Diagnostic Test

PERFORM THE A/C COOL-DOWN TEST 

1. The following conditions must be met before running the A/C Cool-Down test.
   • No Powertrain Control Module (PCM) DTCs present.
   • No Communication DTCs present.
   • Condenser cooling fan working properly.
   • No active HVAC evaporator temperature sensor, sun sensor, recirculation, mode, or blend door actuator DTCs present.
   • The refrigerant system must be fully charged.
   • The blower motor must operate correctly in all speeds.
   • The evaporator temperature must be above 12.7°C (55°F).
   • The A/C compressor must be turned off.
   • Blower must be on high.
2. With the scan tool, perform the A/C Cool-Down Test.

   Did the test pass?

   Yes 

   • The problem is not present at this time.
   • Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .

   No 

   • Perform the A/C PERFORMANCE procedure. Refer to DIAGNOSIS AND TESTING . Run the Cool-Down Test after any repairs are performed.