Nissan Frontier D40. Instruction — part 541
COOLING FAN
EC-855
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
4.
CHECK COOLING FAN MOTOR
EC-855, "Component Inspection"
OK or NG
OK
>> GO TO 5.
NG
>> Replace cooling fan motor.
5.
CHECK INTERMITTENT INCIDENT
Perform
GI-46, "Intermittent Incident"
.
OK or NG
OK
>> INSPETION END
NG
>> Repair or replace harness or connector.
Component Inspection
INFOID:0000000005273873
COOLING FAN MOTOR
1.
Disconnect cooling fan motor harness connectors.
2.
Supply cooling fan motor terminals with battery voltage and
check operation.
Cooling fan motor should operate.
If NG, replace cooling fan motor.
Cooling fan speed
Cooling fan motor terminals
(+)
(
−
)
Low
1
3 and 4
2
3 and 4
High
1 and 2
3 and 4
SEF734W
EC-856
< COMPONENT DIAGNOSIS >
[VQ40DE]
ELECTRICAL LOAD SIGNAL
ELECTRICAL LOAD SIGNAL
Description
INFOID:0000000005273874
The electrical load signal (Headlamp switch signal, etc.) is transferred through the CAN communication line
from BCM to ECM via IPDM E/R.
Diagnosis Procedure
INFOID:0000000005273875
1.
CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
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.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 4.
2.
CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Check “LOAD SIGNAL” indication under the following conditions.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 5.
3.
CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION
Select “HEATER FAN SW” and check indication under the following conditions.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 6.
4.
CHECK REAR WINDOW DEFOGGER SYSTEM
>> INSPECTION END
5.
CHECK HEADLAMP SYSTEM
>> INSPECTION END
6.
CHECK HEATER FAN CONTROL SYSTEM
HAC-58, "Symptom Matrix Chart"
(Type 1) or
HAC-129, "Symptom Matrix Chart"
(Type 2).
Condition
Indication
Rear window defogger switch: ON
ON
Rear window defogger switch: OFF
OFF
Condition
Indication
Lighting switch: ON at 2nd position
ON
Lighting switch: OFF
OFF
Condition
Indication
Heater fan control switch: ON
ON
Heater fan control switch: OFF
OFF
ELECTRICAL LOAD SIGNAL
EC-857
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
>> INSPECTION END
EC-858
< COMPONENT DIAGNOSIS >
[VQ40DE]
FUEL INJECTOR
FUEL INJECTOR
Component Description
INFOID:0000000005273876
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector, the coil in the fuel injector 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 duration.
Pulse duration is the length of time the fuel injector remains open.
The ECM controls the injection pulse duration based on engine fuel
needs.
Diagnosis Procedure
INFOID:0000000005273877
1.
INSPECTION START
Turn ignition switch to START.
Are any cylinders ignited?
Yes or No
Yes (With CONSULT-III)>>GO TO 2.
Yes (Without CONSULT-III)>>GO TO 3.
No
>> GO TO 7.
2.
CHECK OVERALL FUNCTION
With CONSULT-III
1.
Start engine.
2.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.
3.
Make sure that each circuit produces a momentary engine speed drop.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 7.
3.
CHECK FUNCTION OF FUEL INJECTOR-I
Without CONSULT-III
1.
Stop engine.
2.
Disconnect harness connector F44 (3), F201 (1)
3.
Turn ignition switch ON.
SEF375Z
2
: Vacuum tank
: Front
AWBIA0686ZZ
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