fuse MERCEDES-BENZ SPRINTER 2006 User Guide

Symptom:
BLOWER STAGE 1 HIGH OR OPEN (ACTIVE)
POSSIBLE CAUSES
BLOWER MOTOR
BLOWER MOTOR DRIVER CIRCUIT(S) SHORTED TO VOLTAGE
BLOWER MOTOR DRIVER CIRCUIT(S) OPEN
BLOWER MOTOR RESISTOR BLOCK
AUTOMATIC TEMPERATURE CONTROL (ATC)
TEST ACTION APPLICABILITY
1 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Blower Motor harness connector.
Connect a fused jumper wire between Battery (+) and Blower Motor cavity 1.
Connect a jumper wire between ground and Blower Motor cavity 2.
Does the Blower Motor run at full speed?All
Ye s!Go To 2
No!Replace the Blower Motor in accordance with the Service Infor-
mation.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Blower Motor Resistor Block harness connector.
Disconnect the Blower Motor harness connector.
Disconnect the Automatic Temperature Control (ATC) C2 harness connector.
Turn the ignition on.
Measure the voltage of each of the Blower Motor Driver circuits (Low, M1, M2, High).
Is the voltage above 0.2 volts on any of the circuits?All
Ye s!Repair each circuit with voltage above 0.2 volts for a short to
voltage.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 3
3 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Automatic Temperature Control (ATC) C2 harness connector.
Disconnect the Blower Motor Resistor Block harness connector.
Disconnect the Blower Motor harness connector.
Measure the resistance of the Blower Motor Driver circuits (Low, M1, M2, High)
between the Automatic Temperature Control (ATC) C2 harness connector and the
Blower Motor Resistor Block harness connector.
Measure the resistance of the Blower Motor High Driver circuit between the
Automatic Temperature Control (ATC) C2 harness connector and the Blower Motor
harness connector.
Is the resistance below 5.0 ohms on each of the circuits?All
Ye s!Go To 4
No!Repair each circuit with a resistance above 5.0 ohms for an open.
Perform BODY VERIFICATION TEST - VER 1.
144
HEATING & A/C

Symptom:
BLOWER STAGE 1 SHORTED LOW (ACTIVE)
POSSIBLE CAUSES
BLOWER MOTOR FUSE
BLOWER MOTOR
BLOWER MOTOR DRIVER CIRCUIT(S) SHORTED TO GROUND
FUSED B+ CIRCUIT SHORTED TO GROUND
BLOWER MOTOR RESISTOR BLOCK
AUTOMATIC TEMPERATURE CONTROL (ATC)
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Remove and inspect the Blower Motor Fuse, and replace it if necessary.
NOTE: All of the following criteria must be met in order to successfully run
the ATC Function Test.
Place the shift lever in Park.
Turn the ignition on.
With the DRBIIIt, record and erase ATC DTC's.
Start the engine. Allow the engine to reach normal operating temperature.
Set the blower to high speed.
Press the Air Conditioning switch On.
With the DRBIIIt, verify that the ambient temperature is above 59ÉF (15ÉC), the
refrigerant pressure is between 29 and 348 PSI (2 and 24 bar), the evaporator
temperature is above 36.5ÉF (2.5ÉC), and the coolant temperature is above 158ÉF
(70ÉC).
With the DRBIIItin Automatic Temperature Control (ATC), select System Tests and
select ATC Function Test. When the ATC Function Test is complete, proceed as
follows:
With the DRBIIIt, read the active ATC DTCs.
Does the DRBIIItdisplay: BLOWER STAGE ONE SHORTED LOW?All
Ye s!Go To 2
No!Refer to the wiring diagrams located in the service information to
help isolate a possible intermittent short to ground condition.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
Disconnect the Blower Motor harness connector.
Connect a fused jumper wire between Battery (+) and Blower Motor cavity 1.
Connect a jumper wire between ground and Blower Motor cavity 2.
Does the Blower Motor run at full speed?All
Ye s!Go To 3
No!Replace the Blower Motor in accordance with the Service Infor-
mation. Remove and inspect the Blower Motor Fuse, and replace
it if necessary.
Perform BODY VERIFICATION TEST - VER 1.
146
HEATING & A/C

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Blower Motor Resistor harness connector.
Disconnect the Blower Motor harness connector.
Disconnect the Automatic Temperature Control (ATC) C2 harness connector.
Measure the resistance between ground and each of the Blower Motor Driver circuits
(Low, M1, M2, High).
Is the resistance below 10k ohms on any of the circuits?All
Ye s!Repair each circuit with a resistance below 10k ohms for a short
to ground. Remove and inspect the Blower Motor Fuse, and
replace it if necessary.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 4
4 Turn the ignition off.
Remove the Blower Motor Fuse.
Disconnect the Automatic Temperature Control (ATC) C2 harness connector.
Measure the resistance between ground and the Fused B+ circuit.
Is the resistance below 10k ohms?All
Ye s!Repair the Fused B+ circuit for a short to Ground. Remove and
inspect the Blower Motor Fuse, and replace it if necessary.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 5
5 Turn the ignition off.
Disconnect the Blower Motor Resistor Block harness connector.
Measure the resistance between Blower Motor Resistor Block cavity 2 and cavity 1.
The approximate resistance should be 1.4 ohms.
Measure the resistance between Blower Motor Resistor Block cavity 2 and cavity 3.
The approximate resistance should be 0.8 ohms.
Measure the resistance between Blower Motor Resistor Block cavity 2 and cavity 4.
The approximate resistance should be 1.6 ohms.
Is the resistance as specified for each circuit?All
Ye s!Replace the Automatic Temperature Control (ATC) in accordance
with the Service Information. Remove and inspect the Blower
Motor Fuse, and replace it if necessary.
Perform BODY VERIFICATION TEST - VER 1.
No!Replace the Blower Motor Resistor Block in accordance with the
Service Information. Remove and inspect the Blower Motor Fuse,
and replace it if necessary.
Perform BODY VERIFICATION TEST - VER 1.
147
HEATING & A/C
BLOWER STAGE 1 SHORTED LOW (ACTIVE) ÐContinued

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect the Circulation Pump harness connector.
Connect a fused jumper wire between the Battery (+) and Circulation Pump cavity 2.
Connect a jumper wire between ground and Circulation Pump cavity 1.
Does the Circulation Pump run?All
Ye s!Replace the Automatic Temperature Control (ATC) in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No!Replace the Circulation Pump in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
155
HEATING & A/C
CIRC PUMP CONTROL SHORTED LOW (ACTIVE) ÐContinued

Symptom:
UNKNOWN TROUBLE CODE UNKNOWN DTC TYPE 2
When Monitored and Set Condition:
UNKNOWN TROUBLE CODE UNKNOWN DTC TYPE 2
When Monitored: Whenever the battery voltage is above 10.0 volts and the module is
connected.
Set Condition: The SKREEM has detected a code but is confused as to which one it is.
POSSIBLE CAUSES
DTC PRESENT
SKREEM SHORTED
TEST ACTION APPLICABILITY
1 With the DRBIIIt, record and erase DTC's.
Cycle the ignition switch from ON to OFF to ON.
With the DRBIIIt, read DTC's.
Turn the ignition off and remove the key.
Using the RKE transmitter, operate the Door Locks several times while observing the
DRBIIIt.
Wait 10 seconds.
Does the DRBIIItdisplay UNKNOWN TROUBLE CODE UNKNOWN TYPE 2?All
Ye s!Replace the Sentry Key RemotE Entry Module.
Perform BODY VERIFICATION TEST - VER 1.
No!The conditions that caused this code to set are not present at this
time. Using the RKE transmitter, operate the door locks several
times and re-check for any DTC's.
Perform BODY VERIFICATION TEST - VER 1.
209
POWER DOOR LOCKS/RKE

Symptom:
INTRUSION SENSOR 1 CIRCUIT OPEN/SHORT TO GROUND
When Monitored and Set Condition:
INTRUSION SENSOR 1 CIRCUIT OPEN/SHORT TO GROUND
When Monitored: Whenever the battery voltage is above 10.0 volts and the Security
System Module is connected.
Set Condition: The Security System Module detects the incorrect voltage on the Intrusion
Sensor circuit.
POSSIBLE CAUSES
DTC PRESENT
FUSE 2 IN FUSE BLOCK 3
FUSED B(+) WIRE OPEN
GROUND CIRCUIT OPEN
INTRUSION SENSOR 1 SIGNAL SHORTED
INTRUSION SENSOR 1 SIGNAL CIRCUIT OPEN
INTRUSION SENSOR INTERFACE WIRE SHORTED
INTRUSION SENSOR INTERFACE WIRE OPEN
INTRUSION SENSOR
TEST ACTION APPLICABILITY
1 With the DRBIIIt, record and erase DTC's.
Remove the ignition key.
Close and lock all doors and set the Vehicle Theft Security System.
Wait 1 minute.
Disarm the Vehicle Theft System.
With the DRBIIIt, read DTC's.
Does the DRBIIItdisplay the same DTC?All
Ye s!Go To 2
No!Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.
2 Check Fuse 2 in Fuse Block 3.
Is the fuse open?All
Ye s!Check for a short to ground and replace the fuse.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 3
220
VEHICLE THEFT/SECURITY

TEST ACTION APPLICABILITY
3 Disconnect the Intrusion Sensor No. 1 connector.
Measure the voltage of the Fused B(+) circuit.
Is the voltage above 10.0 volts?All
Ye s!Go To 4
No!Repair the Fused B(+) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4 Disconnect the Intrusion Sensor No. 1 connector.
Measure the resistance of the Ground circuit at the Intrusion Sensor connector.
Is the resistance below 5.0 ohms?All
Ye s!Go To 5
No!Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
5 Turn the ignition off.
Disconnect the Security System Module C2 connector.
Disconnect the Intrusion Sensor No. 1 connector.
Measure the resistance between ground and the Intrusion Sensor 1 Signal circuit.
Is the resistance below 5.0 ohms?All
Ye s!Repair the Intrusion Sensor 1 Signal wire for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 6
6 Disconnect the Intrusion Sensor No. 1 connector.
Disconnect the Security System Module C2 connector.
Measure the resistance of the Intrusion Sensor 1 Signal circuit between the SSM C2
connector and the Intrusion Sensor No 1 connector.
Is the resistance below 5.0 ohms?All
Ye s!Go To 7
No!Repair the Intrusion Sensor 1 Signal wire for an open.
Perform BODY VERIFICATION TEST - VER 1.
7 Disconnect the Intrusion Sensor No. 1 connector.
Disconnect the Security System Module C2 connector.
Measure the resistance between ground and the Intrusion Sensor Interface circuit.
Is the resistance below 5.0 ohms?All
Ye s!Repair the Intrusion Sensor Interface circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 8
8 Disconnect the Intrusion Sensor No. 1 connector.
Disconnect the Security System Module C2 connector.
Measure the resistance of the Intrusion Sensor Interface circuit between the SSM C2
connector and the Intrusion Sensor No. 1 connector.
Is the resistance below 5.0 ohms?All
Ye s!Replace the Intrusion Sensor.
Perform BODY VERIFICATION TEST - VER 1.
No!Repair the Intrusion Sensor Interface circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
221
VEHICLE THEFT/SECURITY
INTRUSION SENSOR 1 CIRCUIT OPEN/SHORT TO GROUND ÐContinued

Symptom:
INTRUSION SENSOR 2 CIRCUIT OPEN/SHORT TO GROUND
When Monitored and Set Condition:
INTRUSION SENSOR 2 CIRCUIT OPEN/SHORT TO GROUND
When Monitored: Whenever the battery voltage is above 10.0 volts and the Security
System Module is connected.
Set Condition: The Security System Module detects the incorrect voltage on the Intrusion
Sensor circuit.
POSSIBLE CAUSES
DTC PRESENT
FUSE 2 IN FUSE BLOCK 3
FUSED B(+) WIRE OPEN
GROUND CIRCUIT OPEN
INTRUSION SENSOR 2 SIGNAL SHORTED
INTRUSION SENSOR 2 SIGNAL CIRCUIT OPEN
INTRUSION SENSOR INTERFACE WIRE SHORTED
INTRUSION SENSOR INTERFACE WIRE OPEN
INTRUSION SENSOR
TEST ACTION APPLICABILITY
1 With the DRBIIIt, record and erase DTC's.
Remove the ignition key.
Close and lock all doors and set the Vehicle Theft Security System.
Wait 1 minute.
Disarm the Vehicle Theft System.
With the DRBIIIt, read DTC's.
Does the DRBIIItdisplay the same DTC?All
Ye s!Go To 2
No!Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.
2 Check Fuse 2 in Fuse Block 3.
Is the fuse open?All
Ye s!Check for a short to ground and replace the fuse.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 3
223
VEHICLE THEFT/SECURITY

TEST ACTION APPLICABILITY
3 Disconnect the Intrusion Sensor No. 2 connector.
Measure the voltage of the Fused B(+) circuit.
Is the voltage above 10.0 volts?All
Ye s!Go To 4
No!Repair the Fused B(+) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4 Disconnect the Intrusion Sensor No. 2 connector.
Measure the resistance of the Ground circuit at the Intrusion Sensor connector.
Is the resistance below 5.0 ohms?All
Ye s!Go To 5
No!Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
5 Turn the ignition off.
Disconnect the Security System Module C2 connector.
Disconnect the Intrusion Sensor No. 2 connector.
Measure the resistance between ground and the Intrusion Sensor 2 Signal circuit.
Is the resistance below 5.0 ohms?All
Ye s!Repair the Intrusion Sensor 2 Signal wire for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 6
6 Disconnect the Intrusion Sensor No. 2 connector.
Disconnect the Security System Module C2 connector.
Measure the resistance of the Intrusion Sensor 2 Signal circuit between the SSM C2
connector and the Intrusion Sensor No 2 connector.
Is the resistance below 5.0 ohms?All
Ye s!Go To 7
No!Repair the Intrusion Sensor 2 Signal wire for an open.
Perform BODY VERIFICATION TEST - VER 1.
7 Disconnect the Intrusion Sensor No. 2 connector.
Disconnect the Security System Module C2 connector.
Measure the resistance between ground and the Intrusion Sensor Interface circuit.
Is the resistance below 5.0 ohms?All
Ye s!Repair the Intrusion Sensor Interface circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 8
8 Disconnect the Intrusion Sensor No. 2 connector.
Disconnect the Security System Module C2 connector.
Measure the resistance of the Intrusion Sensor Interface circuit between the SSM C2
connector and the Intrusion Sensor No. 2 connector.
Is the resistance below 5.0 ohms?All
Ye s!Replace the Intrusion Sensor.
Perform BODY VERIFICATION TEST - VER 1.
No!Repair the Intrusion Sensor Interface circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
224
VEHICLE THEFT/SECURITY
INTRUSION SENSOR 2 CIRCUIT OPEN/SHORT TO GROUND ÐContinued

Symptom:
INTRUSION SENSOR 3 CIRCUIT OPEN/SHORT TO GROUND
When Monitored and Set Condition:
INTRUSION SENSOR 3 CIRCUIT OPEN/SHORT TO GROUND
When Monitored: Whenever the battery voltage is above 10.0 volts and the Security
System Module is connected.
Set Condition: The Security System Module detects the incorrect voltage on the Intrusion
Sensor circuit.
POSSIBLE CAUSES
DTC PRESENT
FUSE 2 IN FUSE BLOCK 3
FUSED B(+) WIRE OPEN
GROUND CIRCUIT OPEN
INTRUSION SENSOR 3 SIGNAL SHORTED
INTRUSION SENSOR 3 SIGNAL CIRCUIT OPEN
INTRUSION SENSOR INTERFACE WIRE SHORTED
INTRUSION SENSOR INTERFACE WIRE OPEN
INTRUSION SENSOR
TEST ACTION APPLICABILITY
1 With the DRBIIIt, record and erase DTC's.
Remove the ignition key.
Close and lock all doors and set the Vehicle Theft Security System.
Wait 1 minute.
Disarm the Vehicle Theft System.
With the DRBIIIt, read DTC's.
Does the DRBIIItdisplay the same DTC?All
Ye s!Go To 2
No!Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.
2 Check Fuse 2 in Fuse Block 3.
Is the fuse open?All
Ye s!Check for a short to ground and replace the fuse.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 3
226
VEHICLE THEFT/SECURITY