Infiniti G35 (V35) Sedan. Manual — part 576
EC-450
< COMPONENT DIAGNOSIS >
[VQ35HR]
COOLING FAN
3.
CHECK IPDM E/R GROUND CIRCUIT
1.
Disconnect IPDM E/R harness connectors E5, E6.
2.
Check the continuity between IPDM E/R harness connector and ground.
3.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit or short to power in harness or connectors.
4.
CHECK COOLING FAN CONTROL SIGNAL CIRCUIT
1.
Disconnect IPDM E/R harness connector E9.
2.
Check the continuity between IPDM E/R harness connector and cooling fan control module harness con-
nector.
3.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK COOLING FAN CONTROL MODULE OUTPUT SIGNAL CIRCUIT
1.
Reconnect all harness connectors disconnected.
2.
Disconnect cooling fan control module harness connectors E301, E302.
3.
Turn ignition switch ON.
4.
Check the voltage between cooling fan control module harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace cooling fan control module.
6.
CHECK COOLING FAN MOTORS -1 AND -2
EC-451, "Component Inspection (Cooling Fan Motor)"
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace cooling fan motor.
7.
CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect cooling fan relay harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between cooling fan relay harness connector and ground.
IPDM E/R
Ground
Continuity
Connector
Terminal
E5
12
Ground
Existed
E6
41
IPDM E/R
Cooling fan control module
Continuity
Connector
Terminal
Connector
Terminal
E9
97
E37
2
Existed
Cooling fan control module
Ground
Voltage
Connector
Terminal
E301
4
Ground
Battery voltage
E302
6
COOLING FAN
EC-451
< COMPONENT DIAGNOSIS >
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Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• 10A fuse (No. 42)
• IPDM E/R harness connector E7
• 50A fusible link (letter F)
• Harness for open or short between cooling fan relay and fuse
• Harness for open or short between cooling fan relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-III
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connector E6.
3.
Check the continuity between cooling fan relay harness connector and IPDM E/R harness connector.
4.
Check the continuity between cooling fan relay harness connector and cooling fan control module harness
connector.
5.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
10.
CHECK COOLING FAN RELAY
EC-452, "Component Inspection (Cooling Fan Relay)"
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace cooling fan relay.
11.
CHECK INTERMITTENT INCIDENT
Perform
GI-39, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> Repair or replace harness connectors.
Component Inspection (Cooling Fan Motor)
INFOID:0000000000956859
1.
CHECK COOLING FAN MOTOR
1.
Turn ignition switch OFF.
Cooling fan relay
Ground
Voltage
Connector
Terminal
E17
1
Ground
Battery voltage
3
Cooling fan relay
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
E17
2
E6
42
Existed
Cooling fan relay
Cooling fan control module
Continuity
Connector
Terminal
Connector
Terminal
E17
5
E37
3
Existed
EC-452
< COMPONENT DIAGNOSIS >
[VQ35HR]
COOLING FAN
2.
Disconnect cooling fan control module harness connectors E301, E302.
3.
Supply cooling fan control module terminals with battery voltage and check operation.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace cooling fan motor.
Component Inspection (Cooling Fan Relay)
INFOID:0000000000956860
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.
Cooling fan control module
Operation
Motor
Connector
Terminal
(+)
(–)
1
E301
4
5
Cooling fan operates.
2
E302
6
7
Terminals
Conditions
Continuity
3 and 5
12V direct current supply between terminals 1 and 2
Existed
No current supply
Not existed
SEF090M
ELECTRICAL LOAD SIGNAL
EC-453
< COMPONENT DIAGNOSIS >
[VQ35HR]
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ELECTRICAL LOAD SIGNAL
Description
INFOID:0000000000956861
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred
through the CAN communication line from BCM to ECM via IPDM E/R.
Component Function Check
INFOID:0000000000956862
1.
CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
1.
Turn ignition switch ON.
2.
Connect CONSULT-III 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
>> Go to
2.
CHECK LIGHTING SWITCH FUNCTION
Check “LOAD SIGNAL” indication under the following conditions.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Go 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
>> Go to
Diagnosis Procedure
INFOID:0000000000956863
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
.
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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