sensor INFINITI FX35 2008 Service Manual

FUEL PUMPEC-1159
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 Harness for open or short between IPDM E/R
and “fuel level sensor unit and fuel pump”
>> Repair harness or connectors.
9.CHECK FUEL PUMP GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between “fuel level sensor unit and fuel pump” terminal 3 and ground.
Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to power in harness or connectors.
10.CHECK FUEL PUMP
Refer to EC-1159, "
Component Inspection".
OK or NG
OK >> GO TO 11.
NG >> Replace fuel pump.
11 .CHECK INTERMITTENT INCIDENT
Refer to EC-717
.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-17.
NG >> Repair or replace harness or connectors.
Component InspectionINFOID:0000000001327061
FUEL PUMP
1. Disconnect “fuel level sensor unit and fuel pump” harness connector.
2. Check resistance between “fuel level sensor unit and fuel pump”
terminals 1 and 3.
Removal and InstallationINFOID:0000000001327062
FUEL PUMP
Refer to FL-4.
Continuity should exist.
Resistance: 0.2 - 5.0
Ω [at 25 °C (77 °F)]
SEC918C
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REFRIGERANT PRESSURE SENSOREC-1177
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REFRIGERANT PRESSURE SENSOR
Component DescriptionINFOID:0000000001327073
The refrigerant pressure sensor is installed at the condenser of the
air conditioner system. The sensor
uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan system.
PBIB1492E
PBIB2657E
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EC-1178
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REFRIGERANT PRESSURE SENSOR
Wiring Diagram
INFOID:0000000001327074
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
TBWM0265E
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REFRIGERANT PRESSURE SENSOREC-1179
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Diagnosis ProcedureINFOID:0000000001327075
1.CHECK REFRIGERANT PRESSURE
SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check voltage between ECM terminal 70 and ground with CON- SULT-III or tester.
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
2.CHECK GROUND CONNECTIONS
1. Turn A/C switch and blower fan switch OFF.
2. Turn ignition switch OFF.
3. Loosen and retighten three ground screws on the body. Refer to EC-723, "
Ground Inspection".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.
3.CHECK REFRIGERANT PRESSURE SE NSOR POWER SUPPLY CIRCUIT
TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
49 PU Sensor power supply
(Refrigerant pressure sen-
sor)
[Ignition switch: ON]
Approximately 5V
67 B/W Sensor ground [Engine is running]

Warm-up condition
 Idle speed Approximately 0V
70 L/R Refrigerant pressure sensor [Engine is running]

Warm-up condition
 Both A/C switch and blower fan motor switch: ON (Compressor operates) 1.0 - 4.0V
Voltage: 1.0 - 4.0V
PBIB1188E
PBIB2195E
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EC-1180
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REFRIGERANT PRESSURE SENSOR
1. Disconnect refrigerant pressu
re sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors E17, F47
 Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 3 and ECM terminal 67. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors E17, F47
 Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK REFRIGERANT PRESSURE SENSOR INPU T SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
PBIB1492E
Voltage: Approximately 5V
PBIB0188E
Continuity should exist.
Continuity should exist.
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REFRIGERANT PRESSURE SENSOREC-1181
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OK >> GO TO 9.
NG >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors E17, F47
 Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.CHECK INTERMITTENT INCIDENT
Refer to EC-717
.
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationINFOID:0000000001327076
REFRIGERANT PRESSURE SENSOR
Refer to ATC-137, "Removal and Installation of Refrigerant Pressure Sensor".
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VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
EC-1187
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VARIABLE INDUCTION AI
R CONTROL SYSTEM (VIAS)
DescriptionINFOID:0000000001327082
SYSTEM DESCRIPTION
*: The ECM determines the start signal status by the signals of engine speed and battery voltage.
When the engine is running at low or medium speed, the power valve isfully closed. Under this condition, the
effective suction port length is equivalentto the total lengt h of the intake manifold collector's suction port includ-
ingthe intake valve. This long suction port provides incr eased air intake whichresults in improved suction effi-
ciency and higher torque generation.
The surge tank and one-way valve are provided. When engine is runningat high speed, the ECM sends the
signal to the VIAS control solenoid valve.This signal introduces the intake manifold vacuum into the power
valve actuatorand therefore opens the power valve to two suction passages together in thecollector.
Under this condition, the effective port length is equi valent to thelength of the suction port provided indepen-
dently for each cylinder. Thisshortened port length results in enhanced engine output with reduced suctionre-
sistance under high speeds.
The power valve is always open regardless of the engine speed when gear position is in N or P.
COMPONENT DESCRIPTION
Power Valve
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
VIAS control VIAS control solenoid valve
Mass air flow sensor Amount of intake air
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Battery Battery voltage*
Engine coolant temperature sensor Engine coolant temperature
PBIB1876E
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EC-1196
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Fuel PressureINFOID:0000000001327089
Idle Speed and Ignition TimingINFOID:0000000001327090
*: Under the following conditions:
 Air conditioner switch: OFF
 Electric load: OFF (Lights, heater fan & rear window defogger)
 Steering wheel: Kept in straight-ahead position
Calculated Load ValueINFOID:0000000001327091
Mass Air Flow SensorINFOID:0000000001327092
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature SensorINFOID:0000000001327093
Engine Coolant Te
mperature SensorINFOID:0000000001327094
Fuel Tank Temperature SensorINFOID:0000000001327095
Fuel pressure at idling kPa (kg/cm2, psi) Approximately 350 (3.57, 51)
Target idle speed No load* (in P or N position) 650
±50 rpm
Air conditioner: ON In P or N position 700 rpm or more
Ignition timing In P or N position 12 ° ± 5 ° BTDC
Condition Calculated load value% (Using CONSULT-III or GST)
At idle 14.0 - 33.0
At 2,500 rpm 12.0 - 25.0
Supply voltageBattery voltage (11 - 14V)
Output voltage at idle 1.0 - 1.3V*
Mass air flow (Using CONSULT-III or GST) 2.0 - 6.0 g·m/sec at idle*
7.0 - 20.0 g·m/sec at 2,500 rpm*
Temperature °C ( °F) Resistance k Ω
25 (77) 1.800 - 2.200
Temperature °C ( °F) Resistance k Ω
20 (68) 2.1 - 2.9
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
Temperature °C ( °F) Resistance k Ω
20 (68) 2.3 - 2.7
50 (122) 0.79 - 0.90
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SERVICE DATA AND SPECIFICATIONS (SDS)
EC-1197
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Crankshaft Position Sensor (POS)INFOID:0000000001327096
Refer to
EC-910, "Component Inspection".
Camshaft Position Sensor (PHASE)INFOID:0000000001327097
Refer to EC-915, "Component Inspection".
A/F Sensor 1 HeaterINFOID:0000000001327098
Heated Oxygen sensor 2 HeaterINFOID:0000000001327099
Throttle Control MotorINFOID:0000000001327100
Fuel InjectorINFOID:0000000001327101
Fuel PumpINFOID:0000000001327102
Resistance [at 25 °C (77 °F)] 2.3 - 4.3 Ω
Resistance [at 25°C (77 °F)] 5.0 - 7.0 Ω
Resistance [at 25°C (77 °F)] Approximately 1 - 15 Ω
Resistance [at 10 - 60°C (50 - 140 °F)] 13.5 - 17.5 Ω
Resistance [at 25°C (77 °F)] 0.2 - 5.0 Ω
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FRONT BUMPEREI-15
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Removal and InstallationINFOID:0000000001529395
CAUTION:
Bumper fascia is made of resin. Do not apply strong force to it, and be careful to prevent contact with
oil.
REMOVAL
1. Remove front grille. Refer to EI-22, "Removal and Installation".
2. Remove front fillet molding assembly. Only the place connected with a front bumper fascia is removed.
3. Remove bolts and clips of front undercover.
4. Remove screws and clips of right/left fender protectors on front side. Refer to EI-24, "
Removal and Installation".
5. Remove bolts of right/left fender.
6. Insert driver rolled with cloth between bumper fascia and “S” type clips, and remove bumper fascia.
7. Disconnect harness connector of fog lamps.
8. Remove bumper fascia assembly. CAUTION:
When removing bumper fascia, 2 workers are required so as to prevent it from dropping.
9. Remove bumper energy absorber.
10. Remove bolts and nuts of bumper reinforcement, and remove bumper reinforcement. Remove bolts and nuts with power tool.
11. Remove ICC sensor with bracket. Refer to Refer to ACS-65
.
PIIA4350E
PIIA4338E
PIIA4331E
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