2008 INFINITI FX35 installation

DTC P0122, P0123 TP SENSOREC-203
< SERVICE INFORMATION > [VQ35DE]
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5. Check voltage between ECM terminals 50 (TP sensor 1signal),
69 (TP sensor 2signal) and body ground under the following
conditions.
6. If NG, replace electric throttle control actuator and go to the next
step.
7. Perform EC-85, "
Throttle Valve Closed Position Learning".
8. Perform EC-85, "
Idle Air Volume Learning".
Removal and InstallationINFOID:0000000001326027
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-19.
Terminal Accelerator pedal Voltage
50
(Throttle position sensor 1) Fully released More than 0.36V
Fully depressed Less than 4.75V
69
(Throttle position sensor 2) Fully released Less than 4.75V
Fully depressed More than 0.36V
PBIB1608E
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EC-206
< SERVICE INFORMATION >[VQ35DE]
DTC P0125 ECT SENSOR
Check resistance between engine coolant temperature sensor termi-
nals 1 and 2 as shown in the figure.

If NG, replace engine coolant temperature sensor.
Removal and InstallationINFOID:0000000001326033
ENGINE COOLANT TEMPERATURE SENSOR
Refer to
CO-27.
PBIB2005E
Engine coolant temperature °C ( °F) Resistance k Ω
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
SEF012P
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DTC P0127 IAT SENSOREC-209
< SERVICE INFORMATION > [VQ35DE]
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Removal and InstallationINFOID:0000000001326039
MASS AIR FLOW SENSOR
Refer to
EM-17.
SEF012P
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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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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DTC P0128 THERMOSTAT FUNCTIONEC-211
< SERVICE INFORMATION > [VQ35DE]
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Component InspectionINFOID:0000000001326043
ENGINE COOLANT TEMPERATURE SENSOR
Check resistance between engine cool
ant temperature sensor termi-
nals 1 and 2 as shown in the figure.

If NG, replace engine coolant temperature sensor.
Removal and InstallationINFOID:0000000001326044
ENGINE COOLANT TEMPERATURE SENSOR
Refer to CO-27.
PBIB2005E
Engine coolant temperature °C ( °F) Resistance k Ω
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
SEF012P
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DTC P0130, P0150 A/F SENSOR 1
EC-219
< SERVICE INFORMATION > [VQ35DE]
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NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK INTERMITTENT INCIDENT
Perform EC-139
.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace.
6.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air f uel ratio (A/F) sensor 1.
CAUTION:
 Discard any air fuel ratio (A/F) sensor which has b een dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one.
 Before installing new air fuel ra tio (A/F) sensor, clean exhaust syst em threads using Heated Oxygen
Sensor Thread Cleaner tool J-43897-18 or J- 43897-12 and approved anti-seize lubricant.
>> INSPECTION END
Removal and InstallationINFOID:0000000001326052
AIR FUEL RATIO (A/F) SENSOR 1
Refer to EM-26.
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DTC P0131, P0151 A/F SENSOR 1
EC-227
< SERVICE INFORMATION > [VQ35DE]
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NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK INTERMITTENT INCIDENT
Perform EC-139
.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace.
6.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air f uel ratio (A/F) sensor 1.
CAUTION:
 Discard any air fuel ratio (A/F) sensor which has b een dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one.
 Before installing new air fuel ra tio (A/F) sensor, clean exhaust syst em threads using Heated Oxygen
Sensor Thread Cleaner tool J-43897-18 or J- 43897-12 and approved anti-seize lubricant.
>> INSPECTION END
Removal and InstallationINFOID:0000000001326059
AIR FUEL RATIO (A/F) SENSOR 1
Refer to EM-26.
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DTC P0132, P0152 A/F SENSOR 1
EC-235
< SERVICE INFORMATION > [VQ35DE]
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NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK INTERMITTENT INCIDENT
Perform EC-139
.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace.
6.REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air f uel ratio (A/F) sensor 1.
CAUTION:
 Discard any air fuel ratio (A/F) sensor which has b een dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one.
 Before installing new air fuel ra tio (A/F) sensor, clean exhaust syst em threads using Heated Oxygen
Sensor Thread Cleaner tool J-43897-18 or J- 43897-12 and approved anti-seize lubricant.
>> INSPECTION END
Removal and InstallationINFOID:0000000001326066
AIR FUEL RATIO (A/F) SENSOR 1
Refer to EM-26.
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