Test step/Test sequence	Test condition	Nominal value	Possible cause/Remedy 1)
1.0 Defrost	Temperature selector wheel in "white range". button indicator lamp is not illuminated. Air distribution dial set at 12 o'clock position (vertical).	Air venting from center vents. Air venting from defroster outlets. A/C compressor engaged.	23 , 32 1.0 - 3.0
2.0 Normal ventilation in regulating mode	Temperature selector wheel in "white range". button indicator lamp is not illuminated. Air distribution dial set at 4 o'clock position.	Air venting from lower and upper outlets. A/C compressor engaged. Tempered air from center air outlet. Duovalve cycles at the same time and coolant circulation pump (M13) runs.	23 11.0 , 12.0 , 14.0 , 15.0 , 16.0 , 17.0 , 18.0
3.0 Economy setting not in heating mode	Temperature selector wheel in "blue range" detent. button indicator lamp is illuminated. Air distribution dial set at 9 o'clock position.	Air venting from center air outlets (ambient temperature) A/C compressor not engaged.	23 11.0 , 14.0 , 15.0
4.0 Economy setting in heating mode	Temperature selector wheel in "red range" detent. button indicator lamp is illuminated. Air distribution dial set at 4 o'clock position.	Heated air venting from lower, upper and center air outlets. A/C compressor not engaged.	23 11.0 , 14.0 , 15.0
5.0 "REST" (residual engine heat utilization mode)	Ignition: OFF Press button. Temperature selector wheel in "red range". Air distribution dial set at 4 o'clock position.	Heated air venting from lower, upper and center air outlets.	23 12.0 , 14.0 , 15.0
6.0 "A/C" Test	See A/C Test section.		51 , 52
7.0 Quality Control and Heater Output Test	See Quality Control and Heater Output Test section.	Special tools	51 , 52 22

1) Observe Preparation for Test, see 22 .