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![INFINITI FX35 2007 Service Manual REFRIGERANT PRESSURE SENSOR EC-665
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Revision: 2006 July 2007 FX35/FX45
Specification data are reference values and are measured between each terminal an INFINITI FX35 2007 Service Manual REFRIGERANT PRESSURE SENSOR EC-665
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Specification data are reference values and are measured between each terminal an](/manual-img/42/57018/w960_57018-2040.png)
REFRIGERANT PRESSURE SENSOR EC-665
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Revision: 2006 July 2007 FX35/FX45
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 ProcedureNBS003ZS
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. Stop engine.
3. Turn ignition switch OFF.
4. Loosen and retighten ground screw on the body. Refer to EC-153, "
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 switch: ON
(Compressor operates) 1.0 - 4.0V
Voltage: 1.0 - 4.0V
PBIB1188E
PBIB2625E
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![INFINITI FX35 2007 Service Manual EC-666
[VQ35DE]
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-666
[VQ35DE]
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_57018-2041.png)
EC-666
[VQ35DE]
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 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.
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 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.
PBIB2007E
Voltage: Approximately 5V
PBIB0188E
Continuity should exist.
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REFRIGERANT PRESSURE SENSOR EC-667
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Revision: 2006 July 2007 FX35/FX45
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 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-147, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationNBS003ZT
REFRIGERANT PRESSURE SENSOR
Refer to ATC-154, "Removal and Installation of Refrigerant Pressure Sensor" .
Continuity should exist.
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EC-668
[VQ35DE]
SNOW MODE SWITCH
Revision: 2006 July 2007 FX35/FX45
SNOW MODE SWITCHPFP:25310
DescriptionNBS0040B
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 ModeNBS0040C
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-669
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Revision: 2006 July 2007 FX35/FX45
Wiring DiagramNBS0040D
TBWM1415E
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![INFINITI FX35 2007 Service Manual EC-670
[VQ35DE]
SNOW MODE SWITCH
Revision: 2006 July 2007 FX35/FX45
Diagnostic ProcedureNBS0040E
1. CHECK SNOW MODE SWITICH OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Select “SNOW MODE SW INFINITI FX35 2007 Service Manual EC-670
[VQ35DE]
SNOW MODE SWITCH
Revision: 2006 July 2007 FX35/FX45
Diagnostic ProcedureNBS0040E
1. CHECK SNOW MODE SWITICH OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Select “SNOW MODE SW](/manual-img/42/57018/w960_57018-2045.png)
EC-670
[VQ35DE]
SNOW MODE SWITCH
Revision: 2006 July 2007 FX35/FX45
Diagnostic ProcedureNBS0040E
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 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-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
Snow mode switch: ON Illuminated
Snow mode switch: OFF Not illuminated
Voltage: Battery voltage.
PBIB2562E
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![INFINITI FX35 2007 Service Manual SNOW MODE SWITCH EC-671
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Revision: 2006 July 2007 FX35/FX45
5. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) M1
10A fuse
Harness INFINITI FX35 2007 Service Manual SNOW MODE SWITCH EC-671
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Revision: 2006 July 2007 FX35/FX45
5. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) M1
10A fuse
Harness](/manual-img/42/57018/w960_57018-2046.png)
SNOW MODE SWITCH EC-671
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Revision: 2006 July 2007 FX35/FX45
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.
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-819, "
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. Continuity should exist.
PBIB2625E
Continuity should exist.
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EC-672
[VQ35DE]
SNOW MODE SWITCH
Revision: 2006 July 2007 FX35/FX45
9. CHECK SNOW MODE SWITCH
Refer to EC-1354, "
Component Inspection" .
OK or NG
OK >> GO TO 10.
NG >> Replace snow mode switch.
10. CHECK INTERMITTENT INCIDENT
Refer to EC-812, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Component InspectionNBS0040F
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