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Mazda CX-5 Service & Repair Manual: Climate Control Unit Inspection [Manual Air Conditioner]

Mazda CX-5 Service & Repair Manual / HVAC / A/C / 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 the positive (+) lead of the tester into the climate control unit connector, measure the voltage according to the terminal voltage table.


Terminal Voltage Table (Reference)


Terminal

Signal name

Connected to

Measurement condition

Voltage (V)

Inspection item(s)

A

TNS signal

Front body control module (FBCM)

TNS OFF

1.0 or less

  • Related wiring harness

  • Front body control module (FBCM)

TNS ON

B+

B

Illumination (-)

Instrument cluster

Headlight ON and panel light control MAX

2.0

  • Instrument cluster

  • Related wiring harness

Headlight ON and panel light control MIN

9.65

C

Motor operation

Air intake actuator

Switched to RECIRCULATE

B+

  • Related wiring harness

  • Air intake actuator

Switched to FRESH

1.0 or less

D

Ground

Body ground

Under any condition

1.0 or less

  • Related wiring harness

E

Motor operation

Air intake actuator

Switched to RECIRCULATE

1.0 or less

  • Related wiring harness

  • Air intake actuator

Switched to FRESH

B+

F

Sensor GND

Evaporator temperature sensor

Under any condition

1.0 or less

  • Related wiring harness

  • Evaporator temperature sensor

G

Blower fan ON/OFF signal

Fan switch

Fan stopped

B+

  • Related wiring harness

  • Resistor

  • Fan switch terminal voltage (D)

Fan on

1.0 or less

H

Evaporator temperature sensor input

Evaporator temperature sensor

Compared with temperature detected by evaporator temperature sensor

Refer to graph 1

  • Related wiring harness

  • Evaporator temperature sensor

  • Climate control unit: terminal voltage (F)

I

Blower fan position signal

Fan switch

3rd, 4th

1.0 or less

  • Related wiring harness

  • Resistor

  • Fan switch terminal voltage (D)

off, 1st, 2nd

B+

J

B+

ROOM 15 A fuse

Under any condition

B+

  • Related wiring harness

  • ROOM 15 A fuse

K

LIN

Front body control module (FBCM)

Because this terminal is for communication, good/no good judgment by terminal voltage is not possible.

  • Related wiring harness

  • Front body control module (FBCM)

L

IG2

Front body control module (FBCM)

Switch the ignition to ON

B+

  • Related wiring harness

  • Front body control module (FBCM)

Switch the ignition off

1.0 or less





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 ...

Climate Control Unit Removal/Installation [Full Auto Air Conditioner]
NOTE: The climate control unit prior to replacement stores the vehicle specification information. The new climate control unit does not store any vehicle specification information. ...

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Seat Warmer Control Unit Removal/Installation
WARNING: Handling a side air bag improperly can accidentally operate (deploy) the air bag, which may seriously injure you. Read the service warnings/cautions in the Workshop Manual before handling the front seat (side air bag integrated).. 1. Switch the ignition off (LOCK). 2. ...

Front Door Latch Switch
Purpose, Function Switches on/off in conjunction with the latch lever rotation, and detects the front door open/closed condition by the voltage which is changed by the rear body control module (RBCM). Construction The switch is turned on/off by the rotation of the latch lev ...

Key Cylinder Switch
Purpose The switch turns on/off in conjunction with the front door key cylinder lock/unlock and the rear body control module (RBCM) detects the key cylinder operation condition by the change in the voltage. Function The key cylinder switch contact point changes in conjuncti ...

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