Preparation For Test

DIAGNOSIS - READING SENSOR VALUES

Pushbutton Control Module (N22):

- The display windows (arrows) will show in sequence the actual temperature sensor readings, refrigerant pressure, blower control voltage, software status and control module version. Thereby allowing the tolerance range of the temperature sensors and the refrigerant pressure to be checked.
- The temperature control is maintained during the duration of the test.

Preparation for Test:
1. Set temperature selector wheels to white area.
2. Ignition: ON.
3. Press left and right "AUTO" buttons.
4. Wait at least 20 seconds then press "REST" for more than 5 seconds.
5. The number "1" will appear in the left display window, in the right window the momentary in-car temperature will appear, or, "HI" if there is a short circuit, "LO" if there is an open circuit.
6. By pressing the left "AUTO" button the next value will be displayed in the right window.
7. Press "REST" button to end test program.