battery MERCEDES-BENZ SPRINTER 2006 Manual Online

Symptom:
*NO RESPONSE FROM SENTRY KEY REMOTE ENTRY MODULE
POSSIBLE CAUSES
CHECK POWERS AND GROUNDS TO THE SENTRY KEY REMOTE ENTRY MODULE
K-SKREEM CIRCUIT SHORTED TO GROUND
K-SKREEM CIRCUIT SHORTED TO VOLTAGE
K-SKREEM CIRCUIT OPEN
SENTRY KEY REMOTE ENTRY MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the SKREEM harness connector.
Check each power and ground circuit to the module.
Were any problems found?All
Ye s!Refer to the wiring diagrams located in the service information to
help isolate an open or shorted condition. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 2
2 Turn the ignition off.
Disconnect the SKREEM harness connector.
Disconnect the DRBIIItfrom the DLC.
Measure the resistance between ground and the K-SKREEM circuit.
Is the resistance below 5.0 ohms?All
Ye s!Repair the K-SKREEM circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 3
3 Turn the ignition off.
Disconnect the DRBIIItfrom the DLC.
Disconnect the SKREEM harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the K-SKREEM circuit.
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!Repair the K-SKREEM circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 4
122
COMMUNICATION

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect the DRBIIItfrom the DLC.
Disconnect the Shifter Assembly harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the K-ABS, Shifter Assembly
circuit.
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!Go To 6
5 Turn the ignition off.
Disconnect the Controller Antilock Brake harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the K-ABS, Shifter Assembly
circuit.
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!Repair the K-ABS, Shifter Assembly circuit for a short to voltage.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Replace the Controller Antilock Brake in accordance with the
service information.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Disconnect the Shifter Assembly harness connector.
Disconnect the DRBIIItfrom the DLC.
Measure the resistance of the K-ABS, Shifter Assembly circuit between the Shifter
Assembly connector and the DLC.
Is the resistance below 5.0 ohms?All
Ye s!Replace the Shifter Assembly in accordance with the Service
Information.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Repair the K-ABS, Shifter Assembly circuit for an open.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
125
COMMUNICATION
*NO RESPONSE FROM SHIFTER ASSEMBLY ÐContinued

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect the DRBIIItfrom the DLC.
Disconnect the TCM harness connectors.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the K-TCM, RADIO circuit.
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!Go To 6
5 Turn the ignition off.
Disconnect the Radio harness connectors.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the K-TCM, RADIO circuit.
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!Repair the K-TCM, RADIO circuit for a short to voltage.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Replace the Radio in accordance with the service information.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Disconnect the TCM harness connectors.
Disconnect the DRBIIItfrom the DLC.
Measure the resistance of the K-TCM, RADIO circuit between the TCM connector
and the DLC.
Is the resistance below 5.0 ohms?All
Ye s!Replace the Transmission Control Module in accordance with the
Service Information.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Repair the K-TCM, RADIO circuit for an open.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
127
COMMUNICATION
*NO RESPONSE FROM TRANSMISSION CONTROL MODULE ÐContinued

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
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

TEST ACTION APPLICABILITY
2 Turn the ignition off.
Using a voltmeter, connect one end to the CAN circuit that previously measured
above 3.0 volts, and the other end to ground.
NOTE: Refer to the wiring diagrams in the service information to help
determine which modules are connected to the CAN Bus.
NOTE: Wait one minute, after turning the ignition off, before disconnecting
the module.
Disconnect a module that is connected to the CAN bus.
Turn the ignition on.
Monitor and note the voltmeter reading.
Repeat this procedure until either the voltage reading drops below 3.0 volts or all
modules that are connected to the CAN Bus are disconnected and the voltage reading
remains above 3.0 volts. Then, proceed to the conclusion question.
What is the outcome?All
> 3.0 volts w/all modules disconnected
Repair the CAN C Bus (+) circuit or the CAN C Bus (-) circuit for
a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
< 3.0 volts after disconnecting a module
Replace the module that caused the voltage reading to drop after
disconnecting it.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Disconnect the Instrument Cluster harness connectors.
Disconnect the negative battery cable.
Measure the resistance between ground and the CAN C Bus (+) circuit.
Measure the resistance between ground and the CAN C Bus (-) circuit.
Is the resistance below 50.0 ohms on either circuit?All
Ye s!Go To 4
No!Go To 5
4 Turn the ignition off.
Disconnect the negative battery cable.
Using an ohmmeter, connect one end to the CAN Bus circuit that previously
measured below 50.0 ohms and the other end to ground.
NOTE: Refer to the wiring diagrams in the service information to help
determine which modules are connected to the CAN Bus.
Disconnect a module that is connected to the CAN Bus.
Monitor and note the ohmmeter reading.
Repeat this procedure until either the resistance reading goes above 50.0 ohms or all
modules that are connected to the CAN Bus are disconnected and the resistance
reading remains below 50.0 ohms. Then, proceed to the conclusion question.
What is the outcome?All
< 50.0 ohms w/all modules disconnected
Repair the CAN C Bus (+) circuit or the CAN C Bus (-) circuit for
a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
>50.0 ohms after disconnecting a module
Replace the module that caused the resistance reading to increase
after disconnecting it.
Perform BODY VERIFICATION TEST - VER 1.
161
HEATING & A/C
NO COMMUNICATION BUS (ACTIVE) ÐContinued

TEST ACTION APPLICABILITY
5 Turn the ignition off.
Disconnect the negative battery cable.
NOTE: Refer to the wiring diagrams in the service information to help
determine which modules are connected to the CAN Bus.
Disconnect all of the modules that are connected to the CAN Bus.
Measure the resistance between the CAN C Bus (+) circuit and the CAN C Bus (-)
circuit at any disconnected module's harness connector.
Is the resistance below 10k ohms?All
Ye s!Repair the CAN C Bus (+) circuit for a short to the CAN C Bus (-)
circuit.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 6
6 Turn the ignition off.
Reconnect the Engine Control Module harness connectors.
While back probing, measure the resistance of the CAN C Bus (+) circuit and the
CAN C Bus (-) circuit at the ECM harness connector.
Is the resistance 120.0   2.0 ohms?All
Ye s!Replace the Sentry Key Remote Entry Module in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No!Replace the Engine Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
162
HEATING & A/C
NO COMMUNICATION BUS (ACTIVE) ÐContinued

Symptom:
AMBIENT TEMP SENSOR OPEN/SHORT TO BATTERY
POSSIBLE CAUSES
AMBIENT TEMPERATURE SENSOR SIGNAL (+) CIRCUIT SHORT TO VOLTAGE
AMBIENT TEMPERATURE SENSOR
AMBIENT TEMPERATURE SENSOR SIGNAL RETURN CIRCUIT OPEN
AMBIENT TEMPERATURE SENSOR SIGNAL (+) CIRCUIT OPEN
INSTRUMENT CLUSTER
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Ambient Temperature Sensor harness connector.
Disconnect the Instrument Cluster C1 harness connector.
Measure the voltage between the Ambient Temperature Sensor Signal (+) circuit and
ground.
Is the voltage above 0.2 volts?All
Ye s!Repair the Ambient Temperature Sensor Signal (+) circuit for a
short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 2
2 Disconnect the Ambient Temperature Sensor harness connector.
Connect a jumper wire between the Ambient Temperature Sensor Signal (+) and
Ambient Temperature Sensor Signal Return circuit.
Turn the ignition on, with the DRBIIIt, read DTCs.
Does the DRBIIItdisplay Ambient Temperature Sensor Short to Ground?All
Ye s!Replace the Ambient Temperature Sensor.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 3
3 Turn the ignition off.
Disconnect the Ambient Temperature Sensor harness connector.
Disconnect the Instrument Cluster C1 harness connector.
Measure the resistance of the Ambient Temperature Sensor Signal Return circuit
between the Instrument Cluster C1 harness connector and the Ambient Temperature
Sensor harness connector.
Is the resistance above 10 ohms?All
Ye s!Repair the Ambient Temperature Sensor Signal Return circuit for
an open.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 4
179
INSTRUMENT CLUSTER

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Disconnect the Ambient Temperature Sensor harness connector.
Measure the resistance of the Ambient Temperature Sensor Signal (+) circuit
between the Instrument Cluster C1 harness connector and the Ambient Temperature
Sensor harness connector.
Is the resistance above 10 ohms?All
Ye s!Repair the Ambient Temperature Sensor Signal (+) circuit for an
open.
Perform BODY VERIFICATION TEST - VER 1.
No!Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
180
INSTRUMENT CLUSTER
AMBIENT TEMP SENSOR OPEN/SHORT TO BATTERY ÐContinued