Mazda 3 Service Manual: Climate Control Unit Inspection [Manual Air Conditioner]
1. Remove the climate control unit with the connector connected..
2. Switch the ignition to ON.
3. Connect the negative (-) lead of the tester to the body ground.
4. By inserting the positive (+) lead of the tester into the climate control unit connector, measure the voltage according to the terminal voltage table.
-
If there is any malfunction, inspect the parts under “Inspection item(s)”.
-
If the parts under “Inspection item(s)” are normal, replace the climate control unit.
Terminal Voltage Table (Reference)
|
Terminal |
Signal name |
Connected to |
Measurement condition |
Voltage (V) |
Inspection item(s) |
|
1A |
― |
― |
― |
― |
― |
|
1B |
Motor operation |
Air intake actuator |
Switched to RECIRCULATE |
B+ |
|
|
Switched to FRESH |
1.0 or less |
||||
|
1C |
Evaporator temperature sensor input |
Evaporator temperature sensor |
Compared with temperature detected by evaporator temperature sensor |
Refer to graph 1 |
|
|
1D |
― |
― |
― |
― |
― |
|
1E |
― |
― |
― |
― |
― |
|
1F |
Motor operation |
Air intake actuator |
Switched to RECIRCULATE |
1.0 or less |
|
|
Switched to FRESH |
B+ |
||||
|
1G |
Sensor GND |
|
Under any condition |
1.0 or less |
|
|
1H*1 |
+5 V |
Refrigerant pressure sensor |
Switch the ignition to ON |
5 |
|
|
Switch the ignition to Off |
1.0 or less |
||||
|
1I |
Ground |
Body ground |
Under any condition |
1.0 or less |
|
|
1J |
― |
― |
― |
― |
― |
|
1K*2 |
Fan switch position |
Fan switch |
Fan switch position 0, 1 and 2 |
B+ |
|
|
Fan switch position 3 and 4 |
1.0 or less |
||||
|
1L |
Blower fan ON/OFF signal |
Fan switch |
Fan stopped |
B+ |
|
|
Fan on |
1.0 or less |
||||
|
2A |
Illumination (-) |
Instrument cluster |
Headlight ON and panel light control MAX |
2.0 |
|
|
Headlight ON and panel light control MIN |
9.65 |
||||
|
2B |
B+ |
ROOM 15 A fuse |
Under any condition |
B+ |
|
|
2C |
― |
― |
― |
― |
― |
|
2D |
LIN |
BCM |
Because this terminal is for communication, good/no good judgement by terminal voltage is not possible. |
|
|
|
2E |
― |
― |
― |
― |
― |
|
2F |
TNS signal |
TNS relay |
TNS OFF |
1.0 or less |
|
|
TNS ON |
B+ |
||||
|
2G |
― |
― |
― |
― |
― |
|
2H |
IG2 |
HEATER 10 A fuse |
IG SW ON |
B+ |
|
|
IG SW LOCK |
1.0 or less |
||||
|
2I |
― |
― |
― |
― |
― |
|
2J*1 |
Refrigerant pressure sensor signal |
Refrigerant pressure sensor |
Compared with temperature detected by refrigerant pressure sensor |
(See REFRIGERANT PRESSURE SENSOR INSPECTION [MANUAL AIR CONDITIONER].) |
|
|
2K |
Rear window defroster indicator |
BCM |
Rear window defroster OFF |
11.12 |
|
|
Rear window defroster ON |
1.0 or less |
||||
|
2L |
― |
― |
― |
― |
― |
|
2M |
― |
― |
― |
― |
― |
|
2N |
― |
― |
― |
― |
― |
|
2O |
Rear window defroster signal |
BCM |
While pressed rear window defroster switch |
1.0 or less |
|
|
Released rear window defroster switch |
4.7 |
||||
|
2P |
A/C signal |
Instrument cluster |
A/C ON |
1.0 or less |
|
|
A/C OFF |
4.8 |
||||
*1 MZR 2.0, MZR 2.5
*2 SKYACTIV-G 2.0
Climate Control Unit Inspection [Full Auto Air Conditioner]
1. Remove the climate control unit with the connector connected..
2. Switch the ignition to ON.
3. Connect the negative (-) lead of the tester to body ground.
4. By inserting the positive (+) le ...
Climate Control Unit Removal/Installation [Full Auto Air Conditioner]
1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Upper panel.
b. Shift lever knob (MTX).
c. Selector lever knob (ATX).
d. Shift panel.
e. Side wall.
f. Consol ...
Other materials:
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Outline
Auxiliary jack/USB port has been adopted.
USB adapter has been adopted.
An audio unit which supports USB devices such as USB memory or iPods has
been adopted.
911 assist function has been added to the Bluetooth unit.
RDS-TMC (Radio Data System-Traffi ...
Outside rear view mirrors
In the Subaru Solterra, the outside rear view mirrors can be precisely
adjusted to provide a clear and comprehensive view of the surrounding traffic, significantly
improving driving awareness and safety.
■ When using the outside rear view mirrors in a cold weather
During cold weather conditi ...
If a Warning Light Turns On or Flashes
If any warning light turns on/flashes, take appropriate action for each
light. There is no
problem if the light turns off, however if the light does not turn off or turns
on/flashes again,
consult an Authorized Mazda Dealer.
(Vehicles with type B audio)
The warning contents can be verified o ...
