2006 MERCEDES-BENZ SPRINTER brake sensor

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 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

TEST ACTION APPLICABILITY
7 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.
45
BRAKES (CAB)
LEFT FRONT WHEEL SPEED SENSOR CIRCUIT ÐContinued

Symptom List:
LEFT FRONT WHEEL SPEED SENSOR SIGNAL
LEFT REAR WHEEL SPEED SENSOR SIGNAL
RIGHT FRONT WHEEL SPEED SENSOR SIGNAL
RIGHT REAR WHEEL SPEED SENSOR SIGNAL
WHEEL SPEED SENSOR SIGNAL ERROR
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be LEFT FRONT WHEEL SPEED
SENSOR SIGNAL.
When Monitored and Set Condition:
LEFT FRONT WHEEL SPEED SENSOR SIGNAL
When Monitored: Ignition On - Continuously
Set Condition: When the value of the wheel speed sensor signal is missing at vehicle
speeds over 40 km/h (25 mph) OR during a start-up test with vehicle speeds over 12km/h
(8 mph) OR the vehicle is accelerated by 18 km/h (12 mph) after a wheel speed sensor
signal has been lost.
POSSIBLE CAUSES
INTERMITTENT WHEEL SPEED SENSOR SIGNAL DTC
DAMAGED SENSOR/CAB HARNESS CONNECTOR
DAMAGED WHEEL SPEED SENSOR TONE WHEEL
EXCESSIVE WHEEL SPEED SENSOR AIR GAP
DAMAGED WHEEL BEARING
DAMAGED BRAKE LININGS/COMPONENTS
WHEEL SPEED SENSOR FAILURE
ANTI-LOCK BRAKE CONTROLLER
TEST ACTION APPLICABILITY
1NOTE: Refer to the symptom list and repair any WHEEL SPEED SENSOR
CIRCUIT DTCs before continuing.
Turn the ignition on.
With the DRBIIItin Sensors, monitor ALL the Wheel Speed Sensor signals while an
assistant drives the vehicle.
Slowly accelerate from a stop to 65 km/h (40 mph).
NOTE: Wheel Speed should not vary by more than 10% from wheel to wheel
when driving in a straight line.
Do any of the Wheel Speed Sensor signals vary by greater than 10% while driving in
a straight line?All
Ye s!Go To 2
No!Go To 8
46
BRAKES (CAB)

TEST ACTION APPLICABILITY
2 Turn the ignition off.
Inspect the CAB harness connector and affected Wheel Speed Sensor.
Inspect for looseness.
Inspect wiring harness.
Inspect for metal chips on sensor.
Is the Wheel Speed Sensor or CAB harness connector damaged?All
Ye s!Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 3
3 Turn the ignition off.
Inspect the affected Wheel Speed Sensor(s) tone wheel for damage, looseness, or
missing.
NOTE: Refer to the appropriate Service information, if necessary, for
procedures or specifications.
Is the affected tone wheel OK?All
Ye s!Go To 4
No!Replace the tone wheel in accordance with the Service Informa-
tion.
Perform ABS VERIFICATION TEST - VER 1.
4 Turn the ignition off.
Inspect the affected Wheel Speed Sensor air gap.
NOTE: Refer to the appropriate Service information, if necessary, for
procedures or specifications.
Is the affected air gap OK?All
Ye s!Go To 5
No!Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
5 Turn the ignition off.
Inspect the affected Wheel Speed Sensor(s) wheel bearing.
NOTE: Refer to the appropriate Service information, if necessary, for
procedures or specifications.
Is the affected wheel bearing clearance OK?All
Ye s!Go To 6
No!Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Visually inspect the brakes for locking up due to lining contamination or overheating.
Inspect all brake components for defects which would cause a speed difference.
Were any problems found?All
Ye s!Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 7
47
BRAKES (CAB)
LEFT FRONT WHEEL SPEED SENSOR SIGNAL ÐContinued