2006 MERCEDES-BENZ SPRINTER turn signal

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

TEST ACTION APPLICABILITY
7 Turn the ignition off.
Disconnect the Anti-Lock Brake module harness connector.
Connect a voltmeter to the Wheel Speed Sensor (+) and (-) circuits at the Antilock
Brake module harness connector.
Rotate the wheel at a speed of at least one revolution per second while monitoring the
voltage.
Is the AC voltage fluctuating above 120 mV?All
Ye s!Replace the Controller Antilock Brake in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
No!Replace the affected Wheel Speed Sensor in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
8 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.
Look for any wiring conditions that may cause electromagnetic interference with the
Wheel Speed Sensor circuits.
Inspect Wheel Speed sensors, Tone Wheels, Brake Rotors, Wheel Bearings, etc, for
conditions that may cause speed variations from wheel to wheel.
Were any problems found?All
Ye s!Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No!Test Complete.
48
BRAKES (CAB)
LEFT FRONT WHEEL SPEED SENSOR SIGNAL ÐContinued

Symptom:
STEERING ANGLE SENSOR IMPLAUSIBLE CAN SIGNAL
POSSIBLE CAUSES
STEERING ANGLE SENSOR INTERMITTENT DTC
STEERING ANGLE SENSOR CAN CIRCUIT OPEN
STEERING ANGLE SENSOR
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.
NOTE: Electromagnetic (radio) interference can cause an intermittent
system malfunction by interrupting communication between the sensor
and the CAB.
NOTE: The Steering Angle Sensor is very sensitive to changes due to
alignment problems. The sensor must be recalculated using the DRBIIItif
alignment has been changed by more than 5 degrees.
Turn the ignition on.
With the DRBIIIt, erase DTCs.
Test drive the vehicle.
Using the DRBIIIt, perform the road test procedure.
With the DRBIIIt, read DTCs.
NOTE: If the ESP lamp remains illuminated after the test has completed, a
fault code will be set indicating the cause of the failure.
Does this DTC reset?All
Ye s!Go To 2
No!Go To 4
2 Turn the ignition off.
Disconnect the Steering Angle Sensor harness connector.
Disconnect the CAB harness connector.
Measure the resistance of the Steering Angle Sensor CAN(+) circuit.
Measure the resistance of the Steering Angle Sensor CAN(-) circuit.
Is the resistance above 5.0 ohms for either circuit?All
Ye s!Repair the Steering Angle Sensor CAN circuit for an open.
No!Go To 3
68
BRAKES (CAB)

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Steering Angle 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 Steering Angle Sensor in accordance with the
Service Information.
Turn the ignition on.
With the DRBIIIt, clear DTCs.
Using 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.
4 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.
69
BRAKES (CAB)
STEERING ANGLE SENSOR IMPLAUSIBLE CAN SIGNAL ÐContinued

Verification Tests
ABS VERIFICATION TEST - VER 1 APPLICABILITY
1. Turn the ignition off.
2. Connect all previously disconnected components and connectors.
3. Ensure all accessories are turned off and the battery is fully charged.
4. Ensure that the Ignition is on, and with the DRBIII, erase all Diagnostic Trouble Codes from
ALL modules. Start the engine and allow it to run for 2 minutes and fully operate the system
that was malfunctioning.
5. Turn the ignition off and wait 5 seconds. Turn the ignition on and using the DRBIII, read
DTC's from ALL modules.
6. If any Diagnostic Trouble Codes are present, return to Symptom list and troubleshoot new
or recurring symptom.
7. NOTE: If the CAB/HCU was replaced, ensure the CAB has been initialized
8. NOTE: If the SKREEM or ECM was replaced, refer to the service information for
proper programming procedures.
9. NOTE: For Sensor Circuit/Signal and Pump Motor faults, the CAB must sense all 4
wheels at 12 km/h (8 mph) before it will extinguish the ABS Indicator.
10. If there are no DTC's present after turning ignition on, road test the vehicle for at least 5
minutes. Perform several antilock braking stops.
11. CAUTION: Ensure braking capability is available before road testing.
12. Again, with the DRBIIItread DTC's. If any DTC's are present, return to Symptom list.
13. If there are no Diagnostic Trouble Codes (DTC's) present, and the customer's concern can
no longer be duplicated, the repair is complete.
Are any DTC's present or is the original concern still present?All
Ye s!Repair is not complete, refer to appropriate symptom.
No!Repair is complete.
79
VERIFICATION TESTS

INSTRUMENT CLUSTER C2 - WHITECAV CIRCUIT FUNCTION
1- -
2- -
3 20RD/YL FUSED B(+)
4 20BR/WT BRAKE WEAR SENSOR SIGNAL
5- -
6 18BR GROUND
7 20GY/DG/RD LAMP DRIVER
8 20BL/WT FUSED HIGH BEAM SWITCH OUTPUT
9 20BL/RD/WT VEHICLE SPEED SENSOR OUTPUT
10 20BK FUSED IGNITION SWITCH OUTPUT (RUN-START)
11 20BL/BK KEY-IN IGNITION SWITCH SIGNAL
12 - -
13 20BK/WT LEFT TURN SIGNAL
14 20BR/YL BRAKE FLUID LEVEL INDICATOR SIGNAL
15 20BL GENERATOR FIELD DRIVER
16 20YL AIRBAG WARNING INDICATOR DRIVER
17 - -
18 20BL/VT D(+) RELAY NO. 1 CONTROL
18 20BL/VT D(+) RELAY NO. 1 CONTROL
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
TCS SWITCH (ASR) - BLACKCAV CIRCUIT FUNCTION
1 16GY/DG/RD LAMP DRIVER
2- -
3 18BK/BL TCS SWITCH (ASR) SENSE
4- -
5- -
6- -
7 16BK/BL/DG FUSED IGNITION SWITCH OUTPUT
8- -
9- -
10 16BR GROUND
WHEEL SPEED SENSOR-LEFT FRONTCAV CIRCUIT FUNCTION
1 18BK LEFT FRONT WHEEL SPEED SENSOR (+)
2 18BR LEFT FRONT WHEEL SPEED SENSOR (-)
C
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CONNECTOR PINOUTS

3.2.2 ECM OPERATING MODES
As input signals to the ECM change, the ECM
adjusts its response to the output devices. For
example, the ECM must calculate a different fuel
quantity and fuel timing for engine idle condition
than it would for a wide open throttle condition.
There are several different modes of operation that
determine how the ECM responds to the various
input signals.
Ignition Switch On (Engine Off)
When the ignition is turned on the ECM activates
the glow plug relay for a time period that is deter-
mined by engine coolant temperature, intake air
temperature and battery voltage.
Engine Start-Up Mode
The ECM uses the intake air temperature sensor,
engine temperature sensor and the crankshaft po-
sition sensor (engine speed) inputs to determine
fuel injection quantity.
Normal Driving Modes
Engine idle, warm-up, acceleration, deceleration
and wide open throttle modes are controlled based
on all of the sensor inputs to the ECM. The ECM
uses these sensor inputs to adjust fuel quantity and
fuel injector timing. EGR valve control is performed
using feedback from the oxygen sensor. An oxygen
sensor is located in the exhaust manifold to sample
oxygen content exiting the engine cylinders. The
ECM uses the O2 sensor, along with other sensor
inputs, to govern the amount of exhaust gas recir-
culation to reduce HC (HydroCarbons) and CO
(Carbon Monoxide). Engine coolant is routed
through the base of the EGR valve to provide
additional cooling of the exhaust gas, which further
helps the reductions of emissions. The EGR valve
has a self-cleaning function. When the engine is
shut off, the EGR valve rotates twice to reduce
carbon deposits at the valve seat.
Overheat Production Mode
If the engine temperature is above 105ÉC (221ÉF)
and vehicle speed is above 40 km/h (25 MPH) the
ECM will limit fuel quantity for engine protection.
Limp-In Mode
The ECM utilizes different degrees of engine
limp-in. The ECM is able to limit engine rpm,
engine power output (turbo boost reduction), acti-
vate engine cooling fan or all of these functions
based on the type of fault that is detected. Critical
engine performance faults such as accelerator pedal
position sensor fault will result in a fixed idle speed
of approximately 680 rpm regardless of actual pedalposition. Other less critical faults will result in
power reduction throughout the full range of driv-
ing conditions.
Overspeed Detection Mode
If the ECM detects engine RPM that exceeds
5200 RPM, the ECM will set a DTC in memory,
limit engine RPM to no more than 2500 RPM, and
illuminate the MIL until the DTC is cleared.
After-Run Mode
The ECM transfers RAM information to ROM
and performs an Input/Output state check.
3.2.3 MONITORED CIRCUITS
The ECM is able to monitor and identify most
driveability related trouble conditions. Some cir-
cuits are directly monitored through ECM feedback
circuitry. In addition, the ECM monitors the voltage
state of some circuits and compares those states
with expected values. Other systems are monitored
indirectly when the ECM conducts a rationality test
to identify problems.
Although most subsystems of the engine control
module are either directly or indirectly monitored,
there may be occasions when diagnostic trouble
codes are not immediately identified. For a trouble
code to set, a specific set of conditions must occur
and unless these conditions occur, a DTC will not
set.
3.2.4 SKREEM OVERVIEW
The sentry key remote entry module system
(SKREEM) is designed to prevent unauthorized
vehicle operation. The system consists of a sentry
key remote entry module (SKREEM), ignition
key(s) equipped with a transponder chip and the
ECM. When the ignition switch is turned on, the
SKREEM interrogates the ignition key. If the igni-
tion key is Valid or Invalid, the SKREEM sends a
message to the ECM indicating ignition key status.
Upon receiving this message the ECM will termi-
nate engine operation or allow the engine to con-
tinue to operate.
3.2.5 SKREEM ON-BOARD DIAGNOSTICS
The SKREEM has been programmed to transmit
and monitor many different coded messages as well
as CAN Bus messages. This monitoring is called
On-Board Diagnostics. Certain criteria must be met
for a DTC to be entered into SKREEM memory. The
criteria may be a range of; input voltage, CAN Bus
message or coded messages to the SKREEM. If all
the criteria for monitoring a circuit or function are
met and a fault is detected, a DTC will be stored in
the SKREEM memory and the START ERROR indi-
cator will be turned on in the instrument cluster.
2
GENERAL INFORMATION

TEST ACTION APPLICABILITY
1NOTE: If DTC P1611, P2306 or P2332 is present with this DTC, diagnose
DTCs P1611, P2306 or P2332 before diagnosing this DTC.
NOTE: Inspect all air intake and turbocharger related tubes for damage,
restriction or poor connection. Any of these conditions can cause a this DTC
to set.
NOTE: If the ECM detects and stores a DTC, the ECM also stores the
engine/vehicle operating conditions under which the DTC was set. Some of
these conditions are displayed on the DRB at the same time the DTC is
displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to
duplicate these conditions may assist when checking for an active DTC.
Turn the ignition on.
With the DRBIIIt, erase the ECM DTCs.
Test drive the vehicle.
With the DRBIIIt, read the ECM DTCs.
Does the DRB III display a Mass Air Flow Sensor DTC?All
Ye s!Go To 2
No!Go To 16
2NOTE: Check the ECM for other ECM DTC's related to circuits that are
open, shorted to ground or low voltage problems.
Does the DRB also display these type of DTC's?All
Ye s!Go To 3
No!Go To 4
3 Turn the ignition off.
Disconnect the ECM harness connectors.
Turn the ignition on.
Connect a jumper wire between ground and the Engine Control Relay Signal circuit
in ECM C2 harness connector cavity 44.
Using a 12-volt test light connected to ground, check the Fused Engine Control Relay
Output circuits at the ECM C1 harness connector cavities 1, 3 and 5.
Does the test light illuminate brightly for each circuit?All
Ye s!Go To 4
No!Refer to symptom list and perform Checking the ECM Power and
Grounds.
Perform ROAD TEST VERIFICATION - VER-2.
4NOTE: A malfunctioning EGR system can cause this DTC to set. Refer to
symptom Checking the EGR System in the Driveability category to check
EGR system operation.
Turn the ignition off.
Disconnect the MAF Sensor harness connector.
Turn the ignition on.
Measure the voltage of the MAF Sensor 5 Volt Supply circuit in MAF Sensor harness
connector.
Is the voltage between 4.8 and 5.2 volts?All
Ye s!Go To 5
No!Go To 12
21
DRIVEABILITY - DIESEL
P0100-MASS AIR FLOW SENSOR SIGNAL VOLTAGE TOO LOW Ð
Continued