Mazda 626 - Page 549

CONTROL SYSTEM
A/C switch
• The A/C switch inspection is the same as that of the current 626 model. (See 626 Workshop Manual
1577-10-97D.)
Fan switch
• The fan switch inspection is the same as that of the current 626 model. (See 626 Workshop Manual
1577-10-97D.)
Full-logic Type
1. Slide out the climate control unit toward you with the connector still connected.
2. Turn the ignition switch to ON position.
3. Measure the voltage at each climate control unit terminal and refer to the terminal voltage list.
4. Disconnect the climate control unit connector before inspecting for continuity at terminal 1K.
• If not as specified, inspect the parts listed under ’’Action.”
• If the inspection area is okay, replace the body of climate control unit.
Terminal voltage list (Reference) _______________________________________________________
a
n
1K 11 1G
*
*
1A
1L
1J
*
★
1D
1B
n
JSL
n
*
2M
*
2I
*
2E
*
2A
★
2N
*
2J
2H 2F 2D
2B
CLIMATE CONTROL UNIT CONNECTOR
(VIEW FROM HARNESS SIDE)
Terminal Signal
Connected
to
Test condition
Voltage (V)/
Continuity
Actlon
1A IG2
A/C 15A
fuse
Ignition switch at ON position B+
• Inspect related harness
• Inspect A/C 15 A fuse
Ignition switch at LOCK position 0
1B Motor drive
Air mix
actuator
Moving to HOT
0
• Inspect related harness
• Inspect air mix actuator
Moving to COLD 10.5
1D
Motor drive
Airflow
mode
actuator
Moving to DEFROSTER 10.5
• Inspect related harness
• Inspect airflow mode
actuator
Moving to VENT 0
1G
Power
supply
ROOM 10 A
fuse
Under any condition B+
• Inspect related harness
• Inspect ROOM 10 A
fuse
11
Potentiomete
r GND
• Air mix
actuator
• Airflow
mode
actuator
Under any condition
0
• Inspect related harness
• Inspect air mix actuator
• Inspect airflow mode
actuator
• Inspect terminal
voltage climate control
unit (1K)
1J
Motor drive
Airflow
mode
actuator
Moving to VENT
10.5
• Inspect related harness
• Inspect airflow mode
actuator
Moving to DEFROSTER 0
1K GND GND
Under any condition : inspect for
continuity to ground
Yes
-
1L Motor drive
Air mix
actuator
Moving to COLD 0
• Inspect related harness
• Inspect air mix actuator
Moving to HOT
10.5
2A
A/C
Fan switch
Fan switch is ON 0
• Inspect related harness
• Inspect fan switch
Fan switch is OFF B+
2B Motor drive
Air intake
actuator
Moving to RECIRCULATE 0
• Inspect related harness
• Inspect air intake
actuator
Moving to FRESH
B+
2D A/C
A/C
amplifier
A/C switch and fan switch are ON
0
• Inspect related harness
• Inspect A/C amplifier
Other
B+
U-15