fuse MERCEDES-BENZ SPRINTER 2006 Workshop Manual

RADIO C1 - BLACKCAV CIRCUIT FUNCTION
A1 20BL/RD/WT VEHICLE SPEED SENSOR OUTPUT
A2 20YL K-TCM/RADIO
A3 18DG/YL/BK CTEL MUTE
A4 16RD/YL FUSED B(+)
A5 16BK RADIO ANTENNA
A6 16GY/DG/RD LAMP DRIVER
A7 16BK/RD FUSED IGNITION SWITCH OUTPUT (ACC-RUN-START)
A8 16BR GROUND
B1 16BR/GY SPEAKER-RIGHT REAR
B2 16WT/GY SPEAKER-RIGHT REAR
B3 18BR/RD SPEAKER-RIGHT FRONT (+)
B4 18BK SPEAKER-RIGHT FRONT (-)
B5 18BR/DG SPEAKER-LEFT FRONT (+)
B6 18BR SPEAKER-LEFT FRONT (-)
B7 16BR/BL SPEAKER-LEFT REAR
B8 16WT/BL SPEAKER-LEFT REAR
RADIO C2CAV CIRCUIT FUNCTION
1 16BK RADIO ANTENNA W/SHIELD
2 16BK SHIELD
RECIRCULATED AIR SOLENOID VALVECAV CIRCUIT FUNCTION
1 16RD RECIRCULATED AIR SOLENOID VALVE CONTROL
2 16BK GROUND
REFRIGERANT PRESSURE SENSORCAV CIRCUIT FUNCTION
1 18BR/BL SENSOR GROUND
2 20BR/RD REFRIGERANT PRESSURE SENSOR FEEDBACK
3 20RD/BL 5 VOLT SUPPLY
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CONNECTOR PINOUTS

A/C AUXILIARY FAN RELAY (RELAY BLOCK)CAV CIRCUIT FUNCTION
30 14BL/YL FUSED B(+)
85 18BR GROUND
86 18BK/RD A/C AUXILIARY FAN RELAY CONTROL
87 14DG/BK A/C AUXILIARY FAN RELAY OUTPUT
87A --
CIRCULATION PUMP RELAY-CABIN HEATER MODULE (RELAY BLOCK)CAV CIRCUIT FUNCTION
30 18DG/BK CIRCULATION PUMP RELAY OUTPUT
85 16BR GROUND
86 16BL/YL CIRCULATION PUMP RELAY HIGH SIDE CONTROL
87 16RD/BL FUSED B(+)
87A 16BK/YL FUSED IGNITION SWITCH OUTPUT (RUN-START)
D+ RELAY NO. 2 (RELAY BLOCK)CAV CIRCUIT FUNCTION
30 14RD FUSED B(+)
85 16RD/BK FUSED D(+) RELAY NO. 1 OUTPUT
86 16BR GROUND
87 14BL/YL D(+) RELAY NO. 2 OUTPUT
87A --
FAN STAGE 1 RELAY (RELAY BLOCK)CAV CIRCUIT FUNCTION
30 14BK/VT FAN STAGE 1 RELAY OUTPUT
85 16BR GROUND
86 16BL/YL FAN STAGE 1 RELAY HIGH SIDE CONTROL
87 16RD/WT FUSED B(+)
87A --
OPTIONAL EQUIPMENT RELAY (RELAY BLOCK)CAV CIRCUIT FUNCTION
30 10RD FUSED B(+)
85 16BR GROUND
86 16BK/YL FUSED IGNITION SWITCH OUTPUT (RUN-START)
87 10BK OPTIONAL EQUIPMENT RELAY OUTPUT
87A --
REMOTE KEYLESS ENTRY ANTENNACAV CIRCUIT FUNCTION
1 20BR RKE ANTENNA
3 - GROUND
SEAT BELT SWITCHCAV CIRCUIT FUNCTION
1 16BR GROUND
2 20YL/RD SEAT BELT SWITCH SIGNAL
3- -
4- -
5- -
6- -
7- -
8- -
9- -
10 - -
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CONNECTOR PINOUTS

SEAT BELT TENSIONER-DRIVER - YELLOWCAV CIRCUIT FUNCTION
1 20BL DRIVER SEAT BELT TENSIONER LINE 2
2 20BR/YL DRIVER SEAT BELT TENSIONER LINE 1
SEAT BELT TENSIONER-PASSENGER - YELLOWCAV CIRCUIT FUNCTION
1 20BL PASSENGER SEAT BELT TENSIONER LINE 2
2 20BR PASSENGER SEAT BELT TENSIONER LINE 1
SECURITY SYSTEM MODULE C1 - BROWNCAV CIRCUIT FUNCTION
1 16BK/WT LEFT TURN SIGNAL
2- -
3- -
4 16BK/DG RIGHT TURN SIGNAL
5 16BK/VT FAN STAGE 1 RELAY
6 16WT/RD WARM AIR AUXILIARY HEATER CONTROL
7 16RD/GY FUSED B(+)
8 16BK/GY FUSED OPTIONAL EQUIPMENT RELAY OUTPUT
9 18VT/DG TOWING/INTRUSION SENSOR INDICATOR DRIVER
10 - -
11 16BR/YL FRONT COURTESY LAMPS CONTROL
12 16BR/WT DOOR AJAR SWITCH SENSE
13 16RD/DG FUSED B(+)
14 16BK/BL HOOD AJAR SWITCH SENSE
15 18GY/WT PANIC SWITCH SENSE
16 16BR GROUND
17 18GY/BR TOWING SENSOR SWITCH SENSE
18 18GY/YL INTRUSION SENSOR SWITCH SENSE
19 - -
20 16BK DRIVER CYLINDER UNLOCK SENSE
21 16RD DRIVER CYLINDER LOCK SENSEC
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CONNECTOR PINOUTS

SECURITY SYSTEM MODULE C2 - LT. GREENCAV CIRCUIT FUNCTION
1 16DG/YL INTRUSION SENSOR INTERFACE
2 16GY/BL WINDOW DEFOGGER-LEFT REAR OUTPUT
3 16GY WINDOW DEFOGGER RELAY-RIGHT REAR OUTPUT
4 20DG/BK INTRUSION SENSOR 1 SIGNAL
5- -
6- -
7 20GY/BK INTRUSION SENSOR 2 SIGNAL
8 16GY/DG K-CTM/SSM
9 18BK/BL SIREN SIGNAL CONTROL
10 20DG/WT/BL INTRUSION SENSOR 3 SIGNAL
11 16WT/BL RKE INTERFACE
12 16WT/BL/RD SECURITY SYSTEM INTERFACE
SENTRY KEY REMOTE ENTRY MODULE (SKREEM)CAV CIRCUIT FUNCTION
1 18YL RKE ANTENNA
2 16BR GROUND
3 16RD/YL FUSED B(+)
4 16BK/WT LEFT TURN SIGNAL
5 20DG/WT CAN C BUS (+)
6 20DG CAN C BUS (-)
7 16BK/YL FUSED IGNITION SWITCH OUTPUT (RUN-START)
8 20WT/DG K-SKREEM
9 16WT/BL/RD (EXCEPT
VTSS)RKE INTERFACE
9 16WT/BL/RD (VTSS) SECURITY SYSTEM INTERFACE
10 18DG/YL TURN SIGNAL/ANTI-THEFT ALARM RELAY-LEFT/RIGHT CONTROL
11 20BR TRANSPONDER COIL (+)
12 - TRANSPONDER COIL (-)
SHIFTER ASSEMBLY - BLACKCAV CIRCUIT FUNCTION
1- -
2 20GY/DG/RD LAMP DRIVER
3 20BL/DG K-ABS/SHIFTER ASSEMBLY
4 18BR GROUND
5 20BK/BL/RD BRAKE LAMP SWITCH
6 20DG/WT CAN C BUS (+)
7 20DG CAN C BUS (-)
8 18BK/DG TRANSMISSION RELAY OUTPUT
9 16WT/BL/RD FUSED IGNITION SWITCH OUTPUT (RUN-START)
10 16WT/RD BACK-UP LAMP
SIREN - BLACKCAV CIRCUIT FUNCTION
1 18RD/DG FUSED B(+)
2 18BR GROUND
3 18BK/BL SIREN SIGNAL CONTROL
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CONNECTOR PINOUTS

STEERING ANGLE SENSORCAV CIRCUIT FUNCTION
1 20DG/WT CAN C BUS (-)
2- -
3 20DG CAN C BUS (+)
4- -
5 20BK/RD FUSED OPTIONAL EQUIPMENT RELAY OUTPUT
6 20BR GROUND
TOWING/INTRUSION SENSOR ON/OFF SWITCHCAV CIRCUIT FUNCTION
1 18GY/DG/RD LAMP DRIVER
2- -
3 18GY/YL INTRUSION SENSOR SWITCH SENSE
4 18BR GROUND
5- -
6- -
7- -
8 18GY/BR TOWING SENSOR SWITCH SENSE
9 18VT/DG TOWING/INTRUSION SENSOR INDICATOR DRIVER
10 18BR GROUND
TRANSMISSION CONTROL MODULE C1 - BLACKCAV CIRCUIT FUNCTION
1 20BL K-TCM/RADIO
2- -
3- -
4- -
5- -
6- -
7- -
8- -
9- -
10 - -
23 - -
24 - -
25 - -
26 - -
27 - -
28 - -
29 16BK/DG TRANSMISSION RELAY OUTPUT
30 18BR GROUND
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CONNECTOR PINOUTS

²Four Wheel Speed Sensors/Tone Wheel assem-
blies
²ABS warning indicator
²TCS (ASR) event indicator
²TCS (ASR) warning indicator
²Steering Angle Sensor
²Lateral Acceleration/Yaw Rate Sensor
²Brake Pressure Sensor
²ESP event indicator
²Brake Fluid Level switch
²Brake Switch (BS)
²Brake Lamp Switch (BLS)
²TCS Switch (TCSS)
²K - ABS
²CAN C Bus
²Fuses, grounds, and wiring
3.7.1 ABS AND TCS (ASR) INDICATORS
This system is equipped with an ABS warning
indicator, TCS (ASR) warning indicator, and TCS
(ASR) event indicator to alert the driver of a
malfunction/event it has detected. The CAB can
request the illumination of the ABS warning indi-
cator, TCS (ASR) warning indicator, and TCS (ASR)
event indicator via CAN C BUS. The CAB controls
the ABS warning indicator by:
²Light steady during an initial test at the begin-
ning of an ignition cycle to function as a bulb
check
²Light steady when a system malfunction exists
(DTC)
²Light steady - If you have not met the speed
required to reset/retest the ABS components
The Instrument Cluster (IC) controls the indica-
tors. The Instrument Cluster transmits a message
over the CAN C Bus relating to diagnostics and
current lamp status for the ABS and TCS (ASR)
indicators. The CAB can control the operation of
TCS warning and TCS event indicators by:
²Both light steady with engine off and both go out
with engine running
²TCS warning indicator lights steady when a TCS
malfunction exists
²TCS event indicator will flash when TCS is in an
active event
3.7.2 CONTROLLER ANTILOCK BRAKE
(CAB)
The CAB is mounted directly to the Hydraulic
Control Unit (HCU) that includes a microprocessor
and twelve solenoids that control valves that con-trol brake pressure during antilock braking or trac-
tion control events. The CAB also has circuits that
monitor the following:
²Double brake switch outputs are monitored to
determine whether or not to prepare for possible
ABS braking
²Wheel Speed Sensors are monitored to determine
when a wheel is tending to lock up. The CAB will
operate the valves in the HCU to control braking
pressure during ABS braking
²Detect ABS system related problems and take
diagnostic action
²Able to execute self-tests and output control com-
mands
When equipped with Electronic Stability (ESP),
the CAB also monitors the following:
²The ESP looks at the Steering Angle Sensor value
and monitors the speed of the inner and outer
wheels to ensure that the values are plausible.
The Steering Angle Sensor also monitors the
speed that the steering wheel is turned.
²The Lateral Acceleration/Yaw Rate Sensor is con-
tained in one unit. The sensor measures side to
side (lateral) motion and rotational motion (how
fast the vehicle is turning).
²The ESP uses data from the Brake Pressure
Sensor to analyze how hard and fast that the
driver wants to brake.
3.7.3 HYDRAULIC CONTROL UNIT (HCU)
The HCU on the Bosch 5.7 has an integral valve
body for controlling the front and rear brakes.
Within the HCU are inlet, outlet, and shuttle
valves, to release brake pressure as required to
avoid wheel lockup, keeping the wheels rolling, and
maintain optimum deceleration with stability. The
Pump Motor is attached to the HCU which works
with the ABS and TCS and is controlled by the
CAB. The primary function is to provide extra
amount of fluid when needed.
3.7.4 SWITCHES/SENSORS
BRAKE SWITCH (BS):This switch prepares the
CAB for a possible antilock event. The CAB uses an
output state voltage from the BS when the brake
pedal is either released/depressed. The Fused Igni-
tion Switch Output circuit supplies 12 volts to the
BS. A released brake pedal will close the BS circuit
and the BS Output circuit supplies 12 volts to the
CAB. When the driver depresses the brake pedal,
the BS Output circuit voltage drops to 0 volts and
the CAB senses the brake pedal state. This tells the
CAB what position the brake pedal is currently in to
make an ABS event possible. When using the
DRBIIItin Inputs/Outputs, the BS and BLS will
3
GENERAL INFORMATION

read opposite switch states.Note: The BS and
BLS are in the same switch housing.
BRAKE LAMP SWITCH (BLS):This switch pre-
pares the CAB for a possible antilock event. The
CAB uses an output state voltage from the BLS
when the brake pedal is either depressed/released.
The Fused Ignition Switch Output circuit supplies
12 volts to the BLS. A depressed brake pedal will
close the BLS circuit and the BLS Output circuit
supplies 12 volts at the CAB. When the driver
releases the brake pedal, the BLS Output circuit
voltage drops to 0 volts and the CAB senses the
brake pedal state. This tells the CAB what position
the brake pedal is currently in to make an ABS
event possible. When using the DRBIIItin Inputs/
Outputs, the BS and BLS will read opposite switch
states.Note: The BS and BLS are in the same
switch housing.
TRACTION CONTROL SYSTEM SWITCH
(TCSS):This switch signals the CAB to either turn
ON or OFF the TCS. The driver can toggle the
TCSS, which receives 12 volts from the D (+) Relay
Output circuit. Depending on the position of the
TCSS, open or closed, the CAB receives the TCSS
state voltage on the TCS Switch Sense circuit.
When 12 volts are applied to the TCS Switch Sense
circuit, the TCS is OFF. When no voltage is present,
the TCS is ON.
WHEEL SPEED SENSORS AND TONE
WHEELS:The Bosch 5.7 system uses one passive
WSS on each wheel. The sensor measures the wheel
speed by monitoring a rotating tone wheel. As the
teeth of the tone wheel move through the magnetic
field of the sensor an AC voltage and amperage is
generated. This signal frequency increases or de-
creases proportionally to the speed of the wheel.
The CAB monitors this signal to check for a sudden
change in single or multiple wheel decelerations. If
the deceleration of one or more wheels is not within
a predetermined amount, the CAB takes control for
antilock action through the HCU. Each WSS has a
magnetic inductive pick up coil (WSS) that is
mounted to a fixed component. There is an air gap
between the tone wheel and the speed sensor as-
sembly. Diagnostically, the coils of the Wheel Speed
Sensors have the same amount of resistance. When
measured across the CAB harness connector termi-
nals, the resistance should be between 1100 - 1800
ohms. Refer to service manual for WSS replacement
and air gap specifications.
Correct ABS operation is dependent on Tone
Wheel speed signal from the WSS. The vehicle
wheels and tires should all be the same size and
type to get accurate signals. In addition, all tires
should be at recommended tire pressures.3.7.5 SELF TESTS
The system software includes several self tests
that are performed every time the ignition is turned
on and the vehicle is driven. Some of the self tests
occur immediately, while others occur under normal
driving conditions while not in antilock operation.
The CAB checks continuously for a missing or
erratic WSS signals/circuits, tone wheels, solenoids,
pump motor or solenoid relay by performing several
tests such as: dynamic, static, ohmic, voltage drop,
and timed response. If any component exhibits a
fault during testing, the CAB will request to illumi-
nate the ABS and TCS warning indicators.
As an additional check of the ESP system, a road
test procedure is available on the DRBIIIt. This
test should be carried out when any ESP component
is replaced in order to ensure proper function. Since
the wheel speed sensors are required inputs to the
ESP, this test should also be performed if the wheel
speed sensors are replaced.
First, the brakes are applied with the vehicle
stationary. Then, the vehicle is driven at approxi-
mately 6 MPH. The driver has to make left and
right turns, with a minimum 90 degree steering
turning angle. If the indicator lamp goes out, every-
thing is in order. If the lamp remains illuminated,
the DRBIIItwill display the fault codes that are
causing the test to fail. The road test function is set
in the ESP control module, and can only be deacti-
vated once there are no more fault codes detected.
The Steering Angle Sensor must be initialized. A
procedure is carried out using the DRBIIItto
ensure that the module detects the exact position of
the sensor. The sensor must be calibrated any time
wheel alignment is changed, the steering column is
removed and re-installed, or the sensor is replaced.
3.8 USING THE DRBIIIT
Refer to the DRBIIItuser 's guide for instructions
and assistance with reading diagnostic trouble
codes, erasing diagnostic trouble codes and other
DRBIIItfunctions.
3.9 DRBIIITERROR MESSAGES
Under normal operation, the DRBIIItwill dis-
play one of only two error messages:
Ð User-Requested WARM Boot or User-Requested
COLD Boot.
If the DRBIIItshould display any other error
message, record the entire display and call the
STAR Center for information and assistance. This
is a sample of such an error message display:
4
GENERAL INFORMATION

4.2.4 DRBIIITSAFETY INFORMATION
WARNING: EXCEEDING THE LIMITS OF THE
DRBIIITMULTIMETER IS DANGEROUS. IT
CAN EXPOSE YOU TO SERIOUS OR
POSSIBLE FATAL INJURY. CAREFULLY
READ AND UNDERSTAND THE CAUTIONS
AND THE SPECIFICATION LIMITS.
²Follow the vehicle manufacturer 's service speci-
fications at all times.
²Do not use the DRBIIItif it has been damaged.
²Do not use the test leads if the insulation is
damaged or if metal is exposed.
²To avoid electrical shock, do not touch the test
leads, tips, or the circuit being tested.
²Choose the proper range and function for the
measurement. Do not try voltage or current mea-
surements that may exceed the rated capacity.
²Do not exceed the limits shown in the table below:
FUNCTION INPUT LIMIT
Volts 0 - 500 peak volts AC
0 - 500 volts DC
Ohms (resistance)* 0 - 1.12 megaohms
Frequency Measured
Frequency Generated0-10kHz
Temperature -58 - +1100ÉF
-50 - +600ÉC
* Ohms cannot be measured if voltage is present.
Ohms can be measured only in a non-powered
circuit.
± Voltage between any terminal and ground
must not exceed 500v DC or 500v peak AC.
± Use caution when measuring voltage above
25v DC or 25v AC.
± Use the low current shunt to measure circuits
up to 10A. Use the high current clamp to
measure circuits exceeding 10A.
± When testing for the presence of voltage or
current, make sure the meter is functioning
correctly. Take a reading of a known voltage or
current before accepting a zero reading.
± When measuring current, connect the meter in
series with test load.
± When using the meter function, keep the
DRBIIItaway from spark plug or coil wires to
avoid measuring error from outside interfer-
ence.
4.3 WARNING
4.3.1 VEHICLE DAMAGE WARNINGS
Before disconnecting any control module, make
sure the ignition is ``off ''. Failure to do so could
damage the module.
When testing voltage or continuity at any control
module, use the terminal side (not the wire end) of
the connector. Do not probe a wire through the
insulation; this will damage it and eventually cause
it to fail because of corrosion.
Be careful when performing electrical tests so as
to prevent accidental shorting of terminals. Such
mistakes can damage fuses or components. Also, a
second code could be set, making diagnosis of the
original problem more difficult.
4.3.2 ROAD TESTING A COMPLAINT
VEHICLE
Some complaints will require a test drive as part
of the repair verification procedure. The purpose of
the test drive is to try to duplicate the diagnostic
code or symptom condition.
CAUTION: Before road testing a vehicle, be
sure that all components are reassembled.
During the test drive, do not try to read the
DRBIIITscreen while in motion. Do not hang
the DRBIIITfrom the rear view mirror or
operate it yourself. Have an assistant
available to operate the DRBIIIT.
4.4 DIAGNOSIS
1. Your diagnostic test procedure must begin with a
thorough visual inspection of the system in ques-
tion for damaged components or disconnected
connectors. For ABS, the brake lamps must be
operational prior to continuing.
2. Connect the DRBIIItto the data link connector
located under the dash. If the DRBIIItdoes not
power up, check the power and ground supplies
to the connector.
3. Select the system in question. Turn the ignition
on. If the DRBIIItdisplays ``No Responseº, refer
to Communication in the Body Diagnostic Pro-
cedures manual to diagnose the symptom.
4. Read and record all diagnostic trouble codes. If
any additional codes are present, proceed to the
appropriate test.
5. For ABS, if there are no diagnostic trouble codes
present, select ``Inputs/Outputs'' and read the
Brake Switch and Brake Lamp Switch inputs as
you press and release the brake pedal. If the
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GENERAL INFORMATION

Symptom List:
ANTI-LOCK BRAKE MODULE INTERNAL
CAB INTERNAL
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be ANTI-LOCK BRAKE MODULE
INTERNAL.
When Monitored and Set Condition:
ANTI-LOCK BRAKE MODULE INTERNAL
When Monitored: Ignition On - Continuously.
Set Condition: When there is a deviation from the expected result of a CAB internal self
check.
CAB INTERNAL
When Monitored: Ignition On - Continuously.
Set Condition: When there is a deviation from the expected result of a CAB internal self
check.
POSSIBLE CAUSES
INTERMITTENT CAB INTERNAL DTC
DAMAGED CAB/CAB HARNESS CONNECTOR
FUSED OPTIONAL EQUIPMENT RELAY OUTPUT CIRCUIT OPEN
FUSED B(+) CIRCUIT OPEN
GROUND CIRCUIT OPEN
ANTI-LOCK BRAKE CONTROLLER
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, read DTCs.
With the DRBIIIt, erase DTCs.
Turn the ignition off.
Turn the ignition on.
With the DRBIIIt, read DTCs.
Does this DTC reset?All
Ye s!Go To 2
No!Go To 6
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BRAKES (CAB)

TEST ACTION APPLICABILITY
2 Turn the ignition off.
Disconnect the CAB harness connector.
Inspect the CAB/CAB harness connector for damage.
Is there any broken, bent, pushed out, corroded or spread terminals?All
Ye s!Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 3
3 Turn the ignition off.
Disconnect the CAB harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Fused Optional Equipment
Relay Output circuit at the CAB harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?All
Ye s!Go To 4
No!Repair the Fused Optional Equipment Relay Output circuit for an
open.
Perform ABS VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Disconnect the CAB harness connector.
Using a 12-volt test light connected to ground, check both Fused B(+) circuits at the
CAB harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?All
Ye s!Go To 5
No!Repair the Fused B(+) circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
5 Turn the ignition off.
Disconnect the CAB harness connector.
Using a 12-volt test light connected to 12-volts, check the CAB harness connector
Ground circuits.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?All
Ye s!Replace the Controller Antilock Brake in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
No!Repair the Ground circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
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BRAKES (CAB)
ANTI-LOCK BRAKE MODULE INTERNAL ÐContinued