Mazda Training manual - part 280

AIR CONDITIONING 
SG00b - Pre-Test

 

 

SG00b-5

TC070-15-01H

16. Technician A says the accumulator traps liquid refrigerant allowing it time to 
completely vaporize. 
Technician B says if liquid refrigerant reaches the compressor it could be damaged.  
Who is correct? 

a. Technician A 
b. Technician B 
c. Both Technicians 
d. Neither technician 

 
 
 
17. Technician A says small refrigerant leaks are normal and the refrigerant should 
be replaced once a year as a maintenance item.  
Technician B says if the refrigerant has leaked out of an A/C system the technician 
should charge the system with a small amount of refrigerant for leak testing purposes. 
Who is correct? 

a. Technician A 
b. Technician B 
c. Both Technicians 
d. Neither technician 

 
 
 
18. This method of charging an A/C system adds gaseous refrigerant through the 
low-side service valve while the compressor is running. 

a. Liquid charging 
b. Vapor charging 
c.  Both answers a and b 
d.  Neither answer a or b 

 
 
 
19. The component in this illustration divides the A/C system into high and low 
pressure sides, what is it? 

a.  Fixed orifice tube 
b. Expansion valve 
c. Accumulator 
d. Receiver dryer 

AIR CONDITIONING 
SG00b - Pre-Test

 

 

SG00b-6

TC070-15-01H

20. Which statement is true about this 
climate control plenum assembly? 

a.  All air passes through the 

evaporator 

b.  The air is being re-circulated 
c.  The temperature blend door is set 

for max heat 

d.  All the above 

 
 
 
 
 
 

 

 
 
 
 
 
 
 
 
 
   
 
 
 

 

AIR CONDITIONING 
SG01 - Basic System

 

 

SG01-1

TC070-15-01H

 
OBJECTIVES 
 
After completing this section, you will be able to: 

 

 

Describe a refrigeration cycle and what part the components play in the 
cooling process.  

 

Identify major components of a manual A/C system 

 
 
 
Activities To complete this section, you will perform the following activities: 
 

Activity Title/Description 

Location

AC01 

Identifying A/C Components 

Shop 

AC02 

Locating A/C Protection Devices 

Shop 

AC03 

A/C performance Check 

Shop 

AC04 Refrigerant 

Charging 

Shop 

 
 

In this section: 

 

Basic System 

 

A/C Components ...........................................................................................  2 
A/C Unit construction/operation .....................................................................  3 
Evaporator .....................................................................................................  4 
Expansion valve ............................................................................................  4 
Air Mix Door Operation  ..................................................................................  5 
Airflow Mode Door Operation ........................................................................  5 
Air filter function .............................................................................................  6 
A/C compressor .............................................................................................  6 
Condenser  .....................................................................................................  7 
Refrigerant life ...............................................................................................  7 
Spring-lock Coupling  .....................................................................................  8 
Gauge manifold reading  ................................................................................  9 
Refrigerant System Service Warnings (Reference) ....................................... 10 
Refrigerant System Service Cautions ............................................................ 10 
AC abbreviation ............................................................................................. 12 
Item Specification  .......................................................................................... 12 
Review Exercise ............................................................................................ 13 

 
 

NOTE 
This SG: Student Guide is developed based on Mazda 3.

AIR CONDITIONING 
SG01 - Basic System

 

 

SG01-2

TC070-15-01H

 
A/C Components 
 
 

 

 

 

Name the components.