Operation CHARM: Car repair manuals for everyone.

Service Hints

A3 A/C DUAL PRESSURE SW
1-4 : Open above approx. 1520 kPa (220 psi, 15.5 kgf/cm2) or 2646 kPa (384 psi, 27 kgf/cm2)

A18 (A), A20 (C), A21 (D) A/C CONTROL ASSEMBLY
B-GROUND : Always approx. 12 Volts
IG+-GROUND : Approx. 12 Volts with ignition SW at ON position
HR-GROUND : Approx 10-14 Volts with ignition SW at ON position and do not turn the blower motor
Below 1 Volts with ignition SW at ON position and turn the blower motor
ACC-GROUND : Approx. 12 Volts with ignition SW at ACC or ON position
S5-GROUND : 4.5-5.5 Volts with the ignition SW ON
AIF-GROUND : Approx. 10-14 Volts with FRESH SW ON
AIR-GROUND : Approx. 10-14 Volts with RECIRC SW ON
GND-GROUND : Always continuity