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Home >> Chrysler >> 2001 >> Sebring LX, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Body Diagnostic Procedures - Except Coupe) >> Diagnostic Information And Procedures >> Heating & A/C >> Symptom: EVAPORATOR SENSOR FAILURE - ATC & MTC >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE - DIMMING CODE RX FAILURE - ATC

TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIII® in Sensors, read the Evaporator Temperature Sensor voltage.
Is the voltage above 5.5 volts?
Yes --> Go To 2
No --> Go To 7		 All
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?
Yes --> Repair the Evaporator Temperature Sensor Signal ckt for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Go To 3		 All
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® in Sensors, read the Evaporator Temperature Sensor voltage.
Is the voltage 4.5 volts or above?
Yes --> Go To 4
No --> Replace the Evaporator Temperature Sensor in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1 .		 All
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?
Yes --> Go To 5
No --> Repair the Evaporator Temperature Sensor Signal circuit for an open.
Perform BODY VERIFICATION TEST - VER 1 .		 All
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?
Yes --> Go To 6
No --> Repair the Sensor Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1 .		 All
6 If there are no possible causes remaining, view repair.
Repair
Replace and program the Body Control Module in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1 .		 All
7 Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
With the DRBIII® in Sensors, read the Evaporator Temperature Sensor voltage.
Is the voltage 4.5 volts or above?
Yes --> Go To 8
No --> Go To 9		 All
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 thermometer 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?
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 .		 All
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?
Yes --> Repair the Evaporator Temperature Sensor Signal circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Go To 10		 All
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?
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		 All
11 If there are no possible causes remaining, view repair.
Repair
Replace and program the Body Control Module in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1 .		 All
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