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Home >> Chrysler >> 2004 >> Pacifica AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Body Diagnostic Procedures - HVAC, Ignition Power Accessory, Instrument Cluster, Interior Lighting, Navigation, Overhead Console, Power Door Locks/RKE >> Heating & A/C >> Symptom: INVALID CONDITIONS FOR COOLDOWN TEST, EVAP TEMPERATURE TOO LOW >> Diagnostic Procedure

Diagnostic Procedure

INVALID CONDITIONS FOR COOLDOWN TEST - DIAGNOSTIC PROCEDURE

TEST ACTION APPLICABILITY
1
CAUTION: The work area ambient temperature must be above 15.6°C (60°F) and the evaporator temperature must be above 12°C (53°F) in order to test A/C system operation.
Start the engine.Press the A/C mode switch off. The Snowflake should not be displayed on the ATC display panel.Set the blower speed to high. Allow the blower to run for 5 minutes to ensure that the Evaporator Temperature Sensor temperature is above 11.6°C (53°F).With the DRBIII®, actuate the AC Cooldown Test.Does the DRBIII® display the INVALID CONDITIONS FOE COOLDOWN TESTfault message?
  1. Yes: Go To 2
  2. No: Perform additional testing as necessary.

    Perform BODY VERIFICATION TEST VER-1 .

 All
2
CAUTION: The work area ambient temperature must be above 15.6°C (60°F) and the evaporator temperature must be above 12°C (53°F) in order to test A/C system operation.
Turn the ignition on.With the DRBIII®, read the active ATC DTCs.Does the DRBIII® display any DTCs?
  1. Yes: Return to the Heating & A/C SYMPTOM LIST and choose the symptom(s). After the repair is complete, with the DRBIII®, erase the DTC(s), then cycle the ignition switch, and then with the DRBIII®, actuate the AC Cooldown Test.

    Perform BODY VERIFICATION TEST VER-1 .

  2. No: Go To 3
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3
CAUTION: The work area ambient temperature must be above 15.6°C (60°F) and the evaporator temperature must be above 12°C (53°F) in order to test A/C system operation.
Turn the ignition on.With the DRBIII®, read PCM DTCs.Does the DRBIII® display any DTCs?
  1. Yes: Refer to POWERTRAIN DIAGNOSTIC PROCEDURES for the related symptom(s). After the repair is complete, with the DRBIII®, erase the DTC(s), then cycle the ignition switch, and then with the DRBIII®, actuate the AC Cooldown Test.

    Perform BODY VERIFICATION TEST VER-1 .

  2. No: Go To 4
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4 Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Turn the ignition on.
With the DRBIII® in Sensor Display, read the Evaporator Temperature Sensor voltage.
Is the voltage above 4.9 volts?
  1. Yes: Go To 5
  2. No: Go To 6
 All
5 Turn the ignition off.
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 DRBIII® in Sensor Display, read the Evaporator Temperature Sensor voltage.
Is the voltage 0.0 volts?
  1. Yes: Replace the Evaporator Temperature Sensor in accordance with the Service Information. After the repair is complete, with the DRBIII®, actuate the AC Cooldown Test.

    Perform BODY VERIFICATION TEST VER-1 .

  2. No: Go To 6
 All
6
NOTE: Ensure that the Evaporator Temperature Sensor harness connector is connected to the Evaporator Temperature Sensor.
NOTE: Ensure that the voltmeter leads meet the terminals in the connector and that there is good terminal to wire connection.
NOTE: Ensure the voltmeter leads are connected for positive polarity.
Back probe the Sensor Ground circuit between the Evaporator Temperature Sensor harness connector and the ATC C1 harness connector.Turn the ignition on.Is the voltage below 0.10 volt?
  1. Yes: Go To 7
  2. No: Repair the high resistance in the Sensor Ground circuit. After the repair is complete, with the DRBIII®, actuate the AC Cooldown Test.

    Perform BODY VERIFICATION TEST VER-1 .

 All
7
NOTE: Ensure that the Evaporator Temperature Sensor harness connector is connected to the Evaporator Temperature Sensor.
NOTE: Ensure the voltmeter leads meet the terminals in the connector and that there is good terminal to wire connection.
NOTE: Ensure the voltmeter leads are connected for positive polarity
Back probe the Evaporator Temperature Sensor Signal circuit between the Evaporator Temperature Sensor harness connector and the ATC C1 harness connector.Turn the ignition on.Is the voltage below 0.10 volt?
  1. Yes: Replace the Automatic Temperature Control (ATC). After the repair is complete, with the DRBIII®, actuate the AC Cooldown Test.

    Perform BODY VERIFICATION TEST VER-1 .

  2. No: Repair the high resistance in the Evaporator Temperature Sensor Signal circuit. After the repair is complete, with the DRBIII®, actuate the AC Cooldown Test.

    Perform BODY VERIFICATION TEST VER-1 .

 All
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