Nissan X-Trail 32. Manual — part 911
COOLING FAN
EC-773
< DTC/CIRCUIT DIAGNOSIS >
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COOLING FAN
Component Function Check
INFOID:0000000010986480
1.
CHECK COOLING FAN FUNCTION
With CONSULT
1.
Turn ignition switch ON.
2.
Perform “COOLING FAN (DUAL)” in “ACTIVE TEST” mode of “IPDM E/R” using CONSULT.
3.
Touch “LOW”, “HI” on the CONSULT screen.
4.
Check that cooling fan operates.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000010986481
1.
CHECK COOLING FAN RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect cooling fan relays-2, -3.
3.
Turn ignition switch ON.
4.
Check the voltage between cooling fan relays-2, -3 harness connectors and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform trouble diagnosis for power supply circuit.
2.
CHECK COOLING FAN MOTOR CIRCUIT-1
Check the voltage between cooling fan relays-2, -3 harness connectors and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 4.
3.
CHECK COOLING FAN RELAY OUTPUT SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connectors.
3.
Check the continuity between cooling fan relay-2, -3 harness connectors and IPDM E/R harness connec-
tor.
+
−
Voltage
Cooling fan relay
Connector
Terminal
F56
(cooling fan relay-2)
1
Ground
Battery voltage
F57
(cooling fan relay-3)
+
−
Voltage
Cooling fan relay
Connector
Terminal
F56
(cooling fan relay-2)
3
Ground
Battery voltage
F57
(cooling fan relay-3)
EC-774
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
COOLING FAN
4.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
4.
CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT
1.
Disconnect cooling fan motor-1 harness connector.
2.
Check the voltage between cooling fan motor-1 harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Perform trouble diagnosis for power supply circuit.
5.
CHECK COOLING FAN MOTOR CIRCUIT-2
1.
Check the continuity between cooling fan relay-2, -3 harness connectors and cooling fan motor-1, -2 har-
ness connectors.
2.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Repair or replace error-detected parts.
6.
CHECK COOLING FAN MOTOR CIRCUIT-3
1.
Check the continuity between IPDM E/R harness connector and cooling fan motor-2 harness connector.
+
−
Continuity
Cooling fan relay
IPDM E/R
Connector
Terminal
Connector
Terminal
F56
(cooling fan relay-2)
2
F74
107
Existed
F57
(cooling fan relay-3)
106
+
−
Voltage
Cooling fan motor-1
Connector
Terminal
F52
1
Ground
Battery voltage
2
+
−
Continuity
Cooling fan relay
Cooling fan motor-1
Connector
Terminal
Connector
Terminal
F56
(cooling fan relay-2)
3
F3
3
Existed
4
F57
(cooling fan relay-3)
3
4
+
−
Continuity
IPDM E/R
Cooling fan motor-2
Connector
Terminal
Connector
Terminal
F73
85
F53
1
Existed
2
COOLING FAN
EC-775
< DTC/CIRCUIT DIAGNOSIS >
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2.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace error-detected parts.
7.
CHECK COOLING FAN MOTOR CIRCUIT-4
1.
Check the continuity between cooling fan relay-3 harness connectors and ground.
2.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair or replace error-detected parts.
8.
CHECK COOLING FAN MOTOR CIRCUIT-5
1.
Check the continuity between cooling fan relay-2 harness connectors and cooling fan motor-2 harness
connector.
2.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair or replace error-detected parts.
9.
CHECK COOLING FAN MOTOR CIRCUIT-4
1.
Check the continuity between cooling fan motor-2 harness connector and ground.
2.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair or replace error-detected parts.
10.
CHECK COOLING FAN RELAY-2 AND -3
EC-776, "Component Inspection (Cooling Fan Relay)"
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace malfunctioning cooling fan relay.
11.
CHECK COOLING FAN MOTORS-1 AND -2
EC-776, "Component Inspection (Cooling Fan Motor)"
+
−
Continuity
Cooling fan relay-3
Connector
Terminal
F57
5
Ground
Existed
+
−
Continuity
Cooling fan relay-2
Cooling fan motor-2
Connector
Terminal
Connector
Terminal
F56
5
F53
1
Existed
2
+
−
Continuity
Cooling fan motor-2
Connector
Terminal
F53
3
Ground
Existed
4
EC-776
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
COOLING FAN
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Replace malfunctioning cooling fan motor. Refer to
CO-47, "Removal and Installation"
.
12.
CHECK INTERMITTENT INCIDENT
Perform
GI-44, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-60, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
Component Inspection (Cooling Fan Motor)
INFOID:0000000010986482
1.
CHECK COOLING FAN MOTOR
1.
Turn ignition switch OFF.
2.
Disconnect cooling fan motor harness connector.
3.
Supply cooling fan motor terminals with battery voltage and check operation.
Check that cooling fan speed of condition B is higher than that of A.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace cooling fan motor. Refer to
CO-47, "Removal and Installation"
Component Inspection (Cooling Fan Relay)
INFOID:0000000010986483
1.
CHECK COOLING FAN RELAYS
1.
Turn ignition switch OFF.
2.
Remove cooling fan relay-2, -3.
3.
Check the continuity between cooling fan relay-2, -3 terminals as per the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace cooling fan relay.
Cooling fan motor
Condition
Terminal
+
–
1
3 and 4
A
2
3 and 4
1 and 2
3
1 and 2
4
1, 2
3, 4
B
Cooling fan relay-2, -3
Conditions
Continuity
+
−
Terminal
3
5
12V direct current supply between termi-
nals 1 and 2
Existed
No current supply
Not existed
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