2005 MERCEDES-BENZ SPRINTER phone

CHECK VALVE
DESCRIPTION
A single washer system check valve is standard
equipment on this model, and is installed in the
washer system plumbing (Fig. 4). The check valve is
integral to the washer plumbing fitting located on
the underside of the cowl top panel behind the rear
of the hood panel opening in the engine compart-
ment. The check valve consists of a molded plastic
body with three barbed hose nipples, one at the inlet
side of the valve body and two at the outlet side. The
check valve cannot be adjusted or repaired and, if
faulty or damaged, it must be replaced.
OPERATION
The check valve provides more than one function
in this application. It serves as a plumbing connector
fitting between the engine compartment and washer
nozzle sections of the washer supply hose. It prevents
washer fluid from draining out of the washer supply
hoses back to the washer reservoir. This drain-back
would result in a lengthy delay from when the
washer switch is actuated until washer fluid was dis-
pensed through the washer nozzles, because the
washer pump would have to refill the washer plumb-
ing from the reservoir to the nozzles. Such a drain-
back condition could also result in water, dirt, or
other outside contaminants being siphoned into the
washer system through the washer nozzle orifice.
This water could subsequently freeze and plug the
nozzle, while other contaminants could interfere with
proper nozzle operation and cause improper nozzle
spray patterns. In addition, the check valve prevents
washer fluid from siphoning through the washer noz-
zles after the washer system is turned Off.
When the washer pump pressurizes and pumps
washer fluid from the reservoir through the washer
plumbing, the fluid pressure unseats a diaphragmfrom over a sump well within the valve by overriding
the spring pressure applied to it by a piston. With
the diaphragm unseated, washer fluid is allowed to
flow toward the two washer nozzles. When the
washer pump stops operating, the spring pressure on
the piston seats the diaphragm over the sump well in
the valve and fluid flow in either direction within the
washer plumbing is prevented. The check valve can-
not be adjusted or repaired and, if faulty or damaged,
it must be replaced.
REMOVAL
(1) Unlatch and open the hood panel.
(2) Disconnect the washer hoses from the three
barbed nipples of the check valve unit (Fig. 5).
(3) Remove the check valve unit from the under-
side of the cowl top panel.
INSTALLATION
(1) Position the check valve unit to the underside
of the cowl top panel (Fig. 5).
(2) Reconnect the three washer hoses to the
barbed nipples of the check valve unit.
(3) Close and latch the hood.
WASHER FLUID LEVEL
SWITCH
DESCRIPTION
The optional washer fluid level switch is a single
pole, single throw switch that is integral to a unique
version of the washer pump/motor unit, located rear-
ward facing side of the washer reservoir, which is
located in a dedicated hole on the top of the sump
area near the back of the windshield washer reser-
Fig. 4 Check Valve
1 - INLET NIPPLE
2 - CHECK VALVE
3 - OUTLET NIPPLE (2)
Fig. 5 Check Valve Remove/Install
1 - COWL HOOD SEAL
2 - CHECK VALVE
3 - HOSE TO WASHER NOZZLE (2)
4 - HOSE FROM WASHER PUMP
VAWIPERS/WASHERS 8R - 7

Component Page
Map/Reading Lamp Switch.............. 8W-44
Marker Lamp Connector................ 8W-51
Marker Lamps........................ 8W-50
Mass Air Flow Sensor.................. 8W-30
Master Door Lock Switch............... 8W-61
Metering Pump....................... 8W-42
Microphone Connector.................. 8W-55
Multi-Function Switch......... 8W-50, 52, 53, 54
Optional Equipment Relay.............. 8W-11
Panic Alarm Switch.................... 8W-39
Parking Brake Switch.................. 8W-35
Power Distribution Center.............. 8W-10
Power Mirror Motors................... 8W-62
Power Mirror Switch................... 8W-62
Power Window Motors.................. 8W-60
Power Window Switches................ 8W-60
Radio Antenna........................ 8W-47
Radio............................... 8W-47
Radio/Cellular Antenna................. 8W-55
Reading Lamp Connector............... 8W-44
Recirculated Air Solenoid Valve........... 8W-42
Refrigerant Pressure Sensor............. 8W-42
Relay Block.......................... 8W-11
Roof Fan Motor....................... 8W-42
Splices.............................. 8W-70
Seat Belt Switch...................... 8W-43
Seatbelt Tensioners.................... 8W-43
Security System Module................ 8W-39
Sensor.............................. 8W-30
Sentry Key Remote Entry Module......... 8W-39
Shifter Assembly...................... 8W-31
Siren............................ 8W-39, 41
SKREEM Antenna.................... 8W-39
SKREEM Transponder................. 8W-39
Speakers............................ 8W-47Component Page
Speed Control Switch.................. 8W-33
Starter Motor Relay................... 8W-21
Starter Motor........................ 8W-21
Tail Lamp Assemblies.................. 8W-51
TCS Switch.......................... 8W-35
Temperature Switch................... 8W-42
Time Delay Relay..................... 8W-44
Towing/Intrusion Sensor On/Off Switch..... 8W-39
Trailer Tow Connector.................. 8W-54
Trailer Tow Control Module.............. 8W-54
Transmission Control Module............ 8W-31
Transmission Relay.................... 8W-31
Transmission Solenoid Assembly.......... 8W-31
Turn Signals......................... 8W-52
Turn Signal Relay..................... 8W-52
Turn Signal Switch.................... 8W-50
Turn Signal/Anti-Theft Alarm Relays . . . 8W-39, 52
Warm Air Auxiliary Control Module....... 8W-42
Warm Air Auxiliary Heater Assembly...... 8W-42
Warm Air Heater Control Module......... 8W-42
Washer On/Off Switch.................. 8W-53
Washer Pump Motor-Front.............. 8W-53
Water Cycle Valve..................... 8W-42
Water In Fuel Sensor.................. 8W-30
Wheel Speed Sensors................... 8W-35
Window Defoggers..................... 8W-48
Window Defogger Module-Rear........... 8W-48
Window Defogger Relays................ 8W-48
Window Defogger Switch-Rear........... 8W-48
Wiper Motor-Front.................... 8W-53
Wiper On/Off Relay.................... 8W-53
Wiper Switch......................... 8W-53
Wiper/Turn Signal/Engine Start Control
Module........................... 8W-50
8W - 02 - 2 8W-02 COMPONENT INDEXVA

8W-55 NAVIGATION/TELECOMMUNICATIONS
Component Page
CTEL Antenna Connector............. 8W-55-3
CTEL Connector..................... 8W-55-2
Fuse 9............................ 8W-55-2
Fuse 13............................ 8W-55-2
Fuse 15............................ 8W-55-3
Fuse Block No. 1.................... 8W-55-3
Fuse Block No. 3.................... 8W-55-2Component Page
G203.............................. 8W-55-2
Microphone Connector................ 8W-55-2
Optional Equipment Relay............. 8W-55-2
Radio........................... 8W-55-2, 3
Radio/Cellular Antenna............... 8W-55-3
Speaker- Left Front Door Assembly...... 8W-55-2
VA8W-55 NAVIGATION/TELECOMMUNICATIONS 8W - 55 - 1

Component Page
Differential Lock Solenoid Valve........ 8W-80-29
Dome Lamp....................... 8W-80-29
Door Lock Motor/Ajar Switch
Assembly-Driver C1............... 8W-80-30
Door Lock Motor/Ajar Switch
Assembly-Driver C2............... 8W-80-30
Door Lock Motor/Ajar Switch
Assembly-Left Sliding C1........... 8W-80-30
Door Lock Motor/Ajar Switch
Assembly-Left Sliding C2........... 8W-80-30
Door Lock Motor/Ajar Switch
Assembly-Passenger C1............ 8W-80-30
Door Lock Motor/Ajar Switch
Assembly-Passenger C2............ 8W-80-31
Door Lock Motor/Ajar Switch
Assembly-Rear C1................ 8W-80-31
Door Lock Motor/Ajar Switch
Assembly-Rear C2................ 8W-80-31
Door Lock Motor/Ajar Switch
Assembly-Right Sliding C1.......... 8W-80-31
Door Lock Motor/Ajar Switch
Assembly-Right Sliding C2.......... 8W-80-31
Dosing Pump...................... 8W-80-32
EGR Valve........................ 8W-80-32
Engine Control Module C1............ 8W-80-32
Engine Control Module C2............ 8W-80-32
Engine Control Module C3............ 8W-80-33
Engine Control Module C4............ 8W-80-33
Engine Control Module C5............ 8W-80-34
Engine Coolant Level Switch.......... 8W-80-34
Engine Coolant Temperature Sensor.... 8W-80-34
Engine Oil Sensor................... 8W-80-34
Evaporator Temperature Sensor........ 8W-80-35
Fog Lamp Switch................... 8W-80-35
Fuel Injector No. 1.................. 8W-80-35
Fuel Injector No. 2.................. 8W-80-35
Fuel Injector No. 3.................. 8W-80-35
Fuel Injector No. 4.................. 8W-80-36
Fuel Injector No. 5.................. 8W-80-36
Fuel Level Sensor................... 8W-80-36
Fuel Pressure Sensor................ 8W-80-36
Fuel Pressure Solenoid............... 8W-80-36
Fuel Shutdown Solenoid.............. 8W-80-37
Fuel Temperature Sensor............. 8W-80-37
Fuse Block No. 1 C1................. 8W-80-37
Fuse Block No. 1 C2................. 8W-80-37
Fuse Block No. 1 C3................. 8W-80-38
Fuse Block No. 1 C4................. 8W-80-38
Fuse Block No. 1 C5................. 8W-80-38
Glow Plug Control Module C1......... 8W-80-38
Glow Plug Control Module C2......... 8W-80-39
Headlamp Adjust Switch............. 8W-80-39
Headlamp Assembly-Left............. 8W-80-39
Headlamp Assembly-Right............ 8W-80-40
Heat Exchanger Connector............ 8W-80-40Component Page
Heat Exchanger Switch.............. 8W-80-40
Heated Seat Module-Driver........... 8W-80-40
Heated Seat Module-Passenger........ 8W-80-41
Heated Seat Switch-Driver............ 8W-80-41
Heated Seat Switch-Passenger......... 8W-80-41
Heater Timer-Auxiliary.............. 8W-80-41
Hood Ajar Switch................... 8W-80-42
Horn............................. 8W-80-42
Horn (VTSS)....................... 8W-80-42
Horn-Switch....................... 8W-80-42
Ignition Lock Switch................. 8W-80-43
Instrument Cluster C1............... 8W-80-43
Instrument Cluster C2............... 8W-80-43
Instrument Panel Socket............. 8W-80-44
Intake Air Temperature Sensor........ 8W-80-44
Interior Lamp No. 1................. 8W-80-44
Interior Lamp No. 2................. 8W-80-44
Interior Lamp No. 3................. 8W-80-44
Interior Lamp No. 4................. 8W-80-45
Interior Lamp No. 5................. 8W-80-45
Interior Lamp-Left.................. 8W-80-45
Interior Lamp-Middle Front........... 8W-80-45
Interior Lamp-Middle Rear........... 8W-80-46
Interior Lamp-Rear No. 1............. 8W-80-46
Interior Lamp-Rear No. 2............. 8W-80-46
Interior Lamp-Right................. 8W-80-47
Interior Light Switch................ 8W-80-47
Interior Light Switch-Driver........... 8W-80-47
Interior Light Switch-Passenger........ 8W-80-47
Interior Light Switch-Rear............ 8W-80-48
Interior Lighting Connector........... 8W-80-48
Intrusion Sensor No. 1............... 8W-80-48
Intrusion Sensor No. 2............... 8W-80-48
Intrusion Sensor No. 3............... 8W-80-48
Kick Down Switch.................. 8W-80-49
License Plate Lamp No. 1............. 8W-80-49
License Plate Lamp No. 2............. 8W-80-49
Locker Switch No. 1................. 8W-80-49
Locker Switch No. 2................. 8W-80-49
Low Fuel Pressure Sensor............ 8W-80-50
Map/Reading Lamp Switch............ 8W-80-50
Marker Lamp Connector............. 8W-80-50
Marker Lamp No. 1-Left Front......... 8W-80-50
Marker Lamp No. 1-Right Front....... 8W-80-50
Marker Lamp No. 2-Left Front......... 8W-80-51
Marker Lamp No. 2-Right Front....... 8W-80-51
Marker Lamp-Left Center............ 8W-80-51
Marker Lamp-Left Rear.............. 8W-80-51
Marker Lamp-Right Center........... 8W-80-51
Marker Lamp-Right Rear............. 8W-80-52
Mass Air Flow Sensor................ 8W-80-52
Master Door Lock Switch............. 8W-80-52
Metering Pump..................... 8W-80-52
Microphone Connector............... 8W-80-52
8W - 80 - 2 8W-80 CONNECTOR PIN-OUTSVA

COURTESY LAMP-PASSENGER DOOR
CAV CIRCUIT FUNCTION
1 16RD/YL FUSED B(+)
2 16BR/WT FRONT COURTESY LAMPS CONTROL
COURTESY LAMP-RIGHT SLIDING DOOR
CAV CIRCUIT FUNCTION
1 16RD/YL FUSED B(+)
2 16BR/WT DOOR AJAR SWITCH SENSE
CRANKCASE HEATER - BLACK
CAV CIRCUIT FUNCTION
1 18BR GROUND
2 16BK/RD FUSED ENGINE CONTROL RELAY OUTPUT
CRANKSHAFT POSITION SENSOR - BLACK
CAV CIRCUIT FUNCTION
1 20DG SENSOR GROUND
2 20DG/WT CRANKSHAFT POSITION SENSOR SIGNAL
CTEL CONNECTOR
CAV CIRCUIT FUNCTION
1 16BR GROUND
4 16DG/YL/BK RADIO MUTE
7 18BL/DG SPEAKER-LEFT FRONT DOOR ASSEMBLY (-)
9 18BR CTEL CONNECTOR CAV 9 TO MICROPHONE CON-
NECTOR CAV 1
10 18BK/BL FUSED OPTIONAL EQUIPMENT RELAY OUTPUT
11 18RD/BK/WT FUSED B(+)
12 18BK/BL FUSED OPTIONAL EQUIPMENT RELAY OUTPUT
16 18BL/YL SPEAKER-LEFT FRONT DOOR ASSEMBLY (+)
18 18BL CTEL CONNECTOR CAV 18 TO MICROPHONE CON-
NECTOR
8W - 80 - 28 8W-80 CONNECTOR PIN-OUTSVA

MARKER LAMP-RIGHT REAR
CAV CIRCUIT FUNCTION
1 16GY/RD LAMP DRIVER
2 16BR GROUND
MASS AIR FLOW SENSOR - BLACK
CAV CIRCUIT FUNCTION
2 20YL/RD MASS AIR FLOW SENSOR 12 VOLT SUPPLY
3 20BR/YL SENSOR GROUND
4 20BR/BK MASS AIR FLOW SENSOR 5 VOLT SUPPLY
5 20YL/DG MASS AIR FLOW SENSOR SIGNAL
MASTER DOOR LOCK SWITCH
CAV CIRCUIT FUNCTION
1 16GY/DG/RD LAMP DRIVER
2 16WT/DG PASSENGER DOOR AJAR INDICATOR DRIVER
3 16WT/YL MASTER DOOR LOCK SWITCH SENSE-ALL DOORS
8 16WT/RD MASTER DOOR LOCK SWITCH SENSE-PASSENGER
DOORS
9 16WT/BK DRIVER DOOR AJAR INDICATOR DRIVER
10 16BR GROUND
METERING PUMP
CAV CIRCUIT FUNCTION
1 16DG/RD METERING PUMP DRIVER
2 16BR METERING PUMP GROUND
MICROPHONE CONNECTOR
CAV CIRCUIT FUNCTION
1 18BR MICROPHONE CONNECOTR CAV 1 TO CTEL CON-
NECTOR CAV 9
2 18BL MICROPHONE CONNECOTR CAV 2 TO CTEL CON-
NECTOR CAV 18
8W - 80 - 52 8W-80 CONNECTOR PIN-OUTSVA

CONNECTOR NAME/
NUMBERCOLOR LOCATION FIG.
Lamp Relay-Right Under Driver Seat N/S
License Plate Lamp No. 1 On Rear Of Vehicle N/S
License Plate Lamp No. 2 On Rear Of Vehicle N/S
Locker Switch No. 1 Under Body-Front N/S
Locker Switch No. 2 Under Body-Rear 24
Low Fuel Pressure Sensor Engine Compartment 6,8
Map/Reading Lamp Switch Instrument Panel N/S
Marker Lamp No.1-Left Front Front Of Vehicle-Left Side N/S
Marker Lamp No.2-Left Front Front Of Vehicle-Left Side N/S
Marker Lamp-Left Center Front Of Vehicle-Center Left Side N/S
Marker Lamp-Left Rear Rear Of Vehicle-Left Side N/S
Marker Lamp-Right Center Front Of Vehicle-Center Right Side N/S
Marker Lamp-Right Rear Rear Of Vehicle -Right Side N/S
Mass Air Flow Sensor Engine Compartment 5
Master Door Lock Switch Center Of Instrument Panel N/S
Metering Pump Instrument Panel N/S
Microphone Connector Instrument Panel N/S
Multi-Function Switch Steering Wheel 11
Optional Equipment Relay
(Relay Block)Under Driver Seat N/S
Panic Alarm Switch Instrument Panel N/S
Parking Brake Switch Under Instrument Panel 23
Power Mirror Motor-Driver In Driver Door N/S
Power Mirror Motor-
PassengerIn Passenger Door N/S
Power Mirror Switch On Driver Door N/S
Power Mirror-Driver On Driver Door N/S
Power Mirror-Master On Driver Door N/S
Power Mirror-Passenger On Passenger Door N/S
Power Window Motor-Driver In Driver Door N/S
Power Window Motor-
PassengerIn Passenger Door N/S
Power Window Switch-Driver On Driver Door N/S
Power Window Switch-Master On Driver Door N/S
Power Window Switch-
PassengerOn Passenger Door N/S
Radio Antenna Behind Radio N/S
Radio C1 Behind Radio N/S
Radio C2 Behind Radio N/S
Radio/Cellular Antenna Behind Radio N/S
Reading Lamp Connector Instrument Panel N/S
Recirculated Air Solenoid
ValveUnderhood Right (To The
Instrument Panel)4
VA8W-91 CONNECTOR/GROUND/SPLICE LOCATION 8W - 91 - 7
CONNECTOR/GROUND/SPLICE LOCATION (Continued)