Mazda Training manual - part 293

 

  Index      Mazda     Mazda Training Manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  291  292  293  294   ..

 

 

Mazda Training manual - part 293

 

 

AIR CONDITIONING 
05 - Units and Parts Checks

 

 

SG05-2

TC070-15-01H

 
Blower relay 
 
Check continuities Step 1 and 2. 
 

Continuity Step 1: OK / NG 

 

Continuity Step 2: OK / NG 

 
 
Blower motor 
 
Inspect by directly applying battery voltage. 
 

Operation: OK / NG 

 
Resistor 
 
Measure the resistances. 

A – D:                       ohm, Condition OK / NG 

 

A – B:                       ohm, Condition OK / NG 

 

A – C:                       ohm, Condition OK / NG 

 
 
Air intake actuator 
 
Check the air intake actuator for its function by directly applying the battery voltage.  

 

C (B+) – G (Ground): Operation OK / NG 

 

G (B+) – E (Ground): Operation OK / NG 

 
 
Evaporator temperature sensor 
 
Measure the resistance between the evaporator temperature sensor terminals. 
                   

Resistance:                  ohm at               ºC 

 

Resistance:                  ohm at               ºC 

 
 
A/C relay 
 
Check continuities Step 1 and 2. 
 

Continuity Step 1: OK / NG, Continuity Step 2: OK / NG 

 

AIR CONDITIONING 
05 - Units and Parts Checks

 

 

SG05-3

TC070-15-01H

 
Magnetic clutch 
 
Connect battery positive voltage to magnetic clutch terminal A and the A/C 
compressor body to ground. 

 

Operation: OK / NG 

 
 

 
Refrigerant pressure switch 
 
1. Install the manifold gauge. 
2. Disconnect the refrigerant pressure switch connector. 
3. Verify the high-pressure side reading of the manifold gauge and continuity 

between the refrigerant pressure switch terminals. 

 
 

Continuity: OK / NG at               psi 

 

 
Fan switch 
 
Remove the climate control unit. Verify that the continuity between the fan switch 
terminals is as indicated in the table. 
 

Continuity (switch position OFF): OK / NG 

 

Continuity (switch position 1): OK / NG 

 

Continuity (switch position 2): OK / NG 

 

Continuity (switch position 3): OK / NG 

 

Continuity (switch position 4): OK / NG 

 

 

Note 

Refer to the workshop manual to remove the fan switch. 
 

AIR CONDITIONING 
05 - Units and Parts Checks

 

 

SG05-4

TC070-15-01H

 
Climate control unit inspection 
 

Terminal Signal 

name 

Connected 

to 

Measurement 

condition 

Voltage 

(V) 

Remark 

 

B+ 

ROOM 15 A 
fuse 

Under any condition 

 

 

IG SW ON 

 

 

 

IG2 

A/C 10 A fuse
 

IG SW LOCK  
 

 

 

 

GND 

Body ground 

Under any condition 

 

 

 

Sensor GND 

Evaporator 
temperature 
sensor 

Under any condition 

 

 

A/C switch ON, fan 
switch at 1st 

 

 

 

A/C PJB 

 

A/C switch OFF  

 

 

 

Evaporator 
temperature 
sensor input 
 

Evaporator 
temperature 
sensor 
 

Compared with 
temperature detected 
by evaporator 
temperature sensor 

 

 

Rear window 
defroster 
switch ON 

 

 

 
 

Rear 
window 
defroster 
switch 
indicator 
light 

PJB 

Rear window 
defroster 
switch OFF  

 

 

Rear window 
defroster 
switch ON 

 

 

Rear 
window 
defroster 
switch 
 

PJB 
 

Rear window 
defroster 
switch OFF  

 

 

FAN signal 

FAN switch ON 

 

 

 

 

Fan switch 
 

FAN switch OFF  
 

 

 

Headlight switch OFF   

 

TNS signal 

Panel light 
control 
switch 

Headlight switch  
 

 

 

Headlight switch OFF   

 

TNS signal 

PJB 

Headlight switch ON  

 

 

AIR CONDITIONING 
05 - Units and Parts Checks

 

 

SG05-5

TC070-15-01H

 
Instructor Sign-Off: 
Now that you have completed this activity, you should be able to: 

 

Perform checks for A/C components 

This skill will help you evaluate protection devices for correct operation. 
 
Instructor’s initials:   
 
 

 

 

 

 

 

 

 

Content   ..  291  292  293  294   ..