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 

CO-22, "WATER PUMP"

 .

Resistance: Approximately 8

Ω

 [at 20

°

C (68

°

F)]

PBIB0131E