Nissan Quest E52. Instruction — part 552
EC-418
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
COOLING FAN
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 4.
NO
>> Perform the trouble diagnosis for power supply circuit.
4.
CHECK COOLING FAN MOTOR CIRCUIT-I
1.
Disconnect cooling fan motor-2 harness connector.
2.
Check the continuity between cooling fan relay-2, -3 harness connectors and cooling fan motor-1, -2 har-
ness connectors.
3.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Perform the trouble diagnosis for power supply circuit.
5.
CHECK COOLING FAN MOTOR CIRCUIT-II
1.
Check the continuity between IPDM E/R harness connector and cooling fan motor-1, -2 harness connec-
tor.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Perform the trouble diagnosis for power supply circuit.
6.
CHECK COOLING FAN MOTOR CIRCUIT-III
1.
Check the continuity between cooling fan relay-2, -3 harness connectors and ground.
Cooling fan motor-1
Ground
Voltage
Connector
Terminal
E301
1
Ground
Battery voltage
2
Cooling fan relay
Cooling fan motor
Continuity
Connector
Terminal
Connector
Terminal
E57
(cooling fan relay-2)
3
E302
(Cooling fan motor-2)
2
Existed
7
E301
(Cooling fan motor-1)
3
E59
(cooling fan relay-3)
3
E302
(Cooling fan motor-2)
1
7
E301
(Cooling fan motor-1)
4
IPDM E/R
Cooling fan motor
Continuity
Connector
Terminal
Connector
Terminal
E10
35
E301
(Cooling fan motor-1)
4
Existed
38
E302
(Cooling fan motor-2)
1
COOLING FAN
EC-419
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
7.
CHECK COOLING FAN MOTOR CIRCUIT-IV
1.
Check the continuity between cooling fan motor-2 harness connector and ground.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
8.
CHECK COOLING FAN RELAYS-2 AND -3
Check cooling fan relays-2 and -3. Refer to
EC-420, "Component Inspection (Cooling Fan Relay)"
.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace malfunctioning cooling fan relay.
9.
CHECK COOLING FAN MOTORS-1 AND -2
Check cooling fan motors-1 and -2. Refer to
EC-419, "Component Inspection (Cooling Fan Motor)"
.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace malfunctioning cooling fan motor. Refer to
10.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-42, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
.
NO
>> Repair or replace error-detected parts.
Component Inspection (Cooling Fan Motor)
INFOID:0000000009651278
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.
Cooling fan motor
Ground
Continuity
Connector
Terminal
E57
(cooling fan relay-2)
6
Ground
Existed
E59
(cooling fan relay-3)
6
Cooling fan motor-2
Ground
Continuity
Connector
Terminal
E302
3
Ground
Existed
4
EC-420
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
COOLING FAN
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
.
Component Inspection (Cooling Fan Relay)
INFOID:0000000009651279
1.
CHECK COOLING FAN RELAY
1.
Disconnect cooling fan relays -2, -3 harness connectors.
2.
Check continuity between cooling fan relay -2, -3 terminals
under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace cooling fan relay.
Condition
Terminals
(+)
(
−
)
Cooling fan motor
A
1
3 and 4
2
3 and 4
1 and 2
3
1 and 2
4
B
1, 2
3, 4
Terminals
Conditions
Continuity
3 and 5
6 and 7
12 V direct current supply between terminals 1 and 2
Existed
No current supply
Not existed
SEF745U
ELECTRICAL LOAD SIGNAL
EC-421
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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ELECTRICAL LOAD SIGNAL
Description
INFOID:0000000009651280
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred via
the CAN communication.
Component Function Check
INFOID:0000000009651281
1.
CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
1.
Turn ignition switch ON.
2.
Connect CONSULT and select “DATA MONITOR” mode.
3.
Select “LOAD SIGNAL” and check indication under the following conditions.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Proceed to
.
2.
CHECK LIGHTING SWITCH FUNCTION
Check “LOAD SIGNAL” indication under the following conditions.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Proceed to
.
3.
CHECK HEATER FAN CONTROL SWITCH FUNCTION
Select “HEATER FAN SW” and check indication under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009651282
1.
INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to
Which circuit is related to the incident?
Rear window defogger>>GO TO 2.
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.
2.
CHECK REAR WINDOW DEFOGGER SYSTEM
Check rear window defogger system. Refer to
Monitor item
Condition
Indication
LOAD SIGNAL
Rear window defogger switch
ON
ON
OFF
OFF
Monitor item
Condition
Indication
LOAD SIGNAL
Lighting switch
ON at 2nd position
ON
OFF
OFF
Monitor item
Condition
Indication
HEATER FAN SW
Heater fan control switch
ON
ON
OFF
OFF
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