Evaporator Temperature Sensor Circuit Shorted (Active) - Dodge Ram 2004 Service Manual

HEATING & A/C
Symptom:
EVAPORATOR TEMPERATURE SENSOR CIRCUIT SHORTED (AC-
TIVE)
When Monitored and Set Condition:

EVAPORATOR TEMPERATURE SENSOR CIRCUIT SHORTED (ACTIVE)

When Monitored: With the ignition on.
Set Condition: This DTC will set if the A/C - Heater Control Module sees voltage below
0.06 volts on the Evaporator Temperature Sensor Signal circuit.
EVAPORATOR TEMPERATURE SENSOR
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO SENSOR GROUND
CIRCUIT
A/C - HEATER CONTROL MODULE
TEST
1 Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
With the DRBIII
voltage.
Does the DRBIII display: 4.9 volts or greater?
Yes → Replace the Evaporator Temperature Sensor in accordance with
→ Go To 2
No
2 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Evaporator Temperature Sensor harness connector.
Measure the resistance between ground and the Evaporator Temperature Sensor
Signal circuit.
Is the resistance above 10K ohms?
Yes → Go To 3
→ Repair the Evaporator Temperature Sensor Signal circuit for a
No
POSSIBLE CAUSES
ACTION
in Sensor Display, read the Evaporator Temperature Sensor
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
short to ground.
Perform BODY VERIFICATION TEST - VER 1.
392
APPLICABILITY
All
All