Mercedes-Benz CS1000 - Manual (Page 107)

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READING ACTUAL VALUES
1. IGNITION : Position 1
2. Set temperature selector to 72 degrees F.
3. Press the REST button for more than 6 seconds.
4. The left display will alternately show the number "01" and the in-car temperature.
5. Press the FAN button and the next component number and its value will be displayed.
6. Press the REST button to end the test program.
COMPONENT UNDER TEST
Number Component
01 In-Car Temperature Sensor with Aspirator Blower (B10/4)
02 Outside Temperature Sensor (B14)
03 Heater Core Temperature Sensor (B10/1)
05 Evaporator Temperature Sensor (B10/6)
06 Engine Coolant Temperature Sensor (ECT) (B11/4)
07 Refrigerant Pressure in Bar
08 Refrigerant Temperature Sensor (B12/1)
09 Not Used
10 Blower Control Voltage
20 Control Current for Auxiliary Fan exp. : 7 = 7 mA
21 Engine RPM. example 00..99 (x100) = 9900
22 Vehicle Speed
23 PIN 58D exp. 99.0 = 99% of Battery Voltage
24 Battery Voltage : 12.8 = 12,8 Volt
40 A/C Controller Software Version Coding
41 A/C Controller Hardware Version
42 Variant code 1
43 Variant code 2
50 Not Used
51 Not Used
52 Not Used
54 ON/OFF A/C Compressor emergency off signal from engine control module.