1. The display window will show in sequence the actual temperature readings, refrigerant pressure, blower control voltage and software status of the A/C pushbutton control module (N22). 2. The temperature control is maintained during the duration of the test.
		P83.40-0313-01

Preparation for Test 1. Review 11 , 12, 14 , 15 , 20, 21 , 23 , 31 31 2. Ignition: ON 2. Set temperature selection to °F. 3. Press for more than 6 seconds. 4. The left side of the display window will alternately display the number and the in-car temperature (e.g. °F) 5. By pressing + the next highest test step is displayed (see table). 6. Press to end test program. Note: The display will, or " " if there is an open circuit, " " if there is a short circuit.

Display code in N22 window		Possible cause	Test step/Remedy 1)
		In-car temperature sensor (B10/4)	23 4.0
		Outside temperature indicator temperature sensor (B14)	23 10.0
		Heater core temperature sensor (B10/1)	23 7.0
		Evaporator temperature sensor (B10/6)	23 5.0
		ECT sensor (DFI, IFI) (B11/4)	23 10.0
		Refrigerant pressure in bar, e.g. ° corresponds to 6.4 bar	23 8.0
		Refrigerant temperature sensor (B12/1), e.g, ° corresponds to 73.4 ° F	23 6.0
	-	Not used	-
		Blower control voltage, e.g. ° (min) - ° (max) corresponds to 0.8 - 6.0 volts	23 15.0
	-	Control current for auxliary fan e.g. corresponds to 7 mA	23 11.0
		Engine speed, e.g. . . (x 100) corresponds to 9900 rpm	23 10.0
		Vehicle speed 155 (km/h)	23 10.0
		Terminal 58d e.g. corresponds to 99 % battery voltage	-
	3)	Software status e.g.	-
	3)	Software status e.g.	-
	2)	Version code 1. number code e.g.	-
	2)	Version code 2. number code e.g. diesel/ benzin (gas)	-
	-	not used	-
	-	not used	-
	-	not used	-
		A/C compressor emergency off signal from engine control module	23 10.0
-		Compressor WOT cut-off on diesel engines	-

1) Observe Preparation for Test. 2) Version code menu. 3) Control module identification.