2006 MERCEDES-BENZ SPRINTER Service Manual

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Page 185 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
4 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Reconnect the Automatic Temperature Control (ATC) C1 harness connector.
Turn the ignition on.
Whi

TEST ACTION APPLICABILITY
4 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Reconnect the Automatic Temperature Control (ATC) C1 harness connector.
Turn the ignition on.
While back probing, measure the voltage between the 5 Volt Supply circuit and
ground.
While back probing, measure the voltage between the Refrigerant Pressure Sensor
Feedback circuit and ground.
Is the voltage above 5.3 volts on either circuit?All
Ye s!Replace the Automatic Temperature Control (ATC) in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 5
5 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Refrigerant Pressure Sensor harness connector.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance of the 5 Volt Supply circuit between the Automatic Temper-
ature Control (ATC) C1 harness connector and the Refrigerant Pressure Sensor
harness connector.
Is the resistance below 5.0 ohms?All
Ye s!Go To 6
No!Repair the 5 Volt Supply circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
6 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Refrigerant Pressure Sensor harness connector.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance of the Refrigerant Pressure Sensor Feedback circuit between
the Automatic Temperature Control (ATC) C1 harness connector and the Refrigerant
Pressure Sensor harness connector.
Is the resistance below 5.0 ohms?All
Ye s!Go To 7
No!Repair the Refrigerant Pressure Sensor Feedback circuit for an
open.
Perform BODY VERIFICATION TEST - VER 1.
7 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Refrigerant Pressure Sensor harness connector.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance of the Sensor Ground circuit between the Automatic
Temperature Control (ATC) C1 harness connector and the Refrigerant Pressure
Sensor harness connector.
Is the resistance below 5.0 ohms?All
Ye s!Replace the Refrigerant Pressure Sensor in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No!Repair the Sensor Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
172
HEATING & A/C
REFRIG PRESS SENSOR HIGH OR OPEN (ACTIVE) ÐContinued

Page 186 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual Symptom:
REFRIG PRESS SENSOR SHORTED LOW (ACTIVE)
POSSIBLE CAUSES
REFRIGERANT PRESSURE SENSOR
5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND CIRCUIT
5 VOLT SUPPLY CIRC

Page 187 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance between the 5 Volt Supply circuit and the Ground circ

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance between the 5 Volt Supply circuit and the Ground circuit.
Is the resistance below 10k ohms?All
Ye s!Repair the 5 Volt Supply circuit for a short to the Ground circuit.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 4
4 Turn the ignition off.
Disconnect the Refrigerant Pressure Sensor harness connector.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance between the 5 Volt Supply circuit and the Sensor Ground
circuit.
Is the resistance below 10k ohms?All
Ye s!Repair the 5 Volt Supply circuit for a short to the Sensor Ground
circuit.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 5
5 Turn the ignition off.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance between ground and the Refrigerant Pressure Sensor
Feedback circuit.
Is the resistance below 10k ohms?All
Ye s!Repair the Refrigerant Pressure Sensor Feedback circuit for a
short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 6
6 Turn the ignition off.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance between the Refrigerant Pressure Sensor Feedback circuit
and the Ground circuit.
Is the resistance below 10k ohms?All
Ye s!Repair the Refrigerant Pressure Sensor Feedback circuit for a
short to the Ground circuit.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 7
7 Turn the ignition off.
Disconnect the Refrigerant Pressure Sensor harness connector.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance between the Refrigerant Pressure Sensor Feedback circuit
and the Sensor Ground circuit.
Is the resistance below 10k ohms?All
Ye s!Repair the Refrigerant Pressure Sensor Feedback circuit for a
short to the Sensor Ground circuit.
Perform BODY VERIFICATION TEST - VER 1.
No!Replace the Automatic Temperature Control (ATC) in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
174
HEATING & A/C
REFRIG PRESS SENSOR SHORTED LOW (ACTIVE) ÐContinued

Page 188 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual Symptom:
WATER CYCLE VALVE CONTROL HIGH OR OPEN (ACTIVE)
POSSIBLE CAUSES
WATER CYCLE VALVE
WATER CYCLE VALVE CONTROL CIRCUIT SHORTED TO VOLTAGE
AUTOMATIC TEMPERATURE CONTROL (ATC)
WATER CYCLE VALVE CO

Page 189 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
2 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Turn the ignition on.
Me

Page 190 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual Symptom:
WATER CYCLE VALVE CONTROL SHORTED LOW (ACTIVE)
POSSIBLE CAUSES
WATER CYCLE VALVE CONTROL CIRCUIT SHORTED TO GROUND
WATER CYCLE VALVE CONTROL CIRCUIT SHORTED TO GROUND CIRCUIT
WATER CYCLE VALV

Page 191 of 2305

Page 192 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual 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 CI

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