Evap Temp Sensor High Or Open (Active) - Mercedes-Benz Sprinter 2003 Manual

HEATING & A/C
Symptom:

EVAP TEMP SENSOR HIGH OR OPEN (ACTIVE)

EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
AUTOMATIC TEMPERATURE CONTROL (ATC)
AUTOMATIC TEMPERATURE CONTROL (ATC)
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
EVAPORATOR TEMPERATURE SENSOR
TEST
1 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
While back probing, measure the voltage between the Evaporator Temperature
Sensor Signal circuit and the Sensor Ground circuit.
Is the voltage above 5.3 volts?
Yes → Go To 2
→ Go To 3
No
2 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Evaporator Temperature Sensor harness connector.
Disconnect the Automatic Temperature Control (ATC) C1 harness connector.
Turn the ignition on.
Measure the voltage of the Evaporator Temperature Sensor Signal circuit.
Is the voltage above 0.2 volts?
Yes → Repair the Evaporator Temperature Sensor Signal circuit for a
→ Replace the Automatic Temperature Control (ATC) in accordance
No
3 Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
While back probing, measure the voltage between the Evaporator Temperature
Sensor Signal circuit and Senor Ground circuit in the Automatic Temperature
Control (ATC) C1 harness connector.
Is the voltage above 4.5 volts?
Yes → Go To 4
→ Replace the Automatic Temperature Control (ATC) in accordance
No
POSSIBLE CAUSES
ACTION
short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
154
APPLICABILITY
All
All
All