2006 MERCEDES-BENZ SPRINTER ECU

that the arrow on the sensor housing is pointed
toward the outboard side of the vehicle.
(2) Install and tighten the two screws that secure
the side impact sensor to the step well.
(3) Reconnect the vehicle wire harness connector
for the side impact sensor to the sensor connector
receptacle.
(4) Reinstall the trim paneling to the interior of
the front door step well. (Refer to 23 - BODY/INTE-
RIOR/STEPWELL SCUFF PADS - INSTALLATION).
(5) Do not reconnect the battery negative cable at
this time. The supplemental restraint system verifi-
cation test procedure should be performed following
service of any supplemental restraint system compo-
nent. (Refer to 8 - ELECTRICAL/RESTRAINTS -
STANDARD PROCEDURE - VERIFICATION TEST).
VARESTRAINTS 8O - 41

VEHICLE THEFT SECURITY
TABLE OF CONTENTS
page page
VEHICLE THEFT SECURITY
DESCRIPTION..........................1
OPERATION............................1
DIAGNOSIS AND TESTING - VEHICLE THEFT
SECURITY............................1
INTRUSION SENSOR
REMOVAL.............................1
INSTALLATION..........................2
SECURITY SYSTEM MODULE
REMOVAL.............................2
INSTALLATION..........................2SENTRY KEY REMOTE ENTRY MODULE
DESCRIPTION..........................2
OPERATION............................3
REMOVAL.............................3
INSTALLATION..........................4
SIREN
REMOVAL.............................4
INSTALLATION..........................4
TRANSPONDER KEY
DESCRIPTION..........................5
OPERATION............................5
VEHICLE THEFT SECURITY
DESCRIPTION
A vehicle theft alarm with a battery powered siren
is available as an option and includes interior moni-
toring, anti-tow away protection and rear window
monitoring based on the heater wires. The alarm is
automatically activated when the central locking sys-
tem is operated.
The alarm will sound when any of the following
occur:
²A door is opened
²A door is unlocked from inside the vehicle
²The hood is opened
²The vehicle is raised at the front or rear
²The trailer wire harness is disconnected
²Movements inside the vehicle
²The central locking is unlocked by a key at any
other door than the driver's door
The alarm is functional about 30 seconds after the
vehicle is locked using the RKE transmitter or the
key in the driver's door. Activation is indicated by the
indicator lights flashing three times and the warning
lamp flashing in the switch. If persons or animals
remain in the locked vehicle, the operator should
switch off the interior monitor to avoid a false alarm.
OPERATION
The anti-theft alarm is activated/deactivated by
locking/unlocking the vehicle with the remote trans-
mitter or with the key at the driver's door. The key
must be held in the locking position for more than
two seconds. Activation is indicated by the turn sig-
nal lights flashing once. Unlocking the vehicle at one
of the other doors will trigger an alarm.
The interior monitoring system included in the
anti-theft alarm is based on ultrasonics and triggersan alarm if an object intrudes the interior of the
vehicle or if any movement is detected inside the
vehicle. For proper and effective protection, all win-
dows and the sunroof must be closed.
To switch off the interior monitoring system and /
or the anti-tow away protection, a switch with LED
indicator light is provided in the switch panel. An
alarm button enables the operator to trigger an
alarm manually and to lock all doors if they are
closed. Triggering an alarm makes the horn sound
and the turn signals flash until the alarm is switched
off.
The anti-theft alarm control unit includes a gradi-
ent indicator as anti-tow away protection. The gradi-
ent indicator triggers an audible and visual alarm if
the vehicle is lifted (to tow away or to remove the
wheels). The alarm remains effective even if the bat-
tery is disconnected as the horn is powered by its
own battery. The interior monitoring system should
be switched off if people and/or animals are left in
the vehicle.
DIAGNOSIS AND TESTING - VEHICLE THEFT
SECURITY
Any diagnosis of the Vehicle Theft Security
system should begin with the use of a diagnos-
tic scan tool. Refer to the appropriate diagnos-
tic information.
INTRUSION SENSOR
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Insert the tip of a small flat-bladed screwdriver
into the notch on one edge of the dome lamp/intru-
sion sensor unit housing to depress the retainer clip
VAVEHICLE THEFT SECURITY 8Q - 1

and pull that edge of the lamp away from its mount-
ing location (Fig. 1).
(3) Pull the dome lamp/intrusion sensor unit from
its mounting location far enough to access and dis-
connect the vehicle wire harness from the lamp con-
nector receptacle.
(4) Remove the dome lamp/intrusion sensor unit
from its mounting location.
INSTALLATION
(1) Position the dome lamp/intrusion sensor unit to
its mounting location.
(2) Reconnect the vehicle wire harness connector
to the dome lamp/intrusion sensor unit connector
receptacle.
(3) Position the edge of the dome lamp/intrusion
sensor unit housing opposite from the retainer clip
into the mounting hole.
(4) Push firmly and evenly on the notched edge of
the dome lamp/intrusion sensor unit housing until
the retainer clip latches into place.
(5) Connect the battery negative cable.
SECURITY SYSTEM MODULE
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove driver seat cushion.
(3) Remove mounting fasteners.
(4) Disconnect wire harness connector.
INSTALLATION
(1) Connect wire harness connector.
(2) Position module. Install and tighten mounting
fasteners.
(3) Install driver seat cushion.
(4) Connect battery negative cable.
SENTRY KEY REMOTE ENTRY
MODULE
DESCRIPTION
The Sentry Key Remote Entry Module (SKREEM)
(Fig. 2) performs the functions of the Sentry Key
Immobilizer Module (SKIM) and the Remote Keyless
Entry (RKE) module.
SENTRY KEY IMMOBILIZER
The Sentry Key Immobilizer System (SKIS)
authenticates an electronically coded Transponder
Key placed into the ignition and sends a valid/invalid
key message to the Engine Control Module (ECM)
based upon the results. The ªVALID/INVALID KEYº
message communication is performed using a rolling
code algorithm. A ªVALID KEYº message must be
sent to the ECM within two seconds of ignition ON
to free the engine from immobilization. This Control-
ler Area Network (CAN) data bus message is sent to
the ECM after first going through the SKREEM. The
SKREEM is located behind the instrument cluster
and has a separately mounted antenna ring mounted
around the ignition cylinder (Fig. 3) which picks up
the transponder key signal.
Fig. 1 DOME LAMP/INTRUSION SENSOR
1 - NOTCH
2 - SENSOR (3)
3 - HOUSING
4 - SWITCH (2)
Fig. 2 SENTRY KEY REMOTE ENTRY MODULE
(SKREEM)
8Q - 2 VEHICLE THEFT SECURITYVA

REMOTE KEYLESS ENTRY (RKE)
The RKE transmitter uses radio frequency signals
to communicate with the Sentry Key Remote Entry
Module (SKREEM). The SKREEM is hardwired to
the Central Timer Module (CTM). When the operator
presses a button on the transmitter, it sends a spe-
cific request to the SKREEM. In turn, the SKREEM
sends the appropriate request to the CTM to unlock
the vehicle doors.
OPERATION
SENTRY KEY IMMOBILIZER
The Sentry Key Remote Entry Module (SKREEM)
receives an encrypted Radio Frequency (RF) signal
from the transponder key which is read by the
remotely mounted antenna ring at the ignition cylin-
der. The SKREEM then decrypts the signal and
broadcasts the requested remote commands to the
appropriate modules in the vehicle over the Control-
ler Area Network (CAN) data bus. A valid transpon-
der key ID must be incorporated into the RF signal
in order for the SKREEM to pass the message on to
the appropriate modules.
Automatic transponder key synchronization is done
by the SKREEM if a valid transponder key is
inserted into the ignition cylinder, and the ignition is
turned ON. This provides a maximum operation win-
dow for RKE functions.
Each Sentry Key Remote Entry System (SKREES)
consists of a SKREEM, an antenna ring mounted
around the ignition cylinder, and a transponder key.
Each system has a secret key code unique to that
system. The secret key is electronically coded in the
SKREEM and in all programmed transponder keys.
It is used for immobilization and RKE functions for
data security. In addition, each transponder key will
have a unique identification.
REMOTE KEYLESS ENTRY
After pressing the lock button on the RKE trans-
mitter, all of the door locks will lock, the illuminated
entry will turn off (providing all doors are closed),
and the VTSS (if equipped) will arm. After pressing
the unlock button, on the RKE transmitter, one time,
the driver door lock will unlock, the illuminated
entry will turn on the courtesy lamps, and the VTSS
(if equipped) will disarm. After pressing the unlock
button a second time, the remaining door locks will
unlock.
The SKREEM is capable of retaining up to 8 indi-
vidual access codes (8 transmitters). If the PRNDL is
in any position except park, the SKREEM will dis-
able the RKE. Use a diagnostic scan tool or the cus-
tomer programming method to program the RKE
system. However, the SKREEM will only allow RKE
programming when the ignition is in the ON posi-
tion, the PRNDL is in park position, and the VTSS
(if equipped) is disarmed.
REMOVAL
SENTRY KEY REMOTE ENTRY MODULE
(1) Open hood, disconnect and isolate the battery
negative cable.
(2) Wait two minutes for the system reserve capac-
itor to discharge before beginning any system or com-
ponent service.
(3) Remove top cover - cluster (Refer to 23 -
BODY/INSTRUMENT PANEL/TOP COVER - CLUS-
TER - REMOVAL).
(4) Disconnect the one electrical connector to the
SKREEM (Fig. 4) which is the transponder ring con-
nector.
Fig. 3 TRANSPONDER RING
VAVEHICLE THEFT SECURITY 8Q - 3

(5) Pull SKREEM straight out of rear of instru-
ment cluster (Fig. 4) and remove from vehicle.
SENTRY KEY REMOTE ENTRY MODULE TRAN-
SPONDER RING
(1) Open hood, disconnect and isolate the battery
negative cable.
(2) Wait two minutes for the system reserve capac-
itor to discharge before beginning any system or com-
ponent service.
(3) Remove the steering column shrouds.
(4) Unsnap the SKREEM transponder from the
ignition cylinder (Fig. 5).(5) Remove top cover - cluster (Refer to 23 -
BODY/INSTRUMENT PANEL/TOP COVER - CLUS-
TER - REMOVAL).
(6) Disconnect the transponder electrical connector
from the SKREEM (Fig. 4).
(7) Maneuver wiring from instrument panel and
remove transponder from vehicle.
INSTALLATION
SENTRY KEY REMOTE ENTRY MODULE
(1) Push SKREEM straight into the rear of instru-
ment cluster (Fig. 4).
(2) Connect the one electrical connector to the
SKREEM (Fig. 4).
(3) Install the top cover - cluster (Refer to 23 -
BODY/INSTRUMENT PANEL/TOP COVER - CLUS-
TER - INSTALLATION)
(4) Connect the battery negative cable.
(5) Verify vehicle and system operation.
(6) Close hood.
SENTRY KEY REMOTE ENTRY MODULE TRAN-
SPONDER RING
(1) Maneuver wiring through instrument panel
(Fig. 5).
(2) Connect the transponder electrical connect or
to the SKREEM (Fig. 4).
(3) Install the top cover - cluster (Refer to 23 -
BODY/INSTRUMENT PANEL/TOP COVER - CLUS-
TER - INSTALLATION)
(4) Snap the SKREEM transponder in place
around the ignition cylinder (Fig. 5).
(5) Install the steering column shrouds.
(6) Connect the battery negative cable.
(7) Verify vehicle and system operation.
(8) Close hood.
SIREN
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove mounting fasteners.
(3) Disconnect wire harness connector from siren.
INSTALLATION
(1) Connect wire harness connector to siren.
(2) Position siren. Install and tighten mounting
fasteners.
(3) Connect battery negative cable.
Fig. 4 SENTRY KEY REMOTE ENTRY MODULE
(SKREEM) - REMOVE/INSTALL
1 - SENTRY KEY REMOTE ENTRY MODULE (SKREEM)
2 - INSTRUMENT CLUSTER (REAR)
3 - INSTRUMENT PANEL
Fig. 5 TRANSPONDER RING
1 - TRANSPONDER RING
2 - STEERING COLUMN
8Q - 4 VEHICLE THEFT SECURITYVA

TRANSPONDER KEY
DESCRIPTION
The Sentry Key Immobilizer System (SKIS) which
communicates with the Sentry Key Remote Entry
Module (SKREEM), uses a transponder chip that is
integral to each key fob (Fig. 6). Ignition keys are
supplied with the vehicle when it is shipped from the
factory. The transponder chip is located within the
Remote Keyless Entry (RKE) fob.
OPERATION
Each Sentry Key has a unique transponder identi-
fication code permanently programmed into it by the
manufacturer. Likewise, the Sentry Key Remote
Entry Module (SKREEM) has a unique ªSecret Key9
code programmed into it by the manufacturer as
well. When a Sentry Key is programmed into the
memory of the SKREEM, the SKREEM stores the
transponder identification code from the Sentry Key,
and the Sentry Key learns the ªSecret Keyº code
from the SKREEM. Once the Sentry Key learns the
ªSecret Keyº code of the SKREEM, it is also perma-
nently programmed into the transponder's memory.
The Sentry Key's transponder is within the range
of the SKREEM's transponder ring when it is
inserted into the ignition lock cylinder. When the
ignition switch is turned to the ON position, the
SKREEM communicates with the Sentry Key via a
radio frequency (RF) signal. The SKREEM deter-
mines if a valid key is present based on the informa-
tion it receives from the Sentry Key. If a valid key is
detected, that fact is communicated to the Engine
Control Module (ECM) via the Controller Area Net-
work (CAN) data bus and the vehicle is allowed to
continue running. If an invalid key is received by theECM or no status at all is communicated, the vehicle
will stall after two (2) seconds of running. The indi-
cator light will be flashing at this point. The Sentry
Key's transponder can not be repaired. If it is faulty
or damaged, it must be replaced.
Common communication problems:
²Two transponder keys too close together.
²Speed Pass too close to transponder key.
Solid indicator that there is a system failure.
²Loss of ECM communication.
²Failed transponder ring circuit.
Fig. 6 TRANSPONDER KEY
1 - TRANSPONDER KEY FOB
2 - RKE BUTTONS
3 - INDICATOR LIGHT
4 - KEY BLADE RELEASE BUTTON
5 - KEY BLADE
VAVEHICLE THEFT SECURITY 8Q - 5

WIPERS/WASHERS
DESCRIPTION
An electrically operated intermittent wiper and
washer system is standard factory-installed safety
equipment on this model (Fig. 1). The wiper and
washer system includes the following major compo-
nents, which are described in further detail else-
where in this service information:
²Check Valve- The washer system check valve
is integral to the plumbing fitting located in the
washer plumbing between the cowl plenum washer
hose and the two washer nozzle hoses, and is locatedbeneath the cowl top panel at the base of the wind-
shield in the engine compartment.
²Multi-Function Switch- The multi-function
switch is secured to the top of the steering column,
just below the steering wheel. Only the left (lighting)
control stalk, right (wiper) control stalk and the haz-
ard warning switch button for the multi-function
switch are visible, the remainder of the switch is con-
cealed beneath the steering column shrouds. The
multi-function switch contains all of the switches for
Fig. 1 Wiper & Washer System
1 - WASHER RESERVOIR, PUMP/MOTOR, FLUID LEVEL SWITCH 4 - MULTI-FUNCTION (WIPER, WASHER, & LIGHTING) SWITCH
2 - WIPER MOTOR, LINKAGE & PIVOTS MODULE 5 - RAIN SENSOR (W/AUTOMATIC WIPERS ONLY)
3 - WIPER RELAY 6 - RAIN SENSOR CONTROL MODULE (W/AUTOMATIC WIPERS
ONLY)
8R - 2 WIPERS/WASHERSVA

both the wiper and washer systems. (Refer to 8 -
ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/
MULTI-FUNCTION SWITCH - DESCRIPTION)
²Rain Sensor- Vehicles equipped with an
optional automatic wiper feature have an electronic
rain sensor concealed within the base of the rear
view mirror unit on the inside of the laminated wind-
shield glass.
²Rain Sensor Control Module- Vehicles
equipped with an optional automatic wiper feature
have an electronic rain sensor control module located
under the lower instrument panel above the acceler-
ator pedal in the passenger compartment of the vehi-
cle.
²Washer Fluid Level Switch- The optional
washer fluid level switch is integral to a unique ver-
sion of the washer pump/motor unit, which is located
in a dedicated hole on the top of the sump area near
the back of the windshield washer reservoir on the
right front fender wheel house in the engine com-
partment.
²Washer Nozzle- A single washer nozzle with
three separate orifices is secured with integral snap
features to each wiper arm. The hoses for the washer
nozzles are concealed beneath a molded plastic guide
on the underside of each wiper arm and routed to the
engine compartment through unique molded plastic
elbow fittings located near each wiper pivot at the
base of the windshield.
²Washer Pump/Motor- Two different washer
pump/motor units are available for this model. One
version has an integral washer fluid level switch that
provides a hard wired input to the instrument cluster
for control of the optional washer fluid indicator. The
washer pump/motor unit is located in a dedicated
hole on the top of the sump area near the back of the
windshield washer reservoir on the right front fender
wheel house in the engine compartment.
²Washer Reservoir- The washer reservoir is
located on the right front fender wheel house in the
engine compartment. The washer reservoir filler is
accessed from the right front corner of the engine
compartment.
²Wiper Arm- The two unequal length wiper
arms are secured to the two wiper pivots, which
extend through the cowl panel near the base of the
windshield. The longer arm is installed on the left
(driver) side of the windshield.
²Wiper Blade- The two unequal length wiper
blades are secured to the two wiper arms, and are
parked on the glass near the bottom of the wind-
shield when the wiper system is not in operation.
The longer blade is installed on the left (driver) side
of the windshield.
²Wiper Linkage- The wiper pivots are the only
visible components of the wiper linkage. The remain-
der of the linkage is concealed within the engine
compartment just behind the hood opening. Thewiper linkage module includes the two wiper drive
links, the wiper motor crank arm, the two wiper piv-
ots, and the linkage and motor mounting bracket.
²Wiper Motor- The wiper motor is secured to
the wiper linkage module bracket on the underside of
the cowl panel within the engine compartment. The
wiper motor output shaft and crank arm extend
through a clearance hole in the mounting bracket,
where they are connected to a crank arm that drives
the wiper linkage.
²Wiper Relay- The wiper relay is located in a
dedicated receptacle on the lower left surface of the
fuse block underneath the steering column behind
the fuse access panel and the steering column open-
ing panel. The wiper relay is a passive component on
vehicles equipped with the optional automatic wiper
system.
²Wiper, Turn Signals, Engine Start Control
Module- The wiper, turn signals and engine start
control module is integral to the fuse block located
underneath the steering column. The fuse block is
concealed behind the fuse access panel and the steer-
ing column opening panel, where it is secured with
screws to the steering column. The wiper system
functions of this module are passive on vehicles
equipped with the optional automatic wiper system.
Hard wired circuitry connects the wiper and
washer system components to the electrical system of
the vehicle. These hard wired circuits are integral to
several wire harnesses, which are routed throughout
the vehicle and retained by many different methods.
These circuits may be connected to each other, to the
vehicle electrical system and to the wiper and washer
system components through the use of a combination
of soldered splices, splice block connectors, and many
different types of wire harness terminal connectors
and insulators. Refer to the appropriate wiring infor-
mation. The wiring information includes wiring dia-
grams, proper wire and connector repair procedures,
further details on wire harness routing and reten-
tion, as well as pin-out and location views for the
various wire harness connectors, splices and grounds.
OPERATION
The wiper and washer system is designed to pro-
vide the vehicle operator with a convenient, safe, and
reliable means of maintaining visibility through the
windshield glass. The various components of this sys-
tem are designed to convert electrical energy pro-
duced by the vehicle electrical system into the
mechanical action of the wiper blades to wipe the
outside surface of the glass, as well as into the
hydraulic action of the washer system to apply
washer fluid stored in an on-board reservoir to the
area of the glass to be wiped. When combined, these
components provide the means to effectively main-
tain clear visibility for the vehicle operator by remov-
ing excess accumulations of rain, snow, bugs, mud, or
VAWIPERS/WASHERS 8R - 3