Infiniti F50. Manual — part 482
DTC P1464 FUEL LEVEL SENSOR
EC-569
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
EBS00MLH
TBWM0157E
EC-570
DTC P1464 FUEL LEVEL SENSOR
Specification data are reference values and are measured between each terminal and ground.
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.
Diagnostic Procedure
EBS00MLI
1.
CHECK FUEL LEVEL SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Disconnect combination meter harness connector.
4.
Check harness continuity between ECM terminal 107 and combination meter terminal 29.
Refer to Wiring Diagram.
5.
Also check harness for short to power.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors F105, M135
●
Joint connector-15
●
Harness for open and short between ECM and combination meter.
>> Replace open circuit or short to power in harness or connectors.
3.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Removal and Installation
EBS00MLJ
FUEL LEVEL SENSOR
Refer to
FL-3, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
119
R/L
Fuel level sensor
[Ignition switch “ON”]
Approximately 0 - 4.8V
Output voltage varies with fuel
level.
107
B
Fuel level sensor ground
[Engine is running]
●
Idle speed
Approximately 0V
Continuity should exist.
DTC P1480 COOLING FAN SPEED CONTROL SOLENOID VALVE
EC-571
C
D
E
F
G
H
I
J
K
L
M
A
EC
DTC P1480 COOLING FAN SPEED CONTROL SOLENOID VALVE
PFP:21010
Description
EBS00MLK
SYSTEM DESCRIPTION
This system controls the cooling fan operating speed. The opening of the cooling fan speed control solenoid
valve changes to control oil pressure provided to the cooling fan drive pump.
This system consists of the cooling fan pump, cooling fan drive pump, cooling fan speed control solenoid
valve, oil cooler, cooling fan fluid reservoir, etc.
The cooling fan pump is operated by engine with the drive belts and provides oil pressure to the cooling fan
drive pump which operates the cooling fan. The cooling fan speed control solenoid valve is installed between
the cooling fan pump and cooling fan drive pump. The solenoid valve repeats ON/OFF operation according to
the signal sent from the ECM. The opening of the solenoid valve varies for optimum engine control. The opti-
mum value stored in the ECM is determined by considering various engine conditions.
COOLING FAN SPEED CONTROL
The ECM controls the cooling fan speed corresponding to the engine speed, the radiator coolant temperature,
refrigerant pressure, vehicle speed, air conditioner switch signal, etc.
The ECM determines the target fan speed based on the basic fan speed considering the radiator coolant tem-
perature and the engine speed. The ECM controls fan speed between 0 to 2,550 rpm.
When the cooling fan speed control solenoid valve is malfunctioning (does not operate), the cooling fan is
operated at the maximum speed by engine through the drive belts.
Cooling Fan Basic Speed
unit: rpm
PBIB0116E
Sensor
Input signal to ECM
ECM function
Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)
Engine speed
Cooling fan speed control
Cooling fan speed control
solenoid valve
Accelerator pedal position sensor
Accelerator pedal position
Radiator coolant temperature sensor
Radiator coolant temperature
Refrigerant pressure sensor
Refrigerant pressure
Wheel sensors (CAN communication)
Vehicle speed
A/C auto amp. (CAN communication)
Air conditioner switch signal
Air condi-
tioner
Refrigerant pressure
Vehicle speed
Less than 20 km/h
(12 MPH)
20 - 80 km/h
(12 - 50 MPH)
More than 80 km/h
(50 MPH)
OFF
-
300
300
300
ON
Less than 680 kPa (6.94 kg/cm
2
, 98.6 psi)
700
400
300
680 - 1,660 kPa (6.94 - 16.93 kg/cm
2
, 98.6 - 240.7 psi)
900
700
300
1,660 - 1,960 kPa (16.93 - 19.99 kg/cm
2
, 240.7 - 284.2
psi)
1100
1100
1250
More than 1,960 kPa (19.99 kg/cm
2
, 284.2 psi)
1250
1200
1250
EC-572
DTC P1480 COOLING FAN SPEED CONTROL SOLENOID VALVE
COMPONENT DESCRIPTION
Cooling Fan Speed Control Solenoid Valve
The cooling fan speed control solenoid valve uses a ON/OFF duty to control the pressure of the cooling fan
fluid from the cooling fan pump. This solenoid valve is moved by ON/OFF pulse from the ECM. The longer the
ON pulse is sent to the solenoid valve, the lower speed the cooling fan operates.
CONSULT-II Reference Value in Data Monitor Mode
EBS00MLL
Specification data are reference values.
On Board Diagnosis Logic
EBS00MLM
DTC Confirmation Procedure
EBS00MLN
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
PROCEDURE FOR MALFUNCTION A
With CONSULT-II
1.
Turn ignition switch “ON”.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Confirm “RADIATOR TEMP” indicates less than 80
°
C (176
°
F).
If not, cool down the engine.
4.
Start engine and let it idle for at least 5 seconds.
5.
If 1st trip DTC is detected, go to
EC-575, "Diagnostic Procedure"
.
With GST
1.
Turn ignition switch “ON”.
2.
Set voltmeter probes between ECM terminal 122 (radiator coolant temperature sensor signal) and engine
ground.
3.
Check the voltage should be above 1.23V.
If not, cool down the engine.
4.
Start engine and let it idle for at least 5 seconds.
5.
If 1st trip DTC is detected, go to
EC-575, "Diagnostic Procedure"
.
PROCEDURE FOR MALFUNCTION B
With CONSULT-II
1.
Turn ignition switch “OFF”.
2.
Disconnect radiator coolant temperature sensor harness connector.
MONITOR ITEM
CONDITION
SPECIFICATION
TRGT FAN RPM
●
Ignition switch: ON (Engine stopped)
0 rpm
●
Engine: Idle
300 - 2,550 rpm
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1480
1480
Cooling fan speed control
solenoid valve circuit
A)
An excessively low ampere of current flows
through the cooling fan speed control solenoid
valve to ECM, even though the radiator coolant
temperature is low,
●
Harness or connectors
(Cooling fan speed control
solenoid valve circuit is open
or shorted.)
●
Cooling fan speed control
solenoid valve
B)
An excessively high ampere of current flows
through the cooling fan speed control solenoid
valve to ECM, even though the radiator coolant
temperature is high.
PBIB1863E
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст