2006 MERCEDES-BENZ SPRINTER brakes

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Lateral Acceleration Sensor harness connector.
Disconnect the CAB harness connector.
Turn the ignition on.
Measure the voltage on all 4 of the Lateral Acceleration Sensor signal circuits.
Measure the voltage of the Lateral Acceleration Sensor ground circuit.
There should be no voltage present on any of the circuits.
Measure the resistance between the Lateral Acceleration supply circuit and all 4 of
the Lateral Acceleration Sensor signal circuits.
The resistance between the circuits should be above 5.0 ohms.
Were there any problems found?All
Ye s!Repair the Lateral Acceleration Sensor circuit(s) for a short to
voltage.
No!Go To 4
4 Turn the ignition off.
Disconnect the Lateral Acceleration Sensor harness connector.
Disconnect the CAB harness connector.
Measure the resistance between the Lateral Acceleration Sensor ground and the 4
Lateral Acceleration Sensor signal circuits.
Measure the resistance between ground and the 4 Lateral Acceleration Sensor signal
circuits.
Measure the resistance between ground and the Lateral Acceleration Sensor supply
circuit.
Is the resistance below 5.0 ohms for any of the circuits?All
Ye s!Repair the Lateral Acceleration Sensor circuit(s) for a short to
ground.
No!Go To 5
5 Turn the ignition off.
Disconnect the Lateral Acceleration Sensor harness connector.
Disconnect the CAB harness connector.
Measure the resistance of the Lateral Acceleration Sensor supply circuit.
Measure the resistance of the Lateral Acceleration Sensor ground circuit.
Measure the resistance of the 4 Lateral Acceleration Sensor signal circuits.
Is the resistance above 5.0 ohms for any of the circuits?All
Ye s!Repair the Lateral Acceleration Sensor circuit(s) for an open
No!Go To 6
6 Turn the ignition off.
Disconnect the Lateral Acceleration Sensor harness connector.
Inspect the harness and connectors related to this circuit. If any problems are found,
repair as necessary.
If no problems are found, replace the Lateral Acceleration Sensor in accordance with
the Service Information.
With the DRBIIIt, clear DTCs.
With the DRBIIIt, perform the road test procedure.
With the DRBIIIt, read DTCs.
Does this DTC reset?All
Ye s!Replace the CAB in accordance with the Service Information.
No!Test Complete.
37
BRAKES (CAB)
LATERAL ACCELERATION SENSOR CIRCUIT ÐContinued

TEST ACTION APPLICABILITY
7 The condition that set this DTC is not present at this time.
Monitor the DRBIIItwhile wiggle testing the related harness and connectors. Look
for any related parameters to change or for the DTC to reset.
Inspect the related harness and connectors.
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out, or corroded terminals.
Were any problems found?All
Ye s!Repair as necessary.
No!Test Complete.
38
BRAKES (CAB)
LATERAL ACCELERATION SENSOR CIRCUIT ÐContinued

Symptom:
LATERAL ACCELERATION SENSOR INTERNAL FAULT
POSSIBLE CAUSES
LATERAL ACCELERATION SENSOR CIRCUIT INTERMITTENT DTC
LATERAL ACCELERATION SENSOR
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Turn the ignition on.
With the DRBIIIt, read DTCs. Record DTC information.
NOTE: If a system undervoltage or overvoltage DTC is set along with this
DTC, diagnose the system voltage DTC first.
NOTE: Electromagnetic (radio) interference can cause an intermittent
system malfunction by interrupting communication between the sensor
and the CAB.
With the DRBIIIt, erase DTCs.
Road test the vehicle and perform several steering and braking maneuvers.
With the DRBIIIt, perform the road test procedure.
With the DRBIIIt, read DTCs.
Does this DTC reset?All
Ye s!Replace the Lateral Acceleration Sensor in accordance with the
Service Information.
No!Go To 2
2 The condition that set this DTC is not present at this time.
Monitor the DRBIIItwhile wiggle testing the related harness and connectors. Look
for any related parameters to change or for the DTC to reset.
Inspect the related harness and connectors.
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out, or corroded terminals.
Were any problems found?All
Ye s!Repair as necessary.
No!Test Complete.
39
BRAKES (CAB)

Symptom List:
LEFT FRONT INLET SOLENOID
LEFT FRONT OUTLET SOLENOID
LEFT FRONT, RIGHT REAR INLET SOLENOID
LEFT FRONT, RIGHT REAR OUTLET SOLENOID
LEFT REAR INLET SOLENOID
LEFT REAR OUTLET SOLENOID
RIGHT FRONT INLET SOLENOID
RIGHT FRONT OUTLET SOLENOID
RIGHT FRONT, LEFT REAR INLET SOLENOID
RIGHT FRONT, LEFT REAR OUTLET SOLENOID
RIGHT REAR INLET SOLENOID
RIGHT REAR OUTLET SOLENOID
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be LEFT FRONT INLET SOLE-
NOID.
When Monitored and Set Condition:
LEFT FRONT INLET SOLENOID
When Monitored: Ignition On - Continuousy
Set Condition: When the electrical feedback signal does not match the actuation signal
for the solenoid OR during the solenoid and pump motor test when all solenoids are tested
in series and a solenoid response signal is detected.
POSSIBLE CAUSES
INTERMITTENT SOLENOID DTC
DAMAGED CAB/CAB HARNESS CONNECTOR
FUSED OPTIONAL EQUIPMENT RELAY OUTPUT CIRCUIT OPEN
FUSED B(+) CIRCUIT OPEN
GROUND CIRCUIT OPEN
ANTI-LOCK BRAKE CONTROLLER
40
BRAKES (CAB)

TEST ACTION APPLICABILITY
1NOTE: If a system undervoltage or overvoltage DTC is set along with this
DTC, diagnose the system voltage DTC first.
Turn the ignition on.
With the DRBIIIt, read DTCs.
With the DRBIIIt, erase DTCs.
Turn the ignition off.
Turn the ignition on.
Start the engine.
Drive the vehicle over 15 km/h (10 mph) to test solenoid and pump circuits.
Stop the vehicle.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay any SOLENOID DTCs?All
Ye s!Go To 2
No!Go To 6
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.
41
BRAKES (CAB)
LEFT FRONT INLET SOLENOID ÐContinued

TEST ACTION APPLICABILITY
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.
6 Turn the ignition off.
Visually inspect the related wiring harness.
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out, or corroded terminals.
Were any problems found?All
Ye s!Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No!Test Complete.
42
BRAKES (CAB)
LEFT FRONT INLET SOLENOID ÐContinued

Symptom List:
LEFT FRONT WHEEL SPEED SENSOR CIRCUIT
LEFT REAR WHEEL SPEED SENSOR CIRCUIT
RIGHT FRONT WHEEL SPEED SENSOR CIRCUIT
RIGHT REAR WHEEL SPEED SENSOR CIRCUIT
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be LEFT FRONT WHEEL SPEED
SENSOR CIRCUIT.
When Monitored and Set Condition:
LEFT FRONT WHEEL SPEED SENSOR CIRCUIT
When Monitored: Ignition On - Continuously
Set Condition: When the value of the wheel speed sensor circuit is open or shorted.
POSSIBLE CAUSES
INTERMITTENT WHEEL SPEED SENSOR CIRCUIT DTC
DAMAGED CAB/CAB HARNESS CONNECTOR
WHEEL SPEED SENSOR CIRCUIT SHORT TO VOLTAGE
WHEEL SPEED SENSOR CIRCUIT SHORT TO GROUND
WHEEL SPEED SENSOR CIRCUIT OPEN
WHEEL SPEED SENSOR CIRCUITS SHORTED TOGETHER
ANTI-LOCK BRAKE CONTROLLER
TEST ACTION APPLICABILITY
1NOTE: If a system undervoltage or overvoltage DTC is set along with this
DTC, diagnose the system voltage DTC first.
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 the DRBIIItdisplay any WHEEL SPEED SENSOR CIRCUIT DTCs?All
Ye s!Go To 2
No!Go To 7
43
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.
Measure the voltage of both affected Wheel Speed Sensor circuits in the CAB harness
connector.
NOTE: If the wheel is rotating, voltage will be present.
Is there any voltage present?All
Ye s!Repair the affected Wheel Speed Sensor circuit for a short to
voltage.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 4
4 Turn the ignition off.
Disconnect the CAB harness connector.
Measure the resistance between ground and both affected Wheel Speed Sensor
circuits in the CAB harness connector.
Is the resistance below 5.0 ohms?All
Ye s!Repair the affected Wheel Speed Sensor circuit for a short to
ground.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 5
5 Turn the ignition off.
Disconnect the CAB harness connector.
Measure the resistance between the affected Wheel Speed Sensor circuits in the CAB
harness connector.
Is the resistance over 1,800 ohms?All
Ye s!Repair the affected Wheel Speed Sensor circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 6
6 Turn the ignition off.
Disconnect the CAB harness connector.
Measure the resistance between the affected Wheel Speed Sensor circuits in the CAB
harness connector.
Is the resistance under 1,100 ohms?All
Ye s!Repair the affected Wheel Speed Sensor circuits for a short to
each other.
Perform ABS VERIFICATION TEST - VER 1.
No!Replace the Controller Antilock Brake in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
44
BRAKES (CAB)
LEFT FRONT WHEEL SPEED SENSOR CIRCUIT ÐContinued