Nissan Sentra. Manual — part 442
EC-464
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
COOLING FAN
4.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Check IPDM E/R. Refer to
PCS-10, "CONSULT Function (IPDM E/R)"
(With intelligent key sys-
PCS-38, "CONSULT Function (IPDM E/R)"
(Without intelligent key system).
NO
>> Repair or replace error-detected parts.
Component Inspection (Cooling Fan Motor)
INFOID:0000000009758723
1.
CHECK COOLING FAN MOTOR
Supply cooling fan motor terminals with battery voltage and check operation.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace cooling fan motor. Refer to
CO-17, "Removal and Installation"
Cooling fan motor
Condition
Operation
Terminal
+
−
1
4
12 V direct current supply
between terminals 1 and 2
Cooling fan operates.
No supply
Cooling fan not operates.
2
3
12 V direct current supply
between terminals 1 and 2
Cooling fan operates.
No supply
Cooling fan not operates.
REFRIGERANT PRESSURE SENSOR
EC-465
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
REFRIGERANT PRESSURE SENSOR
Component Function Check
INFOID:0000000009758724
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 the voltage between ECM harness connector terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009758725
1.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY
1. Turn ignition OFF.
2. Disconnect refrigerant pressure sensor harness connector.
3. Turn ignition switch ON.
4. 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.
4. Also check harness for short to ground.
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
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
Connector
+
−
Terminal
E16
103
124
1.0 - 4.0 V
+
−
Voltage
(Approx.)
Refrigerant pressure sensor
Connector
Terminal
E35
3
Ground
5.0 V
+
−
Continuity
Refrigerant pressure sensor
ECM
Connector
Terminal
Connector
Terminal
E35
3
E16
104
Existed
EC-466
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
REFRIGERANT PRESSURE SENSOR
4. Also check harness for 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
1. Check the continuity between ECM harness connector and refrigerant pressure sensor harness connec-
tor.
2. Also check harness for short to ground and 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-39, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace refrigerant pressure sensor. Refer to
HAC-110, "Removal and Installation"
(For automatic
air condittioner), or
HAC-191, "Removal and Installation"
(For manual air condittioner).
NO
>> Repair or replace error-detected parts.
+
−
Continuity
Refrigerant pressure sensor
ECM
Connector
Terminal
Connector
Terminal
E35
1
E16
124
Existed
+
−
Continuity
Refrigerant pressure sensor
ECM
Connector
Terminal
Connector
Terminal
E35
2
E16
103
Existed
MALFUNCTION INDICATOR LAMP
EC-467
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
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J
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M
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EC
N
P
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MALFUNCTION INDICATOR LAMP
Component Function Check
INFOID:0000000009758726
1.
CHECK MIL FUNCTION
1. Turn ignition switch ON.
2. Check that MIL lights up.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009758727
1.
CHECK DTC WITH ECM
Check that DTC UXXXX is not displayed.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform trouble diagnosis for DTC UXXXX. Refer to
2.
CHECK DTC WITH COMBINATION METER
Check DTC with combination meter. Refer to
MWI-17, "CONSULT Function (METER/M&A)"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Perform trouble diagnosis for DTC indicated. Refer to
.
3.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace combination meter. Refer to
MWI-77, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
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