Diagnostic Test

CHECK THE HVAC MODULE 

Repair 

• Check for any controller software updates if applicable. If an update is available, reprogram the controller with the latest software. If no software updates are available, replace and program the HVAC Module in accordance with the Service Information. Refer to MODULE, A/C AND HEATER, REMOVAL .
• Perform the HVAC VERIFICATION TEST. Refer to HVAC VERIFICATION TEST  .