC P0102, P0103 MAF SENSORPFP:22680
Component DescriptionABS006M8
The mass air flow sensor INFINITI FX35 2004 Service Manual DTC P0102, P0103 MAF SENSOR
EC-173
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Revision: 2004 November 2004 FX35/FX45
DTC P0102, P0103 MAF SENSORPFP:22680
Component DescriptionABS006M8
The mass air flow sensor](/img/42/57021/w960_57021-1513.png)
DTC P0102, P0103 MAF SENSOR
EC-173
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Revision: 2004 November 2004 FX35/FX45
DTC P0102, P0103 MAF SENSORPFP:22680
Component DescriptionABS006M8
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. The mass air flow sensor controls the temperature of the hot
wire to a certain amount. The heat generated by the hot wire is
reduced as the intake air flows around it. The more air, the greater
the heat loss.
Therefore, electric current is supplied to hot wire is changed to main-
tain the temperature of the hot wire as air flow increases. The ECM
detects the air flow by means of this current change.
CONSULT-II Reference Value in Data Monitor ModeABS006M9
Specification data are reference values.
On Board Diagnosis LogicABS006MA
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
PBIB1604E
MONITOR ITEM CONDITION SPECIFICATION
MAS A/F SE-B1 See EC-131, "
TROUBLE DIAGNOSIS - SPECIFICATION VALUE" .
CAL/LD VALUE
Engine: After warming up
Shift lever: P or N
Air conditioner switch: OFF
No-loadIdle 5% - 35%
2,500 rpm 5% - 35%
MASS AIRFLOW
Engine: After warming up
Shift lever: P or N
Air conditioner switch: OFF
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 1515 of 4449
![INFINITI FX35 2004 Service Manual EC-174
[VQ35DE]
DTC P0102, P0103 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC Confirmation ProcedureABS006MB
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ign INFINITI FX35 2004 Service Manual EC-174
[VQ35DE]
DTC P0102, P0103 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC Confirmation ProcedureABS006MB
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ign](/img/42/57021/w960_57021-1514.png)
EC-174
[VQ35DE]
DTC P0102, P0103 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC Confirmation ProcedureABS006MB
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
PROCEDURE FOR DTC P0102
With CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and wait at least 5 seconds.
4. If DTC is detected, go to EC-176, "
Diagnostic Procedure" .
With GST
Follow the procedure “With CONSULT-II” above.
PROCEDURE FOR DTC P0103
With CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 5 seconds.
4. If DTC is detected, go to EC-176, "
Diagnostic Procedure" .
If DTC is not detected, go to next step.
5. Start engine and wait at least 5 seconds.
6. If DTC is detected, go to EC-176, "
Diagnostic Procedure" .
With GST
Follow the procedure “With CONSULT-II” above.
SEF058Y
SEF058Y
Page 1516 of 4449
![INFINITI FX35 2004 Service Manual DTC P0102, P0103 MAF SENSOR
EC-175
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Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006MC
TBWM0287E INFINITI FX35 2004 Service Manual DTC P0102, P0103 MAF SENSOR
EC-175
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Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006MC
TBWM0287E](/img/42/57021/w960_57021-1515.png)
DTC P0102, P0103 MAF SENSOR
EC-175
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Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006MC
TBWM0287E
Page 1517 of 4449
![INFINITI FX35 2004 Service Manual EC-176
[VQ35DE]
DTC P0102, P0103 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM gr INFINITI FX35 2004 Service Manual EC-176
[VQ35DE]
DTC P0102, P0103 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM gr](/img/42/57021/w960_57021-1516.png)
EC-176
[VQ35DE]
DTC P0102, P0103 MAF SENSOR
Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
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.
Diagnostic ProcedureABS00CGQ
1. INSPECTION START
Which malfunction (P0102 or P0103) is duplicated?
P0102 or P0103
P0102 >> GO TO 2.
P0103 >> GO TO 3.
2. CHECK INTAKE SYSTEM
Check the following for connection.
Air duct
Va c u u m h o s e s
Intake air passage between air duct and intake manifold
OK or NG
OK >> GO TO 3.
NG >> Reconnect the parts.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
51 L/W Mass air flow sensor[Engine is running]
Warm-up condition
Idle speed0.9 - 1.2V
[Engine is running]
Warm-up condition
Engine speed is 2,500 rpm1.6 - 1.9V
67 B/WSensor ground
(Mass air flow sensor)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
111 W / BECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]
For a few seconds after turning ignition
switch OFF0 - 1.5V
[Ignition switch: OFF]
More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
11 9
120R
RPower supply for ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
Page 1520 of 4449
![INFINITI FX35 2004 Service Manual DTC P0102, P0103 MAF SENSOR
EC-179
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Revision: 2004 November 2004 FX35/FX45
Component InspectionABS006ME
MASS AIR FLOW SENSOR
1. Reconnect all harness connectors disco INFINITI FX35 2004 Service Manual DTC P0102, P0103 MAF SENSOR
EC-179
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Revision: 2004 November 2004 FX35/FX45
Component InspectionABS006ME
MASS AIR FLOW SENSOR
1. Reconnect all harness connectors disco](/img/42/57021/w960_57021-1519.png)
DTC P0102, P0103 MAF SENSOR
EC-179
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Revision: 2004 November 2004 FX35/FX45
Component InspectionABS006ME
MASS AIR FLOW SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Check voltage between ECM terminal 51 (Mass air flow sensor
signal) and ground.
*: Check for linear voltage rise in response to engine being increased to about
4,000 rpm.
4. If the voltage is out of specification, proceed the following.
Turn ignition switch OFF.
Disconnect mass air flow sensor harness connector and reconnect it again.
Perform steps 2 and 3 again.
5. If NG, remove mass air flow sensor from air duct. Check hot wire for damage or dust.
6. If NG, clean or replace mass air flow sensor.
Removal and InstallationABS006MF
MASS AIR FLOW SENSOR
Refer to EM-17, "AIR CLEANER AND AIR DUCT" .
Condition Voltage V
Ignition switch ON (Engine stopped.) Approx. 0.4
Idle (Engine is warmed-up to normal
operating temperature.)0.9 - 1.2
2,500 rpm (Engine is warmed-up to
normal operating temperature.)1.6 - 1.9
Idle to about 4,000 rpm* 0.9 - 1.2 to Approx. 2.4
PBIB1106E
Page 1521 of 4449
![INFINITI FX35 2004 Service Manual EC-180
[VQ35DE]
DTC P0112, P0113 IAT SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC P0112, P0113 IAT SENSORPFP:22630
Component DescriptionABS006MG
The intake air temperature sensor is built-into ma INFINITI FX35 2004 Service Manual EC-180
[VQ35DE]
DTC P0112, P0113 IAT SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC P0112, P0113 IAT SENSORPFP:22630
Component DescriptionABS006MG
The intake air temperature sensor is built-into ma](/img/42/57021/w960_57021-1520.png)
EC-180
[VQ35DE]
DTC P0112, P0113 IAT SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC P0112, P0113 IAT SENSORPFP:22630
Component DescriptionABS006MG
The intake air temperature sensor is built-into mass air flow sensor.
The sensor detects intake air temperature and transmits a signal to
the ECM.
The temperature sensing unit uses a thermistor which is sensitive to
the change in temperature. Electrical resistance of the thermistor
decreases in response to the temperature rise.
*: This data is reference value and is measured between ECM terminal 34 (Intake air
temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output
voltage. Doing so may result in damage to the ECM's transistor.
Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis LogicABS006MH
DTC Confirmation ProcedureABS006MI
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 5 seconds.
4. If 1st trip DTC is detected, go to EC-183, "
Diagnostic Procedure"
.
PBIB1604E
Intake air temperature
°C (°F)Voltage* V Resistance kΩ
25 (77) 3.32 1.94 - 2.06
80 (176) 1.23 0.295 - 0.349
SEF012P
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P0112
0112Intake air tempera-
ture 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 temperature sensor
P0113
0113Intake air tempera-
ture sensor circuit
high inputAn excessively high voltage from the sensor is
sent to ECM.
SEF058Y