Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 155 Factory Service Manual (1992-1998)65 · Heating and ventilation
65 · Heating & A/C

Control panel and air conditioning system check.

Make
Alfa Romeo
Model
155 Factory Service Manual
Year
1992–1998
Section
Self-diagnosis › Control panel and air conditioning system check.
Heating and ventilationControl panel and air conditioning system check.

NOTE: One of two versions of the heating-ventilation control unit may be fitted (A or B) and are interchangeable. They differ only in relation to the indications given in the following diagnosis.

For a preliminary identification of the control unit, refer to the initialization procedure (password) of the ALFA ROMEO TESTER.

The following automatic diagnosis makes it possible to check the operation of the sensors, actuators, control unit and control buttons of the air conditioning system on the TEMP and AIR displays without requiring interventions on the vehicle.

The codes which may appear, depending on the type of check carried out, are ordered successively, in the lines below, from a minimum value of 0 to a maximum of FF. Thus: C5 is higher than BF and lower than d1.

0 1 2 3 4 5 6 7 8 9 A B C D E F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23
24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 40 41 42 43 44 45 46 47
48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F 80 81 82 83 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF FA FB FC FD FE FF

CONTROL PANEL AND AIR CONDITIONING SYSTEM CHECK.

The buttons and displays on the control panel and the check regarding the air conditioning system are given below in accordance with the indications given in the following illustration.

Control panel diagram with labeled parts 1 to 15
  1. "EXT" Button
  2. "TEMP" display
  3. "TEMP +" Button
  4. "TEMP -" Button
  5. "AIR" display
  6. "AIR +" Button
  7. "AIR -" Button
  8. "AUTO" Button
  9. "ECON" Button
  10. "VENT" Button
  11. "RIC" Button
  12. "BI-LEVEL" Button
  13. "OFF" Button
  14. "FLOOR" Button

If the indications on the displays do not correspond to those indicated below, refer to section 26 of the "REPAIR INSTRUCTIONS - ELECTRICAL-ELECTRONIC DIAGNOSIS - FAULT DIAGNOSIS - HEATING AND VENTILATION - AUTOMATIC AIR CONDITIONER.

Parts & tools for this job For 1992 Alfa Romeo 155

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