Nissan Quest E52. Instruction — part 558
EC-442
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
Component Function Check
INFOID:0000000009651302
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:0000000009651303
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
Terminal
F8
63
(Refrigerant pressure sensor signal)
64
(Sensor ground)
1.0 - 4.0
Refrigerant pressure sensor
Ground
Voltage (V)
Connector
Terminal
E300
1
Ground
Approx. 5
Refrigerant pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E300
1
F8
96
Existed
REFRIGERANT PRESSURE SENSOR
EC-443
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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-42, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace refrigerant pressure sensor. Refer to
NO
>> Repair or replace error-detected parts.
Refrigerant pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E300
3
F8
64
Existed
Refrigerant pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E300
2
F8
63
Existed
EC-444
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
SENSOR POWER SUPPLY2 CIRCUIT
SENSOR POWER SUPPLY2 CIRCUIT
Description
INFOID:0000000009888617
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
Diagnosis Procedure
INFOID:0000000009888618
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-42, "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.
Is the inspection result normal?
YES
>> GO TO 3.
+
−
Voltage
(Approx.)
ECM
Connector
Terminal
F8
54
Ground
5 V
96
E16
103
107
ECM
Sensor
+
Name
+
Connector
Terminal
Connector
Terminal
F8
54
CKP sensor (POS)
F20
1
96
Refrigerant pressure sensor
E300
1
E16
103
APP sensor 2
E110
5
107
EVAP control system pressure sensor
B22
3
SENSOR POWER SUPPLY2 CIRCUIT
EC-445
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> Repair or replace error-detected parts.
3.
CHECK COMPONENTS
Check the following.
• Crankshaft position sensor (POS) (Refer to
EC-273, "Component Inspection"
• Refrigerant pressure sensor (Refer to
.)
• APP sensor 2 (Refer to
EC-405, "Component Inspection"
• EVAP control system pressure sensor (Refer to
EC-308, "Component Inspection"
.)
Is the inspection result normal?
YES
GI-42, "Intermittent Incident"
.
NO
>> Replace malfunctioning component.
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