Diagnostic Test

CHECK THE A/C HEATER CONTROL 

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 A/C Heater Control in accordance with the Service Information. Refer to CONTROL, A/C AND HEATER, REMOVAL .
• Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .