Mercedes-Benz Sprinter / Dodge Sprinter. Manual — part 34
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the A/C Compressor Clutch harness connector.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance between the A/C Compressor Clutch Control circuit and the
Sensor Ground circuit in the Automatic Temperature Control C1 harness connector.
Is the resistance below 10k ohms?
All
Yes
→ Repair the A/C Compressor Clutch Control 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.
133
HEATING & A/C
A/C COMPRESSOR CONTROL SHORTED LOW (ACTIVE) —
Continued
Symptom:
AIR OUTLET TEMP SENSOR HIGH OR OPEN (ACTIVE)
POSSIBLE CAUSES
AIR OUTLET TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
AUTOMATIC TEMPERATURE CONTROL (ATC)
AUTOMATIC TEMPERATURE CONTROL (ATC)
AIR OUTLET TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
AIR OUTLET TEMPERATURE SENSOR
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Air Outlet Temperature Sensor harness connector.
Turn the ignition on.
While back probing, measure the voltage between the Air Outlet Temperature Sensor
Signal circuit and the Sensor Ground circuit.
Is the voltage above 5.3 volts?
All
Yes
→ Go To 2
No
→ Go To 3
2
Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Air Outlet Temperature Sensor harness connector.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Turn the ignition on.
Measure the voltage of the Air Outlet Temperature Sensor Signal circuit.
Is the voltage above 0.2 volts?
All
Yes
→ Repair the Air Outlet Temperature Sensor Signal circuit for a
short to voltage.
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.
3
Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Air Outlet Temperature Sensor harness connector.
Turn the ignition on.
While back probing, measure the voltage between the Air Outlet Temperature Sensor
Signal circuit and Sensor Ground circuit in the Automatic Temperature Control
(ATC) C1 harness connector.
Is the voltage above 4.5 volts?
All
Yes
→ Go To 4
No
→ Replace the Automatic Temperature Control (ATC) in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
134
HEATING & A/C
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Disconnect the Air Outlet Temperature Sensor harness connector.
Measure the resistance of the Air Outlet Temperature Sensor Signal circuit between
the Automatic Temperature Control (ATC) C1 harness connector and the Air Outlet
Temperature Sensor harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 5
No
→ Repair the Air Outlet Temperature Sensor Signal circuit for an
open.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Disconnect the Air Outlet Temperature Sensor harness connector.
Measure the resistance of the Sensor Ground circuit between the Automatic
Temperature Control (ATC) C1 harness connector and the Air Outlet Temperature
Sensor harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Air Outlet Temperature 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.
135
HEATING & A/C
AIR OUTLET TEMP SENSOR HIGH OR OPEN (ACTIVE) —
Continued
Symptom:
AIR OUTLET TEMP SENSOR SHORTED LOW (ACTIVE)
POSSIBLE CAUSES
AIR OUTLET TEMPERATURE SENSOR
AIR OUTLET TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
AIR OUTLET TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND CIRCUIT
AUTOMATIC TEMPERATURE CONTROL (ATC)
AIR OUTLET TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIR-
CUIT
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the Air Outlet Temperature Sensor harness connector.
Turn the ignition on.
With the DRBIII
t, record and erase Automatic Temperature Control DTCs.
Turn the ignition off, wait 5 seconds, then turn the ignition on.
With the DRBIII
t, read the Automatic Temperature Control DTCs.
Does the DRBIII
t display: AIR OUTLET TEMP SENSOR HIGH OR OPEN?
All
Yes
→ Replace the Air Outlet Temperature Sensor in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition off.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance between ground and the Air Outlet Temperature Sensor
Signal circuit.
Is the resistance below 10k ohms?
All
Yes
→ Repair the Air Outlet Temperature Sensor Signal circuit for a
short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Measure the resistance between the Air Outlet Temperature Sensor Signal circuit
and the Ground circuit.
Is the resistance below 10k ohms?
All
Yes
→ Repair the Air Outlet Temperature Sensor Signal circuit for a
short to the Ground circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
136
HEATING & A/C
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