Nissan Pathfinder. Manual — part 535
EC-446
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
-
Apply vacuum pressure to hose end [
−13.3 kPa (−0.136 kg/cm
2
,
−1.93 psi)] with fuel gauge retainer
remaining open and check that the pressure is applicable.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace refueling EVAP vapor cut valve with fuel tank. Refer to
FL-13, "Removal and Installation"
.
3.
CHECK REFUELING EVAP VAPOR CUT VALVE
Without CONSULT
1. Turn ignition switch OFF.
2. Remove fuel tank. Refer to
FL-13, "Removal and Installation"
.
3. Drain fuel from the tank as per the following:
-
Remove fuel gauge retainer.
-
Drain fuel from the tank using a handy pump into a fuel container.
4. Check refueling EVAP vapor cut valve for being stuck to close as per the following.
Blow air into the refueling EVAP vapor cut valve (from the end of EVAP/ORVR line hose), and check that
the air flows freely into the tank.
5. Check refueling EVAP vapor cut valve for being stuck to open as per the following.
-
Connect vacuum pump to hose end.
-
Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ring with new one.
-
Turn fuel tank upside down.
-
Apply vacuum pressure to hose end [
−13.3 kPa (−0.136 kg/cm
2
,
−1.93 psi)] with fuel gauge retainer
remaining open and check that the pressure is applicable.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace refueling EVAP vapor cut valve with fuel tank. Refer to
FL-13, "Removal and Installation"
.
JSBIA1399GB
JSBIA1399GB
REFRIGERANT PRESSURE SENSOR
EC-447
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
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EC
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REFRIGERANT PRESSURE SENSOR
Component Function Check
INFOID:0000000009178378
1.
CHECK REFRIGERANT PRESSURE SENSOR FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009178379
1.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY
1. Disconnect refrigerant pressure sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between refrigerant pressure sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace error-detected parts.
3.
CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.
ECM
Voltage (V)
Connector
+
–
Terminal
F52
63
64
1.0 - 4.0
Refrigerant pressure sensor
Ground
Voltage (V)
Connector
Terminal
E244
1
Ground
Approx. 5
Refrigerant pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E244
1
F52
96
Existed
Refrigerant pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E244
3
F52
64
Existed
EC-448
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace refrigerant pressure sensor. Refer to
HA-38, "CONDENSER : Removal and Installation"
.
NO
>> Repair or replace error-detected parts.
Refrigerant pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E244
2
F52
63
Existed
SENSOR POWER SUPPLY2 CIRCUIT
EC-449
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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SENSOR POWER SUPPLY2 CIRCUIT
Description
INFOID:0000000009178380
ECM supplies a voltage of 5 V to some of the sensors systematically divided into 2 groups, respectively.
Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simultaneously
in the sensors belonging to the same group as the short-circuited sensor.
Sensor power supply 1
• Accelerator pedal position (APP) sensor 1
• Camshaft position (CMP) sensor (PHASE)
• Electric throttle control actuator
• Battery current sensor
NOTE:
If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.
Sensor power supply 2
• Accelerator pedal position (APP) sensor 2
• Crankshaft position (CKP) sensor (POS)
• Refrigerant pressure sensor
• EVAP control system pressure sensor
• Engine oil pressure sensor
Diagnosis Procedure
INFOID:0000000009178381
1.
CHECK SENSOR POWER SUPPLY 1
1. Turn ignition switch OFF.
2. Disconnect ECM harness connectors
3. Turn ignition switch ON.
4. Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
NO
>> GO TO 2.
2.
CHECK SENSOR POWER SUPPLY 2 CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect following sensors harness connector.
3. Check harness for short to power and short to ground, between the following terminals.
+
−
Voltage
(Approx.)
ECM
Connector
Terminal
F52
54
Ground
5 V
96
E16
103
107
ECM
Sensor
+
Name
+
Connector
Terminal
Connector
Terminal
F52
54
CKP sensor (POS)
F11
1
96
Refrigerant pressure sensor
E244
1
E16
103
APP sensor 2
E31
5
107
EVAP control system pressure sensor
B36
3
EOP sensor
F54
3
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