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![INFINITI FX35 2005 Service Manual EC-672
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FUEL PUMP CIRCUIT
Revision: 2005 July 2005 FX
7. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
1. Disconnect IPDM E/R harness connector E8.
2. Check harness continuity between IPDM E/R ter INFINITI FX35 2005 Service Manual EC-672
[VQ35DE]
FUEL PUMP CIRCUIT
Revision: 2005 July 2005 FX
7. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
1. Disconnect IPDM E/R harness connector E8.
2. Check harness continuity between IPDM E/R ter](/manual-img/42/57020/w960_57020-2064.png)
EC-672
[VQ35DE]
FUEL PUMP CIRCUIT
Revision: 2005 July 2005 FX
7. CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV
1. Disconnect IPDM E/R harness connector E8.
2. Check harness continuity between IPDM E/R terminal 39 and “fuel level sensor unit and fuel pump” termi- nal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 11.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E206, B6
Harness for open or short between IPDM E/R and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to ground or short to power in 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-1363, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> Replace fuel pump.
11 . CHECK INTERMITTENT INCIDENT
Refer to EC-854, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace IPDM E/R.
NG >> Repair or replace harness or connectors.
Component InspectionABS006YJ
FUEL PUMP
1. Disconnect “fuel level sensor unit and fuel pump” harness connector. Continuity should exist.
Continuity should exist.
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FUEL PUMP CIRCUIT EC-673
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2. Check resistance between “fuel level sensor unit and fuel pump”
terminals 1 and 3.
Removal and InstallationABS006YK
FUEL PUMP
Refer to FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY" .
Resistance: Approximately 0.2 - 5.0
Ω [at 25 °C
(77 °F)]
SEC918C
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EC-674
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2005 July 2005 FX
REFRIGERANT PRESSURE SENSORPFP:92136
Component DescriptionABS006YL
The refrigerant pressure sensor is installed at the liquid tank 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.
PBIB2007E
SEF099XA
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REFRIGERANT PRESSURE SENSOR EC-675
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Wiring DiagramABS006YM
TBWM0312E
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![INFINITI FX35 2005 Service Manual EC-676
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2005 July 2005 FX
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground term INFINITI FX35 2005 Service Manual EC-676
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2005 July 2005 FX
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground term](/manual-img/42/57020/w960_57020-2068.png)
EC-676
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2005 July 2005 FX
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 ProcedureABS006YN
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 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 switch OFF.
2. Stop engine.
3. Turn ignition switch OFF.
4. Loosen and retighten ground three screws on the body. Refer to EC-170, "
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 switch are ON
(Compressor operates) 1.0 - 4.0V
Voltage: 1.0 - 4.0V
PBIB1188E
PBIB2625E
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![INFINITI FX35 2005 Service Manual REFRIGERANT PRESSURE SENSOR EC-677
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Revision: 2005 July 2005 FX
3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pre INFINITI FX35 2005 Service Manual REFRIGERANT PRESSURE SENSOR EC-677
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3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pre](/manual-img/42/57020/w960_57020-2069.png)
REFRIGERANT PRESSURE SENSOR EC-677
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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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EC-678
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2005 July 2005 FX
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-163, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationABS006YO
REFRIGERANT PRESSURE SENSOR
Refer to ATC-156, "Removal and Installation of Refrigerant Pressure Sensor" .
Continuity should exist.
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![INFINITI FX35 2005 Service Manual ELECTRICAL LOAD SIGNAL EC-679
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Revision: 2005 July 2005 FX
ELECTRICAL LOAD SIGNALPFP:25350
DescriptionABS006YP
The electrical load signal (Headlamp swit INFINITI FX35 2005 Service Manual ELECTRICAL LOAD SIGNAL EC-679
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ELECTRICAL LOAD SIGNALPFP:25350
DescriptionABS006YP
The electrical load signal (Headlamp swit](/manual-img/42/57020/w960_57020-2071.png)
ELECTRICAL LOAD SIGNAL EC-679
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Revision: 2005 July 2005 FX
ELECTRICAL LOAD SIGNALPFP:25350
DescriptionABS006YP
The electrical load signal (Headlamp switch signal, etc.) is transferred through the CAN communication line
from BCM to ECM via IPDM E/R.
CONSULT-II Reference Value in Data Monitor ModeABS006YQ
Specification data are reference values.
Diagnostic ProcedureABS006YR
1. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Connect CONSULT-II and select “DATA MONITOR” mode.
3. Select “LOAD SIGNAL” and check indication under the following conditions.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Check “LOAD SIGNAL” indication under the following conditions.
OK or NG
OK >> INSPECTION END
NG >> GO TO 4.
3. CHECK REAR WINDOW DEFOGGER SYSTEM
Refer to GW-86, "
REAR WINDOW DEFOGGER" .
>> INSPECTION END
4. CHECK HEADLAMP SYSTEM
Refer to LT- 7 , "
HEADLAMP - XENON TYPE -" .
>> INSPECTION END
MONITOR ITEM CONDITION SPECIFICATION
LOAD SIGNAL
Ignition switch: ON Rear window defogger switch is ON
and/or lighting switch is in 2nd. ON
Rear window defogger switch is OFF
and lighting switch is OFF. OFF
Condition Indication
Rear window defogger switch: ON ON
Rear window defogger switch: OFF OFF
PBIB0103E
Condition Indication
Lighting switch: ON at 2nd position ON Lighting switch: OFF OFF
PBIB0103E