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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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![INFINITI FX35 2008 Service Manual
REFRIGERANT PRESSURE SENSOREC-1179
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Diagnosis ProcedureINFOID:0000000001327075
1.CHECK REFRIGERANT PRESSURE
SENSOR OVERALL FUNCTION
1. INFINITI FX35 2008 Service Manual
REFRIGERANT PRESSURE SENSOREC-1179
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Diagnosis ProcedureINFOID:0000000001327075
1.CHECK REFRIGERANT PRESSURE
SENSOR OVERALL FUNCTION
1.](/manual-img/42/57017/w960_57017-2418.png)
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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![INFINITI FX35 2008 Service Manual
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 pres INFINITI FX35 2008 Service Manual
EC-1180
< SERVICE INFORMATION >[VK45DE]
REFRIGERANT PRESSURE SENSOR
1. Disconnect refrigerant pressu
re sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between refrigerant pres](/manual-img/42/57017/w960_57017-2419.png)
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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![INFINITI FX35 2008 Service Manual
EC-1182
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SNOW MODE SWITCH
SNOW MODE SWITCH
DescriptionINFOID:0000000001327077
The snow mode switch signal is sent to the “unifi
ed meter and A/C amp.” from the snow INFINITI FX35 2008 Service Manual
EC-1182
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SNOW MODE SWITCH
SNOW MODE SWITCH
DescriptionINFOID:0000000001327077
The snow mode switch signal is sent to the “unifi
ed meter and A/C amp.” from the snow](/manual-img/42/57017/w960_57017-2421.png)
EC-1182
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SNOW MODE SWITCH
SNOW MODE SWITCH
DescriptionINFOID:0000000001327077
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:0000000001327078
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-1183
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Wiring DiagramINFOID:0000000001327079
Diagnosis ProcedureINFOID:0000000001327080
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.
TBWM1369E
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![INFINITI FX35 2008 Service Manual
EC-1184
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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 th INFINITI FX35 2008 Service Manual
EC-1184
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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 th](/manual-img/42/57017/w960_57017-2423.png)
EC-1184
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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 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-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.
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 LAMP
Snow mode switch: ON Illuminated
Snow mode switch: OFF Not illuminated
Voltage: Battery voltage.
PBIB2562E
Continuity should exist.
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