Symptom:
EVAPORATOR TEMPERATURE SENSOR CIRCUIT OPEN (ACTIVE)
When Monitored and Set Condition:
EVAPORATOR TEMPERATURE SENSOR CIRCUIT OPEN (ACTIVE)
When Monitored: With the ignition on.
Set Condition: This DTC will set if the A/C - Heater Control Module sees voltage above
4.9 volts on the Evaporator Temperature Sensor Signal circuit.
POSSIBLE CAUSES
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED HIGH
EVAPORATOR TEMPERATURE SENSOR
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Turn the ignition on.
Measure the voltage between the Evaporator Temperature Sensor Signal circuit and
ground.
Is there any voltage present?
All
Yes → Repair the Evaporator Temperature Sensor Signal circuit for a
short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 2
2 Turn the ignition off.
NOTE: Ensure that the A/C - Heater Control Module C1 harness connector is
connected to the A/C - Heater Control Module.
Disconnect the Evaporator Temperature Sensor harness connector.
Connect a jumper wire between the Evaporator Temperature Sensor Signal circuit
and the Sensor Ground circuit at the Evaporator Temperature Sensor harness
connector.
Turn the ignition on.
With the DRBIIIt in Sensor Display, read the Evaporator Temperature Sensor
voltage.
Is the voltage below 0.10 volt?
All
Yes → Replace the Evaporator Temperature Sensor in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 3
390
HEATING & A/C
To Next Page
Loading...
