Nissan Pathfinder. Manual — part 529
EC-422
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
COOLING FAN
3. Also check harness for short to ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK COOLING FAN RELAY
Check cooling fan relay. Refer to
EC-424, "Component Inspection (Cooling Fan Relay)"
.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Replace cooling fan relay. Refer to
5.
CHECK COOLING FAN CONTROL MODULE GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check the continuity between cooling fan control nodule harness connector and ground.
3. Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK COOLING FAN CONTROL SIGNAL CIRCUIT
1. Disconnect IPDM E/R harness connector.
2. Check the continuity between cooling fan control nodule harness connector and IPDM E/R harness con-
nector.
3. 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 CONTROL MODULE OUTPUT SIGNAL CIRCUIT
1. Reconnect all harness connectors disconnected.
2. Disconnect cooling fan control module harness connector.
3. Turn ignition switch ON.
4. Check the voltage between cooling fan control module terminals and ground.
+
−
Continuity
Cooling fan relay
IPDM E/R
Connector
Terminal
Connector
Terminal
E82
2
E119
27
Existed
+
−
Continuity
Cooling fan control module
Connector
Terminal
E225
1
Ground
Existed
+
−
Continuity
Cooling fan control module
IPDM E/R
Connector
Terminal
Connector
Terminal
E225
2
E218
93
Existed
COOLING FAN
EC-423
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair or replace error-detected parts.
8.
CHECK COOLING FAN MOTORS -1 AND -2
Check the cooling fan motor. Refer to
EC-424, "Component Inspection (Cooling Fan Motor)"
YES
>> Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
NO
>> Replace cooling motor. Refer to
CO-17, "Removal and Installation"
.
Component Inspection (Cooling Fan Motor)
INFOID:0000000009178352
1.
CHECK COOLING FAN MOTOR
1. Turn ignition switch OFF.
2. Disconnect cooling fan control module harness connector.
3. Supply cooling fan control module harness connector terminals with battery voltage as per the following,
and check operation.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace malfunctioning cooling fan motor. Refer to
CO-17, "Removal and Installation"
.
Component Inspection (Cooling Fan Relay)
INFOID:0000000009178353
1.
CHECK COOLING FAN RELAY
1. Turn ignition switch OFF.
2. Remove cooling fan relay.
3. Check the continuity between cooling fan relay terminals under
the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace cooling fan relay.
+
−
Voltage
Cooling fan control module
Connector
Terminal
E245
4
Ground
Battery voltage
E246
6
Cooling fan control module
Operation
Motor
Connector
Terminal
+
−
1
E245
4
5
Cooling fan operates.
2
E246
6
7
Cooling fan relay
Conditions
Continuity
+
−
Terminal
3
5
12 V direct current supply between
terminals
and
Existed
No current supply
Not existed
MBIB0057E
EC-424
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
ELECTRICAL LOAD SIGNAL
ELECTRICAL LOAD SIGNAL
Description
INFOID:0000000009178354
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred via
the CAN communication.
Component Function Check
INFOID:0000000009178355
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:0000000009178356
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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