Mercedes-Benz Sprinter / Dodge Sprinter. Service manual — part 418
a variable resistor track (card).
REMOVAL
The fuel level sending unit (fuel level sensor) and
float assembly is located on the side of the fuel pump
module (4) (Fig. 30).
(1) Remove fuel pump module from fuel tank.
Refer to Fuel Pump Module Removal/Installation.
(2) Unplug sensor’s 2–wire harness from pump
module electrical connector.
(3) Before disconnecting wiring from 2–wire har-
ness electrical connector, note position of each wire in
the connector. Record this position.
(4) Disconnect wiring from 2–wire harness electri-
cal connector using a terminal pick / removal tool.
Refer to Special Tools in 8W, Wiring for tool part
numbers.
(5) To remove sending unit from pump module,
press on plastic locking tabs (1) (Fig. 30) while slid-
ing sending unit (4) on its tracks.
INSTALLATION
(1) Noting their previous positions, connect wires
from 2–wire harness into its connector.
(2) Plug 2–wire harness connector into pump mod-
ule electrical connector.
(3) Position sending unit (4) (Fig. 31) to tracks on
fuel pump module. Slide and snap into place.
(4) Install fuel pump module. Refer to Fuel Pump
Module Removal/Installation.
Fig. 29 FUEL LEVEL SENSOR
1 - RELEASE TABS
2 - ELECTRIC FUEL PUMP
3 - BOTTOM OF FUEL PUMP MODULE
4 - SENDING UNIT
Fig. 30 FUEL LEVEL SENSOR
1 - RELEASE TABS
2 - ELECTRIC FUEL PUMP
3 - BOTTOM OF FUEL PUMP MODULE
4 - SENDING UNIT
Fig. 31 FUEL LEVEL SENSOR
1 - RELEASE TABS
2 - ELECTRIC FUEL PUMP
3 - BOTTOM OF FUEL PUMP MODULE
4 - SENDING UNIT
VA
FUEL DELIVERY
14 - 29
WATER IN FUEL SENSOR
DESCRIPTION
The water in fuel sensor (WIF) is located in the
fuel filter housing (Fig. 32). The sensor detects the
presence of water in the fuel. If water is present in
the fuel a signal is sent to the ECM and the ECM
signals the instrument cluster, over the CAN bus, to
illuminate the water in fuel warning.
OPERATION
The non-dielectric properties of the water allow the
sensors probes to close the electronic circuit when
water is present in the system. When diesel fuel is
present in the system, it’s dielectric (does not conduct
electricity well) properties do not allow any electrical
contact between the probes. A 12V power signal is
always present in order to illuminate the indicator on
the instrument cluster. For removal and installation
procedure refer to (Refer to 14 - FUEL SYSTEM/
FUEL DELIVERY/FUEL FILTER - REMOVAL).
Fig. 32 WATER IN FUEL SENSOR
1 - WIF SENSOR
2 - WIF DRAIN
3 - FUEL FILTER
4 - FUEL SUPPLY FROM TANK
5 - FUEL SUPPLY TO HIGH PRESSURE PUMP
14 - 30
FUEL DELIVERY
VA
FUEL INJECTION
TABLE OF CONTENTS
page
page
ACCELERATOR PEDAL POSITION SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
. . . . . . . . . . . . . . . . . . . . . . . . . 32
BOOST PRESSURE SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 33
. . . . . . . . . . . . . . . . . . . . . . . . . . . 33
. . . . . . . . . . . . . . . . . . 33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
. . . . . . . . . . . . . . . . . . . . . . . . . 33
CAMSHAFT POSITION SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 33
. . . . . . . . . . . . . . . . . . . . . . . . . . . 34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
. . . . . . . . . . . . . . . . . . . . . . . . . 34
CRANKSHAFT POSITION SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 35
. . . . . . . . . . . . . . . . . . . . . . . . . . . 35
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
. . . . . . . . . . . . . . . . . . . . . . . . . 35
FUEL INJECTOR
. . . . . . . . . . . . . . . . . . . . . . 35
. . . . . . . . . . . . . . . . . . . . . . . . . . . 36
CLASSIFICATION . . . . . . . . . . . . . . . . . . . . . 37
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
. . . . . . . . . . . . . . . . . . . . . . . . . 39
FUEL PRESSURE SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 39
. . . . . . . . . . . . . . . . . . . . . . . . . . . 39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
. . . . . . . . . . . . . . . . . . . . . . . . . 40
FUEL PRESSURE SOLENOID
. . . . . . . . . . . . . . . . . . . . . . . . . 40
. . . . . . . . . . . . . . . . . . . . . . . . . . . 40
STANDARD PROCEDURE - FUEL PRESSURE
. . . . . . . . . . . . . . . . . . . . . . 41
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
. . . . . . . . . . . . . . . . . . . . . . . . . 41
FUEL TEMPERATURE SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 42
. . . . . . . . . . . . . . . . . . . . . . . . . . . 42
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
. . . . . . . . . . . . . . . . . . . . . . . . . 42
INTAKE AIR TEMPERATURE SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 42
. . . . . . . . . . . . . . . . . . . . . . . . . . . 43
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
. . . . . . . . . . . . . . . . . . . . . . . . . 43
INTAKE AIR PRESSURE SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 43
. . . . . . . . . . . . . . . . . . . . . . . . . . . 43
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
. . . . . . . . . . . . . . . . . . . . . . . . . 44
MANIFOLD AIR FLOW (MAF) SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 44
. . . . . . . . . . . . . . . . . . . . . . . . . . . 44
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
. . . . . . . . . . . . . . . . . . . . . . . . . 45
O2 SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 45
. . . . . . . . . . . . . . . . . . . . . . . . . . . 45
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
. . . . . . . . . . . . . . . . . . . . . . . . . 48
VA
FUEL INJECTION
14 - 31
ACCELERATOR PEDAL POSI-
TION SENSOR
DESCRIPTION
The accelerator pedal position sensor (Fig. 1) is
located on the accelerator pedal assembly. The driver
supplies the torque requirements for the engine by
operating the accelerator pedal in accordance with
the desired speed or acceleration. The pedal sensor
converts the mechanical operation of the pedal into
an electrical signal and sends the information to the
ECM. The ECM adjusts the quantity of the fuel that
is injected into the engine.
The accelerator pedal position sensor is serviced as
an assembly with the accelerator pedal assembly.
REMOVAL
(1) Disconnect the negative battery cable.
(2) Disconnect the APP sensor electrical connec-
tors.
(3) Remove the APP sensor fasteners and the sen-
sor (Fig. 2).
INSTALLATION
(1) Connect the accelerator pedal position sensor
wiring harness connector.
Fig. 1 ACCELERATOR PEDAL POSITION SENSOR
1 - APP SENSOR
2 - ACCELERATOR PEDAL
3 - BRAKE PEDAL
Fig. 2 ACCELERATOR PEDAL POSITION SENSOR
1 - APP SENSOR
2 - ACCELERATOR PEDAL
3 - BRAKE PEDAL
Fig. 3 ACCELERATOR PEDAL POSITION SENSOR
1 - APP SENSOR
2 - ACCELERATOR PEDAL
3 - BRAKE PEDAL
14 - 32
FUEL INJECTION
VA
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст