HVAC

B10B2-A/C COOL DOWN TEST PERFORMANCE

For a complete wiring diagram, refer to the wiring information Electrical Diagrams.

- When Monitored:
When the Cool-down Test is executed.

- Set Condition:
If the A/C system is unable to lower the evaporator temperature 11.11°C (20°F) within two minutes.





1. VERIFY THAT ALL OF THE COOL-DOWN TEST PREREQUISITES WERE MET
1. Review the list of Cool-down Test prerequisites.
- DTCs B1031 and B1032 must not be active.
- The refrigerant system must be adequately charged.
- The blower motor must operate correctly in all speeds.
- The work area ambient temperature must be above 18.3°C (65°F).
- The evaporator temperature must be above 18.3°C (65°F).
- The A/C compressor must be turned off.

Were all of the prerequisites met before running the Cool-down Test?

Yes

- Go To 2

No

- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK FOR DTCs IN THE PCM
1. With the scan tool, select PCM.

Are any DTCs present in the PCM?

Yes

- Diagnose and repair the DTC(s). Testing and Inspection for PCM DTCs. Run the Cool-down Test again after the repair is complete.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Refer to the Service Information for additional Cool-down Test related diagnostic information and testing procedures. Run the Cool-down Test again after the repair is complete.
- Perform the BODY VERIFICATION TEST. Body Verification Test.