Mazda Training manual — part 291

AIR CONDITIONING
SG02 - Control System [Manual Air Conditioning]

SG02-15

TC070-15-01H

A/C Compressor Control

The climate control unit sends an A/C signal to the PCM via the main fuse block and
instrument cluster (PJB and instrument cluster) based on signals sent from the A/C
switch, fan switch and evaporator temperature sensor.
The PCM controls the A/C relay and IAC valve based on the input signal from the
climate control unit and refrigerant pressure switch.

AIR CONDITIONING
SG02 - Control System [Manual Air Conditioning]

SG02-16

TC070-15-01H

Climate control unit inspection (Reference)

1. Turn the ignition switch to the ON position.
2. Connect the negative (-) lead of the tester to body ground.
3. By inserting the positive (+) lead of the tester into each climate control unit terminal,

measure the voltage according to the terminal voltage table.

AIR CONDITIONING
SG02 - Control System [Manual Air Conditioning]

SG02-17

TC070-15-01H

(Cont’d)

AIR CONDITIONING
SG02 - Control System [Manual Air Conditioning]

SG02-18

TC070-15-01H

Technical Data