B10B2-00-A/C COOL DOWN TEST PERFORMANCE
B10B2-00-A/C COOL DOWN TEST PERFORMANCE
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
The A/C Heater Controller has software to enable it to perform an A/C Cool Down Test by a command using a scan tool. This test checks for evaporator temperature drop over a predetermined time. If the test fails, this DTC will set. However, certain test conditions are required to perform this test. Failure to run this test within those parameters can result in failure of the test.
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When Monitored:
With ever an A/C Cooldown Test is performed.
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Set Condition:
This DTC is set whenever the A/C Cooldown Test is performed and the desired temperature drop is not achieved by the system. The DTC will go to stored after a successful A/C Cooldown Test.
Possible Causes |
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| A/C SYSTEM WORKING IMPROPERLY |
Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/HVAC - Standard Procedure) .
CONDITIONS FOR A/C COOLDOWN TEST
Are all of the above conditions met before running the A/C Cooldown Test?
Yes
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Go to the Service Information for additional Cooldown Test related diagnostic information and testing procedures and repair as necessary. (Refer to 24 - Heating and Air Conditioning - Diagnosis and Testing)
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NOTE: Run the Cooldown Test again after any repairs are performed. - If the Cooldown Test passes, testing is complete.
No