2006 MERCEDES-BENZ SPRINTER relay

TEST ACTION APPLICABILITY
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.
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.
24
BRAKES (CAB)
CAB OPTION ÐContinued

Symptom:
CAN COMMUNICATION ERROR
POSSIBLE CAUSES
CAN DTCS PRESENT IN OTHER MODULES
INTERMITTENT CAN COMMUNICATION ERROR DTC
DAMAGED CAB/CAB HARNESS CONNECTOR
CAN CIRCUIT(S) SHORT TO VOLTAGE
CAN CIRCUIT(S) SHORTED TOGETHER
CAN CIRCUIT(S) SHORT TO GROUND
CAN CIRCUIT(S) OPEN
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.
NOTE: Diagnose any Steering Angle Sensor DTCs that are present in this
module before continuing.
With the DRBIIIt, read DTCs in the Engine Control Module, Transmission Control
Module, and Instrument Cluster.
Are there any CAN communication DTCs present in any of these modules?All
Ye s!Refer to the diagnostic procedures for any CAN DTCs in ECM,
TCM and Cluster before proceeding with this test.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 2
2NOTE: 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, erase DTCs.
Turn the ignition off.
Start the engine.
With the DRBIIIt, read DTCs.
Does this DTC reset?All
Ye s!Go To 3
No!Go To 11
3 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 4
25
BRAKES (CAB)

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect the CAB harness connector.
Turn the ignition on.
Measure the voltage of the CAN(+) circuit.
Measure the voltage of the CAN(-) circuit.
Is the voltage above 3.0 volts for either circuit?All
Ye s!Repair the CAN circuit(s) for a short to voltage.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 5
5 Turn the ignition off.
Disconnect the CAB harness connector.
Measure the resistance between ground and the CAN(+) circuit.
Measure the resistance between ground and the CAN(-) circuit.
Is the resistance below 5.0 ohms for either circuit?All
Ye s!Repair the CAN circuit(s) for a short to ground.
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 CAN(+) circuit and the CAN(-) circuit.
Is the resistance below 5.0 ohms between the circuits?All
Ye s!Repair the shorted CAN circuit(s).
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 7
7 Turn the ignition off.
Disconnect the Engine Control Module harness connector.
Disconnect the CAB harness connector.
Measure the resistance of the CAN(+) circuit.
Measure the resistance of the CAN(-) circuit.
Is the resistance above 5.0 ohms for either circuit?All
Ye s!Repair the CAN circuit(s) for an open
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 8
8 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 9
No!Repair the Fused Optional Equipment Relay Output circuit for an
open.
Perform ABS VERIFICATION TEST - VER 1.
26
BRAKES (CAB)
CAN COMMUNICATION ERROR ÐContinued

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

Symptom:
PUMP MOTOR
When Monitored and Set Condition:
PUMP MOTOR
When Monitored: Ignition On - Continuously
Set Condition: When the pump motor voltage is not present after enabling the pump
motor relay OR pump motor has voltage when the pump motor relay is disabled OR pump
motor slow down test fails OR pump motor relay does not turn on completely.
POSSIBLE CAUSES
INTERMITTENT PUMP MOTOR DTC
DAMAGED CAB/CAB HARNESS CONNECTOR
FUSED OPTIONAL EQUIPMENT RELAY OUTPUT CIRCUIT OPEN
FUSED B(+) CIRCUIT OPEN
GROUND CIRCUIT OPEN
PUMP MOTOR
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 PUMP MOTOR?All
Ye s!Go To 4
No!Go To 2
2 Turn the ignition off.
Turn the ignition on.
With the DRBIIIt, actuate the Pump Motor.
Is the Pump Motor running?All
Ye s!Go To 3
No!Go To 4
57
BRAKES (CAB)

TEST ACTION APPLICABILITY
3 The conditions necessary to set this DTC are not present at this time.
Monitor DRBIIItparameters while wiggle testing the related wiring harness and
connectors.
Turn the ignition off.
Visually inspect the related wiring 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.
Perform ABS VERIFICATION TEST - VER 1.
No!Test Complete.
4 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 5
5 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 6
No!Repair the Fused Optional Equipment Relay Output circuit for an
open.
Perform ABS VERIFICATION TEST - VER 1.
6 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 7
No!Repair the Fused B(+) circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
58
BRAKES (CAB)
PUMP MOTOR ÐContinued

Symptom:
RELAY OUTPUT VOLTAGE
When Monitored and Set Condition:
RELAY OUTPUT VOLTAGE
When Monitored: Ignition On - Continuously.
Set Condition: When the CAB supply voltage is under 9.4, under 8.8 during an ABS event
or over 17.4 with vehicle speeds above 6 kph (4 mph).
POSSIBLE CAUSES
INTERMITTENT RELAY OUTPUT VOLTAGE DTC
BATTERY/CHARGING SYSTEM FAILURE
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.
Start the engine.
Drive the vehicle above 6 km/h (4 mph) for at least 30 seconds.
Stop the vehicle.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay RELAY OUTPUT VOLTAGE?All
Ye s!Go To 2
No!Go To 8
2 Turn the ignition off.
Perform a battery and charging system test in accordance with the Service Informa-
tion.
NOTE: Refer to symptom list for any problems related to the battery or
charging system.
Were any problems found?All
Ye s!Repair any charging system or battery related symptom(s) in
accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 3
60
BRAKES (CAB)