2008 INFINITI FX35 Service Manual

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Page 1449 of 3924

INFINITI FX35 2008 Service Manual
DTC P0127 IAT SENSOREC-209
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Removal and InstallationINFOID:0000000001326039
MASS AIR FLOW SENSOR
Refer to
EM-17.
SEF012P
3AA93ABC3ACD3

Page 1450 of 3924

INFINITI FX35 2008 Service Manual
EC-210
< SERVICE INFORMATION >[VQ35DE]
DTC P0128 THERMOSTAT FUNCTION
DTC P0128 THERMOSTAT FUNCTION
On Board Diagn
osis LogicINFOID:0000000001326040
Engine coolant temperature has not risen enough to

EC-210
< SERVICE INFORMATION >[VQ35DE]
DTC P0128 THERMOSTAT FUNCTION
DTC P0128 THERMOSTAT FUNCTION
On Board Diagn
osis LogicINFOID:0000000001326040
Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long
enough.
This is due to a leak in the seal or the thermostat stuck open.
DTC Confirmation ProcedureINFOID:0000000001612840
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
For best results, perform at ambient temperature of –10 °C (14 °F) or higher.
For best results, perform at en gine coolant temperature of –10 °C (14 °F) to 71 °C (160 °F).
Before performing the following procedure, do not fill with the fuel.
WITH CONSULT-III
1. Turn A/C switch OFF.
2. Turn blower fan switch OFF.
3. Turn ignition switch ON.
4. Select “COOLAN TEMP/S” in “DATA MONITOR” mode with CONSULT-III.
5. Check the indication of “COOLAN TEMP/S”.
If it is below 71 °C (160 °F), go to following step.
If it is above 71 °C (160 °F), cool down the engine to less than 71 °C (160 °F), then go to next step.
6. Start engine.
7. Wait at idle for a least 30 minutes. If “COOLAN TEMP/S” increases to more than 71 °C (160 °F) within 30 minutes, turn ignition switch
OFF because the test result will be OK.
8. Check 1st trip DTC.
9. If 1st trip DTC is detected, go to EC-210, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III” above.
Diagnosis ProcedureINFOID:0000000001612841
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-211, "
Component Inspection".
OK or NG
OK >> GO TO 2.
NG >> Replace engine coolant temperature sensor.
2.CHECK THERMOSTAT
Refer to CO-27, "
Removal and Installation".
OK or NG
OK >> INSPECTION END
NG >> Replace thermostat.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0128
0128 Thermostat function The engine coolant temperature does not reach
to specified temperature even though the en-
gine has run long enough. Thermostat
Leakage from sealing portion of thermo-
stat
Engine coolant temperature sensor
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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Page 1451 of 3924

INFINITI FX35 2008 Service Manual
DTC P0128 THERMOSTAT FUNCTIONEC-211
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Component InspectionINFOID:0000000001326043
ENGINE COOLANT TEMPERATURE SENSOR
Check resistance bet

Page 1452 of 3924

INFINITI FX35 2008 Service Manual
EC-212
< SERVICE INFORMATION >[VQ35DE]
DTC P0130, P0150
A/F SENSOR 1
DTC P0130, P0150 A/F SENSOR 1
Component DescriptionINFOID:0000000001326045
The air fuel ratio (A/F) sensor is a planar dual-cell

EC-212
< SERVICE INFORMATION >[VQ35DE]
DTC P0130, P0150
A/F SENSOR 1
DTC P0130, P0150 A/F SENSOR 1
Component DescriptionINFOID:0000000001326045
The air fuel ratio (A/F) sensor is a planar dual-cell limit current sen-
sor. The sensor element of the air fuel ratio (A/F) sensor is the com-
bination of a Nernst concentrati on cell (sensor cell) with an oxygen-
pump cell, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range (0.7 <
< air).
The exhaust gas components diffuse through the diffusion gap at the
electrode of the oxygen pump and Nernst concentration cell, where
they are brought to thermodynamic balance.
An electronic circuit controls the pump current through the oxygen-
pump cell so that the composition of the exhaust gas in the diffusion
gap remains constant at = 1. Therefore, the air fuel ratio (A/F) sen-
sor is able to indicate air/fuel ratio by this pumping of current. In
addition, a heater is integrated in the sensor to ensure the required
operating temperature of 700 - 800 °C (1,292 - 1,472 °F).
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001326046
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000001326047
To judge the malfunction, the diagnosis checks that the A/ F signal computed by ECM from the air fuel ratio (A/
F) sensor 1 signal fluctuates ac cording to fuel feedback control.
DTC Confirmation ProcedureINFOID:0000000001326048
Perform PROCEDURE FOR MALFUNCTION A first.
If the DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
PROCEDURE FOR MALFUNCTION A
SEF579Z
SEF580Z
MONITOR ITEM CONDITION SPECIFICATION
A/F SEN1 (B1)
A/F SEN1 (B2) Engine: After warming up
Maintaining engine speed at
2,000 rpm Fluctuates around 1.5V
DTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P0130
0130
(Bank 1) Air fuel ratio (A/F) sensor 1
circuit A)
The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly in the range other
than approx. 1.5V.
Harness or connectors
(The A/F sensor 1 circuit is open
or shorted.)
Air fuel ratio (A/F) sensor 1
P0150
0150
(Bank 2) B)
The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly approx. 1.5V.
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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Page 1453 of 3924

INFINITI FX35 2008 Service Manual
DTC P0130, P0150 A/F SENSOR 1
EC-213
< SERVICE INFORMATION > [VQ35DE]
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1. Start engine and warm it up to normal operating temperature.
2. Let engine idle for 2 minutes.

DTC P0130, P0150 A/F SENSOR 1
EC-213
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1. Start engine and warm it up to normal operating temperature.
2. Let engine idle for 2 minutes.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to
EC-217, "
Diagnosis Procedure".
PROCEDURE FOR MALFUNCTION B
CAUTION:
Always drive vehicle at a safe speed.
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Select “A/F SEN1 (B1)” or “A/F SEN1 (B2) ” in “DATA MONITOR” mode with CONSULT-III.
3. Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication. If the indication is constantly approx . 1.5V and does not fluctuates, go to EC-217, "
Diagnosis Procedure".
If the indication fluctuates around 1.5V, go to next step.
4. Select “A/F SEN1 (B1) P1276” (for DTC P0130) or “A/F SEN1 (B2) P1286” (for DTC P0150) of “A/F
SEN1” in “DTC WORK SUPPORT” mode with CONSULT-III.
5. Touch “START”.
6. When the following conditions are met, “TESTIN G” will be displayed on the CONSULT-III screen.
If “TESTING” is not displayed after 20 seconds, retry from step 2.
7. Release accelerator pedal fully. NOTE:
Never apply brake during releasing the accelerator pedal.
8. Make sure that “TESTING” changes to “COMPLETED”. If “TESTING” changed to “OUT OF CONDITION”, retry from step 6.
9. Make sure that “OK” is display ed after touching “SELF-DIAG RESULT”.
If “NG” is displayed, go to EC-217, "
Diagnosis Procedure".
Overall Function CheckINFOID:0000000001326049
PROCEDURE FOR MALFUNCTION B
Use this procedure to check the overall function of the A/F sensor 1 circuit. During this check, a 1st trip DTC
might not be confirmed.
With GST
1. Start engine and warm it up to normal operating temperature.
2. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in the suitable gear position.
3. Set D position, then release the accelerator pedal fu lly until the vehicle speed decreases to 50 km/h (30
MPH).
NOTE:
Never apply brake during releasing the accelerator pedal.
4. Repeat steps 2 to 3 for five times.
5. Stop the vehicle and turn ignition switch OFF.
6. Wait at least 10 seconds and restart engine.
7. Repeat steps 2 to 3 for five times.
8. Stop the vehicle and connect GST to the vehicle.
9. Make sure that no 1st trip DTC is displayed. If 1st trip DTC is displayed, go to EC-217, "
Diagnosis Procedure".
ENG SPEED 1,100 - 3,200 rpm
VHCL SPEED SE More than 64 km/h (40 MPH)
B/FUEL SCHDL 1.0 - 8.0 msec
Shift lever D position
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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Page 1454 of 3924

INFINITI FX35 2008 Service Manual
EC-214
< SERVICE INFORMATION >[VQ35DE]
DTC P0130, P0150
A/F SENSOR 1
Wiring Diagram
INFOID:0000000001326050
BANK 1
Specification data are reference values and are measured between each terminal and

Page 1455 of 3924

INFINITI FX35 2008 Service Manual
DTC P0130, P0150 A/F SENSOR 1
EC-215
< SERVICE INFORMATION > [VQ35DE]
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Do not use ECM ground terminals wh
en measuring input/output voltage. Doing so may result in dam-

Page 1456 of 3924

INFINITI FX35 2008 Service Manual
EC-216
< SERVICE INFORMATION >[VQ35DE]
DTC P0130, P0150
A/F SENSOR 1
BANK 2
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CON

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