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READING ACTUAL VALUES
1. IGNITION : Position 1
2. Set temperature selection to 72 degrees F (Press v and ^ simultaneously).
3. Press the AUTO button.
4. Press the REST button for more than 5 seconds.
5. The display will alternately show the number "01" and the in-car temperature or "LO" if there is an open
circuit or "HI" if there is a short circuit.
6. Press the "Top Air Outlet" button to increase the component tested and the "Bottom Air Outlet" button to
decrease the component number tested.
7. 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 (B10/5)
03 Heater Core Temperature Sensor (B10/1)
05 Evaporator Temperature Sensor (B10/6)
06 Engine Coolant Temperature (ECT) Sensor (A/C) (B10/8)
07 Refrigerant Pressure in Bar
08 Blower Control Voltage
09 Software Status of A/C Pushbutton Control Module
15 Selected In-Car Temperature
20 Version Code
21 Engine Speed in RPM
22 A/C Compressor Speed in RPM
23 Vehicle Speed in km/h
50 Not Used
51 Number of Current Poly-V Belt Slip Recognitions
52 Number of Stored Poly-V Belt Slip Recognitions
FAULT DIAGNOSIS
1 IGNITION : Position 1
2 Press the V button until "LO" appears on the display.
3 Within 20 seconds press the REST and BLOWER buttons simultaneously for more then 2 seconds.
4 The LED in the RECIRCULATE button flashes and "dI R" appears on the display
5 Press the AUTO button until all DTC's are displayed and recorded. Continuous faults are displayed first. if
no faults are stored, "En d" is displayed. Press AUTO again to retrieve intermittent faults. If no intermittent
faults are stored, "En d" is displayed.