service INFINITI FX35 2008 Service Manual

REFRIGERANT PRESSURE SENSOREC-585
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OK >> GO TO 9.
NG >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors E18, F48
 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-139
.
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationINFOID:0000000001326463
REFRIGERANT PRESSURE SENSOR
Refer to ATC-137, "Removal and Installation of Refrigerant Pressure Sensor".
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EC-586
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SNOW MODE SWITCH
SNOW MODE SWITCH
DescriptionINFOID:0000000001326464
The snow mode switch signal is sent to the “unifi
ed meter and A/C amp.” from the snow mode switch. The
“unified meter and A/C amp.” then sends the signal to the ECM by CAN communication line.
The snow mode is used for driving or starting the vehicle on snowy roads or slippery areas. If the snow mode
is activated, the vehicle speed will not be accelerated i mmediately than your original pedal in due to avoid the
vehicle slip. In other words, ECM controls the rapi d engine torque change by controlling the electric throttle
control actuator operating speed.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001326465
MONITOR ITEM CONDITION SPECIFICATION
SNOW MODE SW  Ignition switch: ON Snow mode switch: ON ON
Snow mode switch: OFF OFF
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SNOW MODE SWITCHEC-587
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Wiring DiagramINFOID:0000000001326466
Diagnosis ProcedureINFOID:0000000001326467
1.CHECK SNOW MODE SWIT
ICH OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Select “SNOW MODE SW” in “DAT A MONITOR” mode with CONSULT-III.
3. Check “SNOW MODE SW” indication under the following conditions.
TBWM1415E
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EC-588
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SNOW MODE SWITCH
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2.CHECK SNOW MODE SWIT
ICH OVERALL FUNCTION-II
1. Turn ignition switch ON.
2. Start engine.
3. Check the snow mode indicator in the snow mode switch under the following condition.
OK or NG
OK >> INSPECTION END
NG >> GO TO 7.
3.CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to DI-27, "
CONSULT-III Function (METER/M&A)".
OK or NG
OK >> GO TO 4.
NG >> Go to DI-26
.
4.CHECK SNOW MODE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect snow mode switch harness connector.
3. Turn ignition switch ON.
4. Check voltage between snow mode switch terminal 1 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
 Fuse block (J/B) M1
 10A fuse
 Harness for open or short between snow mode switch and fuse.
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK SNOW MODE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect “unified meter and A/C amp.” harness connector.
3. Check harness continuity between snow mode switch terminal 4 and “unified meter and A/C amp.” termi-
nal 12. Refer to Wiring Diagram.
CONDITION INDICATION
Snow mode switch: ON ON
Snow mode switch: OFF OFF
CONDITION INDICATOR
Snow mode switch: ON Illuminated
Snow mode switch: OFF Not illuminated
Voltage: Battery voltage.
PBIB2562E
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SNOW MODE SWITCHEC-589
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4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-723, "
Ground Inspection".
OK or NG
OK >> GO TO 8.
NG >> Repair or replace ground connections.
8.CHECK SNOW MODE INDICATOR LAMP GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between snow mode switch terminal 2 and ground. Refer to Wiring Diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 9.
NG >> Repair open circuit or short to power in harness or connectors.
9.CHECK SNOW MODE SWITCH
Refer to EC-1185, "
Component Inspection".
OK or NG
OK >> GO TO 10.
NG >> Replace snow mode switch.
10.CHECK INTERMITTENT INCIDENT
Refer to EC-717
.
>> INSPECTION END
Component InspectionINFOID:0000000001326468
SNOW MODE SWITCH
Continuity should exist.
PBIB2625E
Continuity should exist.
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EC-590
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SNOW MODE SWITCH
1. Check continuity between snow mode switch terminals 1 and 4
under the following conditions.
If NG, replace snow mode switch.
If OK, go to following step.
2. Check continuity between snow mode switch terminals 2 and 4 under the following conditions.
If NG, replace snow mode switch.
CONDITION CONTINUITY
Snow mode switch: ON Should exist.
Snow mode switch: OFF Should not exist.
PBIB2563E
CONDITION CONTINUITY 1 Should exist.
2 Should not exist.
PBIB2564E
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MIL AND DATA LINK CONNECTOREC-591
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MIL AND DATA LINK CONNECTOR
Wiring DiagramINFOID:0000000001326469
TBWM1413E
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EC-592
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MIL AND DATA LINK CONNECTOR
TBWM1414E
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SERVICE DATA AND SPECIFICATIONS (SDS)
EC-593
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SERVICE DATA AND SPECIFICATIONS (SDS)
Fuel PressureINFOID:0000000001326470
Idle Speed and Ignition TimingINFOID:0000000001326471
*1: 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:0000000001326472
Mass Air Flow SensorINFOID:0000000001326473
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature SensorINFOID:0000000001326474
Engine Coolant Temperature SensorINFOID:0000000001326475
Air Fuel Ratio (A/F) Sensor 1 HeaterINFOID:0000000001326476
Heated Oxygen sensor 2 HeaterINFOID:0000000001326477
Fuel pressure at idling kPa (kg/cm2, psi)
Approximately 350 (3.57, 51)
Target idle speed
No load*1 (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 15 ° ± 5 ° BTDC
Calculated load value% (Using CONSULT-III or GST)
At idle 5 - 35
At 2,500 rpm 5 - 35
Supply voltageBattery voltage (11 - 14V)
Output voltage at idle 1.0 - 1.2V*
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
Resistance [at 25°C (77 °F)] 2.3 - 4.3 Ω
Resistance [at 25°C (77 °F)] 3.4 - 4.4 Ω
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EC-594
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SERVICE DATA AND SPECIFICATIONS (SDS)
Crankshaft Position Sensor (POS)
INFOID:0000000001326478
Refer to EC-323, "Component Inspection".
Camshaft Position Sensor (PHASE)INFOID:0000000001326479
Refer to EC-330, "Component Inspection".
Throttle Control MotorINFOID:0000000001326480
Fuel InjectorINFOID:0000000001326481
Fuel PumpINFOID:0000000001326482
Resistance [at 25 °C (77 °F)] Approximately 1 - 15 Ω
Resistance [at 10 - 60°C (50 - 140 °F)] 11.1 - 14.5 Ω
Resistance [at 25°C (77 °F)] 0.2 - 5.0 Ω
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