Note : The Test Condition(s) can be performed on the driver or passenger side controls or also the rear controls on vehicles equipped with rear A/C.

Test step/Test scope	Test condition	Nominal value	Possible cause/Remedy 1)
1.0 Defrost	Temperature selector wheel at random setting. Press button . Fan speed wheel set to .	Blower runs with increased speed. Air venting from upper outlets. A/C compressor engaged. Maximum heat output. Charcoal filter off, 100% fresh air.	23 1.0 , 13.0 , 30.0
2.0 Total ventilation in cooling mode	Temperature selector wheels in "blue" area. Press . Fan speed wheel set to .	Blower runs with increased speed. Air venting from center outlets. A/C compressor engaged. No heat output.	23 13.0 , 30.0 33 /2
3.0 Normal ventilation in regulating mode	Temperature selector wheel set at present in-car temperature. Press . Fan speed wheel set to .	Blower speed decreases. Air venting from lower outlets, leak air from upper outlets. A/C compressor engaged. Tempered air exhaust. Simultaneous cycling of duovalve and auxiliary coolant pump.	23 13.0 , 25.0 , 26.0 , 27.0 , 36.0 33 /2, 3
4.0 Center air outlet "warm"	Temperature selector wheels in "red" area. Press warm air switch on center outlet. Fan speed wheel set to .	Heated air from center outlets. Blower speed increases.	23 13.0 , 15.0 , 16.0 33 /3
5.0 Center air outlet "cool"	Temperature selector wheels in "red" area. Press cool air switch on center outlet. Fan speed wheel set to . Press button.	Cool air from center outlet.	23 13.0 , 15.0 , 16.0 33 /3
6.0 Economy in heating mode	Temperature selector wheels in "red" area. Press button. Fan speed wheel set to .	Air venting from lower and side outlets, leak air from upper outlets. Maximum heat output.	23 13.0 , 33 /2, 3

1) Observe Preparation for Test, see 22 .

Note: VEHICLES WITH REAR A/C
Press both buttons, fan speed wheel set to , both temperature selector wheels set in "white" area BEFORE proceeding with Test Conditions

Test step/Test scope	Test condition	Nominal value	Possible cause/Remedy 1)
7.0 Rear A/C ON	Both temperature selector wheels in "white" area. Ensure that the rear A/C fan speed wheel is not set to "0" (Off). Push air distribution slide to the top.	No air venting from beneath seat outlets. Rear A/C blower running. Air venting from outlets.	23 32.0 , 36.0 , 44.0
8.0 Cooling operation	Ensure that the rear A/C fan speed wheel is not set to "0" (Off). Set both temperature selector wheels to "blue" detent. Push air distribution slide to the top. Push air distribution slide to the bottom.	Rear A/C blower running. Cool air venting from outlets. Cool air venting from beneath seat outlets.	23 32.0 , 37.0 , 38.0 , 39.0
9.0 Heating operation	Ensure that the rear A/C fan speed wheel is not set to "0" (Off). Set both temperature selector wheels to "red" detent. Push air distribution slide to the top. Push air distribution slide to the bottom.	Rear A/C blower running. Warm air venting from outlets. Warm air venting from beneath seat outlets.	23 32.0 , 37.0 , 38.0 , 39.0 , 40.0 , 41.0 , 42.0
10.0 Full heat operation	Temperature selector wheels front A/C panel set to "red" detent. Ensure that the rear A/C fan speed wheel is not set to "0" (Off). Set both temperature selector wheels to "red" detent. Push air distribution slide to the top.	Rear A/C blower running. Warm air venting from beneath seat outlets and from console outlets.	23 32.0 , 37.0 , 38.0 , 39.0 , 40.0 , 41.0 , 42.0 , 44.0

1) Observe Preparation for Test, see 22 .