Mazda CX-5 Service & Repair Manual: Climate Control Unit Inspection [Full Auto Air Conditioner]
1. Remove the climate control unit with the connector connected..
2. Switch the ignition ON (engine off or on).
3. Connect the negative (-) lead of the tester to body ground.
4. By inserting the positive (+) lead of the tester into each climate control unit terminal, 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 found to be normal (except for terminal 2D), replace the climate control unit.
-
For terminal 2D, first try replacing the power MOS FET. If there is still any malfunction, replace the climate control unit.
Terminal Voltage Table (Reference)
|
Terminal |
Signal name |
Connected to |
Measurement condition |
Voltage (V) |
Inspection item (s) |
|
1A |
— |
— |
— |
— |
— |
|
1B |
— |
— |
— |
— |
— |
|
1C*1 |
Seat warmer switch signal |
Seat warmer control unit |
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. |
|
|
|
1D |
— |
— |
— |
— |
— |
|
1E |
B+ |
ROOM 15 A fuse |
Under any condition |
B+ |
|
|
1F |
Evaporator temperature sensor input |
Evaporator temperature sensor |
Compared with temperature detected by evaporator temperature sensor |
Refer to graph 1 |
|
|
1G |
IG1 |
C/U IG1 15 A fuse |
Switch the ignition to ON |
B+ |
|
|
Switch the ignition off |
1.0 or less |
||||
|
1H |
+5V |
|
Under any condition |
5 |
|
|
1I |
— |
— |
— |
— |
— |
|
1J |
Passenger compartment temperature sensor input |
Passenger compartment temperature sensor |
Compared with temperature detected by passenger compartment temperature sensor |
Refer to graph 2 |
|
|
1K |
— |
— |
— |
— |
— |
|
1L |
— |
— |
— |
— |
— |
|
1M |
— |
— |
— |
— |
— |
|
1N |
Potentiometer input |
Driver-side air mix actuator |
Set temperature at MAX HOT |
4.3 or more |
|
|
Set temperature at MAX COLD |
1.0 or less |
||||
|
1O |
— |
— |
— |
— |
— |
|
1P |
Potentiometer input |
Passenger-side air mix actuator |
Set temperature at MAX HOT |
4.3 or more |
|
|
Set temperature at MAX COLD |
1.0 or less |
||||
|
1Q |
— |
— |
— |
— |
— |
|
1R |
Potentiometer input |
Airflow mode actuator |
VENT |
4.3 or more |
|
|
BI-LEVEL |
3.4 |
||||
|
HEAT |
2.5 |
||||
|
HEAT/DEF |
1.6 |
||||
|
DEFROSTER |
0.7 or less |
||||
|
1S |
MS_CAN_H |
CAN related module |
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. |
|
|
|
1T |
Solar radiation sensor (RH) input |
Solar radiation sensor |
Sunlight shined directly on the solar radiation sensor |
4 |
|
|
Blocking light to solar radiation sensor |
1.0 or less |
||||
|
1U |
MS_CAN_L |
CAN related module |
Because this terminal is for communication, good/no good judgment by terminal voltage is not possible. |
|
|
|
1V |
Solar radiation sensor (LH) input |
Solar radiation sensor |
Sunlight shined directly on the solar radiation sensor |
4 |
|
|
Blocking light to solar radiation sensor |
1.0 or less |
||||
|
1W |
GND |
Body ground |
Under any condition |
1.0 or less |
|
|
1X |
Sensor GND |
|
Under any condition |
1.0 or less |
|
|
2A |
Blower motor feedback |
|
Fan stopped |
B+ |
|
|
Fan: manual 1st |
10.33 |
||||
|
Fan: manual 7th |
0.4 or less |
||||
|
2B |
— |
— |
— |
— |
— |
|
2C |
IG2 |
Front body control module (FBCM) |
Switch the ignition ON (engine off or on) |
B+ |
|
|
Switch the ignition off |
1.0 or less |
||||
|
2D |
Blower fan speed control |
Power MOS FET |
Fan stopped |
1.0 or less |
|
|
Fan: manual 1st |
2.2 |
||||
|
Fan: manual 7th |
9.7 |
||||
|
2E |
Motor operation (HOT) |
Driver-side air mix actuator |
Moving towards HOT |
B+ |
|
|
Moving towards COLD |
1.0 or less |
||||
|
2F |
Motor operation (HOT) |
Passenger-side air mix actuator |
Moving towards HOT |
B+ |
|
|
Moving towards COLD |
1.0 or less |
||||
|
2G |
Motor operation (COLD) |
Driver-side air mix actuator |
Moving towards HOT |
1.0 or less |
|
|
Moving towards COLD |
B+ |
||||
|
2H |
Motor operation (COLD) |
Passenger-side air mix actuator |
Moving towards HOT |
1.0 or less |
|
|
Moving towards COLD |
B+ |
||||
|
2I |
Motor operation (VENT) |
Airflow mode actuator |
Moving towards VENT |
B+ |
|
|
Moving towards DEFROSTER |
1.0 or less |
||||
|
2J |
Motor operation (FRESH) |
Air intake actuator |
Moving towards RECIRCULATE |
1.0 or less |
|
|
Moving towards FRESH |
B+ |
||||
|
2K |
Motor operation (DEFROSTER) |
Airflow mode actuator |
Moving towards DEFROSTER |
B+ |
|
|
Moving towards VENT |
1.0 or less |
||||
|
2L |
Motor operation (RECIRCULATE) |
Air intake actuator |
Moving towards RECIRCULATE |
B+ |
|
|
Moving towards FRESH |
1.0 or less |
||||
*1 With seat warmer.
|
|
|
Climate Control Unit Disassembly/Assembly [Manual Air Conditioner]
1. Disassemble in the order indicated in the figure.
1
Dial
2
Airflow mode wire
(See Wire Removal Note.)
(See Wire Installation Note.)
...
Climate Control Unit Inspection [Manual Air Conditioner]
1. Remove the climate control unit with the connector connected..
2. Switch the ignition ON (engine off or on).
3. Connect the negative (-) lead of the tester to the body ground.
4. By inserting ...
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Tightening torque
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1. If any brake line has been ...
Dashboard Disassembly/Assembly
1. Disassemble in the order indicated in the table.
1
Wiring harness
2
Screw A
3
Screw B
4
Dashboard member
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Screw C
6
Duct No.1
...
Rear Door Speaker Inspection
1. Disconnect the negative battery cable..
2. Remove the rear door trim..
3. Disconnect the rear door speaker connector..
4. Verify that the resistance between the rear door speaker terminals is as indicated
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