| Interface Diagram |

Description This system maintains the density of carbon dioxide constantly in vehicle interior by measuring the amount of carbon dioxide to increase the comfortableness and the fuel consumption rate when air conditioning system is operating.
Replacement 1. Disconnect the negative (-) battery terminal. 2. Remove the crash pad under cover [RH]. (Refer to Body - "Crash Pad Under Cover") 3.
Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the head up display bezel (A). 3. Remove the instrument cluster. (Refer to Indicators And Guages - "Instrument Cluster") 4. Remove the head up display unit bracket (A) after loosening the mounting nuts.
Self Diagnosis 1. Self-diagnosis process 2. How to read self-diagnostic code After the display panel blinks three times every 0.5 second, the corresponding fault code blinks on the setup temperature display panel every 0.5 second and will show two figures.