Service Hints

A 4 A/C DUAL PRESSURE SW
4-1: Open above Approx. 15.5 kg/cm2 (30 psi, 20 kPa) or 27 kg/cm2 (384 psi, 2648 kPa)

A 3 A/C MAGNETIC CLUTCH
4-Ground: Approx. 3.7 Ohms

A 9-A, A10-C, A11-B A/C AMPLIFIER
+B-Ground: Always Approx. 12 Volts
IG-Ground: Approx. 12 Volts with the ignition SW at ON position
HR-Ground: Approx. 12 Volts with the ignition SW at ON position and do not turn the blower motor
Below 1 Volts with the ignition SW at ON position and turn the blower motor
PSW-: Below 1 Volts with the ignition SW ON
ACC-Ground: Approx. 12 Volts with the ignition SW at ACC or ON position
AC1-Ground: Below 1 Volts at start the engine, operate the compressor
or more Volts at start the engine, do not operate the compressor
BLW-Ground: Below 1.5 Volts with the ignition SW ON and turn the blower motor
S5-SG: 4-6 Volts with the ignition SW ON
SG-Ground: Always continuous
AMH-AMC: 1.3-1.9 Volts with the ignition SW OFF
MFRS-Ground: Approx. 12 Volts with the Fresh SW ON
MREC-Ground: Approx. 12 Volts with the Recirc SW ON
FACE-Ground: Approx. 12 Volts with the Face SW ON
DEF-Ground: Approx. 12 Volts with the Def SW ON
GND-Ground: Always continuity

A15 A/C POWER TRANSISTOR
1-3: Approx. 2.0-2.4 K Ohms