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REFRIGERANT PRESSURE SENSOR EC-1345
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REFRIGERANT PRESSURE SENSORPFP:92136
Component DescriptionNBS004HA
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-1346
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REFRIGERANT PRESSURE SENSOR
Revision: 2006 July 2007 FX35/FX45
Wiring DiagramNBS004HB
TBWM0265E
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![INFINITI FX35 2007 Service Manual REFRIGERANT PRESSURE SENSOR EC-1347
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Specification data are reference values and are measured between each terminal a INFINITI FX35 2007 Service Manual REFRIGERANT PRESSURE SENSOR EC-1347
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Specification data are reference values and are measured between each terminal a](/manual-img/42/57018/w960_57018-2722.png)
REFRIGERANT PRESSURE SENSOR EC-1347
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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 ProcedureNBS004HC
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-II 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-819, "
Ground Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.
TER-
MINAL 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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![INFINITI FX35 2007 Service Manual EC-1348
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REFRIGERANT PRESSURE SENSOR
Revision: 2006 July 2007 FX35/FX45
3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector. INFINITI FX35 2007 Service Manual EC-1348
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REFRIGERANT PRESSURE SENSOR
Revision: 2006 July 2007 FX35/FX45
3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector.](/manual-img/42/57018/w960_57018-2723.png)
EC-1348
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REFRIGERANT PRESSURE SENSOR
Revision: 2006 July 2007 FX35/FX45
3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between refrigerant pressure sensor terminal 1 and ground with CONSULT-II 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.
PBIB1492E
Voltage: Approximately 5V
PBIB0188E
Continuity should exist.
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REFRIGERANT PRESSURE SENSOR EC-1349
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7. CHECK REFRIGERANT PRESSURE SENSOR INPUT 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
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-812, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationNBS004HD
REFRIGERANT PRESSURE SENSOR
Refer to ATC-154, "Removal and Installation of Refrigerant Pressure Sensor" .
Continuity should exist.
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EC-1350
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SNOW MODE SWITCH
Revision: 2006 July 2007 FX35/FX45
SNOW MODE SWITCHPFP:25130
DescriptionNBS004HV
The snow mode switch signal is sent to the “unified 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 immediately than your original pedal in due to avoid the
vehicle slip. In other words, ECM controls the rapid engine torque change by controlling the electric throttle
control actuator operating speed.
CONSULT-II Reference Value in the Data Monitor ModeNBS004HW
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 SWITCH EC-1351
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Wiring DiagramNBS004HX
TBWM1369E
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![INFINITI FX35 2007 Service Manual EC-1352
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SNOW MODE SWITCH
Revision: 2006 July 2007 FX35/FX45
Diagnostic ProcedureNBS004HY
1. CHECK SNOW MODE SWITICH OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Select “SNOW MODE SW INFINITI FX35 2007 Service Manual EC-1352
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SNOW MODE SWITCH
Revision: 2006 July 2007 FX35/FX45
Diagnostic ProcedureNBS004HY
1. CHECK SNOW MODE SWITICH OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Select “SNOW MODE SW](/manual-img/42/57018/w960_57018-2727.png)
EC-1352
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SNOW MODE SWITCH
Revision: 2006 July 2007 FX35/FX45
Diagnostic ProcedureNBS004HY
1. CHECK SNOW MODE SWITICH OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Select “SNOW MODE SW” in “DATA MONITOR” mode with CONSULT-II.
3. Check “SNOW MODE SW” indication under the following condi- tions.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK SNOW MODE SWITICH OVERALL FUNCTION-II
1. Turn ignition switch ON.
2. Start engine.
3. Check the snow indicator lamp 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-31, "
SELF-DIAG RESULTS" .
OK or NG
OK >> GO TO 4.
NG >> Go to DI-28, "
UNIFIED METER AND A/C AMP" .
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-II or tester.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
CONDITION INDICATION
Snow mode switch: ON ON
Snow mode switch: OFF OFF
PBIB2009E
CONDITION INDICATOR LAMP
Snow mode switch: ON Illuminated
Snow mode switch: OFF Not illuminated
Voltage: Battery voltage.
PBIB2562E