Diagnostic Test

CHECK FOR ACTIVE DTC 

1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
2. Record the Environmental Data.
3. With the scan tool, erase all DTCs.
4. Turn the ignition off for a minimum of 10.0 seconds.
5. Turn the ignition on.
6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
7. With the scan tool, read DTCs.

   Did the DTC return?

   Yes 

   • Replace the HVAC Module in accordance with the Service information. Refer to MODULE, HVAC, REMOVAL .
   • Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST  .

   No 

   • The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct the pin tension. If no problems are found, test complete.
   • Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST  .