Infiniti F50. Manual — part 483
DTC P1480 COOLING FAN SPEED CONTROL SOLENOID VALVE
EC-573
C
D
E
F
G
H
I
J
K
L
M
A
EC
3.
Connect 2.2 k
Ω
resistor to the radiator coolant temperature sensor harness connector.
4.
Turn ignition switch “ON”.
5.
Select “DATA MONITOR” mode with CONSULT-II.
6.
Start engine and let it idle for at least 5 seconds.
7.
If 1st trip DTC is detected, go to
EC-575, "Diagnostic Procedure"
.
With GST
Follow the procedure “With CONSULT-II”.
PBIB1863E
EC-574
DTC P1480 COOLING FAN SPEED CONTROL SOLENOID VALVE
Wiring Diagram
EBS00MLO
TBWM0048E
DTC P1480 COOLING FAN SPEED CONTROL SOLENOID VALVE
EC-575
C
D
E
F
G
H
I
J
K
L
M
A
EC
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
EBS00MLP
1.
CHECK COOLING FAN SPEED CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect cooling fan speed control solenoid valve harness
connector.
3.
Disconnect ECM harness connector.
4.
Check harness continuity between ECM terminal 47 and cooling
fan speed control solenoid valve terminal 1.
Refer to Wiring Diagram.
5.
Also check harness for short to ground and short to power in
harness connectors.
OK or NG
OK
>> GO TO 2.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
2.
CHECK COOLING FAN SPEED CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN
AND SHORT
1.
Check harness continuity between ECM terminal 28 and cooling fan speed control solenoid valve terminal
2.
Refer to Wiring Diagram.
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to ground and short to power in harness or connectors.
3.
CHECK COOLING FAN SPEED CONTROL SOLENOID VALVE
Refer to
EC-576, "Component Inspection"
OK or NG
OK
>> GO TO 4.
NG
>> Replace cooling fan speed control solenoid valve.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
28
L
Cooling fan speed control
solenoid valve ground
[Engine is running]
Approximately 0V
47
R
Cooling fan speed control
solenoid valve
[Engine is running]
●
Idle speed
6.5 - 8V
PBIB0049E
Continuity should exist.
PBIB0023E
Continuity should exist.
EC-576
DTC P1480 COOLING FAN SPEED CONTROL SOLENOID VALVE
4.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS00MLQ
COOLING FAN SPEED CONTROL SOLENOID VALVE
Check resistance between cooling fan speed control solenoid valve
terminals 1 and 2.
Removal and Installation
EBS00MLR
COOLING FAN SPEED CONTROL SOLENOID VALVE
Cooling fan speed control solenoid valve is built-into the cooling fan pump which is assembled to water pump.
Refer to
Resistance: Approximately 8
Ω
[at 20
°
C (68
°
F)]
PBIB0131E
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