B10B2-A/C COOL DOWN TEST PERFORMANCE (ATC)
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
When the Cooldown 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.
| Possible Causes |
| PREREQUISITES NOT MET BEFORE RUNNING THE TEST |
| ANOTHER RELATED SYSTEM NOT FUNCTIONING CORRECTLY |
| POWERTRAIN SYSTEM FAULTS PRESENT |
Diagnostic Test
1. VERIFY THAT ALL OF THE COOLDOWN TEST PREREQUISITES WERE METReview the list of Cooldown 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 Cooldown Test?
Yes
- Go To 2
No
- Run the Cooldown Test again after all of the prerequisites are met. Then, if DTC B10B2 is still active, Go To 2. Otherwise, Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
2. CHECK FOR DTCs IN THE PCM
With the scan tool, select PCM.
Are any DTCs present in the PCM?
Yes
- Diagnose and repair the DTC(s). (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) for PCM DTCs. Run the Cooldown Test again after the repair is complete.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Refer to the Service Information for additional Cooldown Test related diagnostic information and testing procedures. Run the Cooldown Test again after the repair is complete.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).