Service Hints

A4 A/C DUAL PRESSURE SW
1-4: Open with the refrigerant pressure at less than approx. 2.0 kgf/sq.cm (31 psi, 196 kPa) or more than approx. 32 kgf/sq.cm (455 psi, 3138 kPa)

C12 (A), C13 (B), C14 (C) A/C ECU [COMB. METER ECU]
B-GROUND: Always approx. 12 Volts
B2-GROUND: Always approx. 12 Volts
AIF-GROUND: Approx. 12 Volts with the FRESH SW ON
AIR-GROUND: Approx. 12 Volts with the RECIRC SW ON
E2-GROUND: Always continuity