Chrysler Sebring, Stratus sedan, Sebring Convertible. Manual — part 78
TEST
ACTION
APPLICABILITY
3
Turn the ignition on.
With the DRBIII
t in Automatic Temperature Control, Monitor Display, PCI Bus Info
ATC, look for VF DIM Msg Present.
Does the DRB display: VF DIM Msg present: Yes?
All
Yes
→ Replace the Automatic Temperature Control in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Body Control Module in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
NOTE: Visually inspect the related wiring harness and circuits. Look for
any chafed, pierced, pinched, or partially broken wires.
NOTE: Visually inspect the related wiring harness connectors. Look for
broken, bent, pushed out, or corroded terminals.
NOTE: Refer to any Technical Service Bulletins (TSB) that may apply.
Were any problems found?
All
Yes
→ Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
297
HEATING & A/C
DIMMING CODE RX FAILURE - ATC —
Continued
Symptom:
EVAPORATOR SENSOR FAILURE - ATC & MTC
When Monitored and Set Condition:
EVAPORATOR SENSOR FAILURE - ATC & MTC
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the BCM detects voltage below 0.06 volts or above 4.8
volts on the evaporator temperature sensor signal input.
POSSIBLE CAUSES
EVAPORATOR TEMPERATURE SENSOR SIGNAL CKT SHORT TO VOLTAGE
EVAPORATOR TEMPERATURE SENSOR OPEN
EVAPORATOR TEMP SENSOR SIGNAL CKT OPEN
SENSOR GROUND OPEN
BODY CONTROL MODULE - EVAPORATOR TEMP SENSOR STAYS HIGH
EVAPERATOR TEMPERATURE SENSOR
INTERMITTENT WIRING PROBLEM
EVAPORATOR TEMP SENSOR SIGNAL CIRCUIT SHORT TO GROUND
EVAPORATOR TEMP SENSOR SIGNAL CKT SHORT TO SENSOR GROUND
BODY CONTROL MODULE - EVAPORATOR TEMP SENSOR STAYS LOW
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t in Sensors, read the Evaporator Temperature Sensor voltage.
Is the voltage above 5.5 volts?
All
Yes
→ Go To 2
No
→ Go To 7
2
Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
Measure the voltage of the Evaporator Temperature Sensor Signal circuit.
Is the voltage above 5.5 volts?
All
Yes
→ Repair the Evaporator Temperature Sensor Signal ckt for a short
to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
298
HEATING & A/C
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
Connect a jumper wire between the Evaporator Temperature Sensor Signal circuit
and the Sensor Ground circuit.
With the DRBIII
t in Sensors, read the Evaporator Temperature Sensor voltage.
Is the voltage 4.5 volts or above?
All
Yes
→ Go To 4
No
→ Replace the Evaporator Temperature Sensor in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Disconnect the Body Control Module C2 harness connector.
Measure the resistance of the Evaporator Temp Sensor Signal circuit between the
BCM C2 connector and the Evaporator Temperature Sensor connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 5
No
→ Repair the Evaporator Temperature Sensor Signal circuit for an
open.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Disconnect the Body Control Module C2 harness connector.
Measure the resistance of the Sensor Ground circuit between the BCM C2 connector
and the Evaporator Temp Sensor connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 6
No
→ Repair the Sensor Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
6
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Body Control Module in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
7
Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
With the DRBIII
t in Sensors, read the Evaporator Temperature Sensor voltage.
Is the voltage 4.5 volts or above?
All
Yes
→ Go To 8
No
→ Go To 9
299
HEATING & A/C
EVAPORATOR SENSOR FAILURE - ATC & MTC —
Continued
TEST
ACTION
APPLICABILITY
8
Place the vehicle out of direct sunlight.
Lower the windows.
Allow the vehicle to come to ambient temperature.
Place a thermometer in one of the instrument panel outlets, and a second thermom-
eter in the intake duct.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
Turn the Mode Control switch to the Panel or Bi-level position (Recirc off).
Turn the Blower switch on high and allow it to run until both temperature readings
are within 2° of one another and constant.
Measure and record the Evaporator Temperature Sensor resistance.
Consult the following specifications to determine if the Evaporator Temperature
Sensor resistance is within the specification.
8.7K to 9.2K ohms at 12°C (53.6°F).
8.3K to 8.9K ohms at 13°C (55.4°F).
7.9K to 8.5K ohms at 14°C (57.2°F).
7.6K to 8.1K ohms at 15°C (59°F).
6.0K to 6.5k ohms at 20°C (68°F).
4.8K to 5.2K ohms at 25°C (77°F).
3.8K to 4.2K ohms at 30°C (86°F).
3.1K to 3.4K ohms at 35°C (95°F).
2.5K to 2.8K ohms at 40°C (104°F).
Is the Evaporator Temperature Sensor resistance within the specification?
All
Yes
→ Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for conditions causing an intermittent
short or open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Evaporator Temperature Sensor in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
9
Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Disconnect the Body Control Module C2 harness connector.
Measure the resistance between ground and the Evaporator Temperature Sensor
Signal circuit at the BCM C2 connector.
Is the resistance below 1000.0 ohms?
All
Yes
→ Repair the Evaporator Temperature Sensor Signal circuit for a
short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 10
10
Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Disconnect the Body Control Module C2 harness connector.
Measure the resistance between the Evaporator Temp Sensor Signal circuit and the
Sensor Ground circuit in the Evaporator Temperature Sensor connector.
Is the resistance below 1000.0 ohms?
All
Yes
→ Repair the Evaporator Temperature Sensor Signal circuit for a
short to the Sensor Ground circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 11
300
HEATING & A/C
EVAPORATOR SENSOR FAILURE - ATC & MTC —
Continued
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