Infiniti EX35. Manual — part 676
EC-446
< COMPONENT DIAGNOSIS >
[VQ35HR]
COOLING FAN
2.
Disconnect cooling fan control module harness connectors E301, E302.
3.
Supply cooling fan control module harness connector 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:0000000003133629
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
12 V direct current supply between terminals 1 and 2
Existed
No current supply
Not existed
SEF090M
ELECTRICAL LOAD SIGNAL
EC-447
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
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EC
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ELECTRICAL LOAD SIGNAL
Description
INFOID:0000000003133630
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred
through the CAN communication line.
Component Function Check
INFOID:0000000003133631
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:0000000003133632
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
EC-448
< COMPONENT DIAGNOSIS >
[VQ35HR]
ELECTRICAL LOAD SIGNAL
>> INSPECTION END
3.
CHECK HEADLAMP SYSTEM
(XENON TYPE) or
(HALOGEN TYPE).
>> INSPECTION END
4.
CHECK HEATER FAN CONTROL SYSTEM
.
>> INSPECTION END
FUEL INJECTOR
EC-449
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
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EC
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FUEL INJECTOR
Description
INFOID:0000000003133633
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.
Component Function Check
INFOID:0000000003133634
1.
INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
YES
>> GO TO 2.
NO
>> Go to
2.
CHECK FUEL INJECTOR FUNCTION
With CONSULT-III
1.
Start engine.
2.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.
3.
Check that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1.
Start engine.
2.
Listen to each fuel injector operating sound.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000003133635
1.
CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect fuel injector harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between fuel injector harness connector and ground.
SEF375Z
Clicking sound should be heard.
PBIB3332E
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