Mazda TTCC007700--1155--0011H Student Manual page 54

AIR CONDITIONING
SG02 - Control System [Manual Air Conditioning] 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.
SG02-16