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Mazda CX-5 Service & Repair Manual: Seat Warmer System

Purpose

Function


Switch display

Temperature level

Average temperature around seat warmer unit

With manual air conditioner system

With full-auto air conditioner system

Seat cushion side

Seat back side



0



1

Approx. 37°C



2

Approx. 40°C

Approx. 42°C



3

Approx. 42°C

Approx. 47°C



Temperature level

Average temperature around seat warmer unit (seat cushion side)

Cloth type

Leather type

Increase start temperature

Decrease start temperature

Increase start temperature

Decrease start temperature

0

1

Approx.

23°C

Approx.

25°C

Approx.

23°C

Approx.

25°C

2

Approx.

23°C

Approx. 34°C

Approx.

30°C

Approx.

32°C

3

Approx. 42°C

Approx.

44°C

Approx.

38°C

Approx.

40°C


Ex.) Cloth-type temperature level is 3:


Structural view

System wiring diagram


Operation

Ex.) Seat warmer temperature level on cloth-type driver's side is set at 3 (with full-auto air conditioner system):

1. The climate control unit determines (1) the average increase temperature of the seat warmer unit by operating the seat warmer switch (driver-side).

2. The climate control unit sends (2) the temperature level "3" signal for the seat warmer unit to the CPU of the seat warmer control unit.

3. When the CPU of the seat warmer control unit receives the operation level "3" signal from the climate control unit, it supplies the base current to the transistor built into the seat warmer control unit (3), and the gate voltage is applied to the FET simultaneously (4).

4. If the base current is supplied, the transistor supplies collector current to the relay coil (5).

5. If collector current is supplied, the relay coil energizes and turns on the relay switch (6).

6. When the gate voltage is applied, the FET completes the circuit between seat warmer control unit terminal A and ground (7).

7. When the relay switch built into the seat warmer control unit turns on and the FET circuit is completed, the driver-side seat warmer unit circuit is completed (8) and the driver-side front seat cushion and front seat back warm.


Ex.) Seat warmer temperature level on cloth-type passenger-side is set at 3 (with manual air conditioner system):

1. The climate control unit determines (1) the average increase temperature of the seat warmer unit by operating the seat warmer switch (passenger-side).

2. The climate control unit sends (2) the temperature level "3" signal for the seat warmer unit to the CPU of the seat warmer control unit.

3. When the CPU of the seat warmer control unit receives the operation level "3" signal from the climate control unit, it supplies the base current to the transistor built into the seat warmer control unit (3), and the gate voltage is applied to the FET simultaneously (4).

4. If the base current is supplied, the transistor supplies collector current to the relay coil (5).

5. If collector current is supplied, the relay coil energizes and turns on the relay switch (6).

6. When the gate voltage is applied, the FET completes the circuit between seat warmer control unit terminal B and ground (7).

7. When the relay switch built into the seat warmer control unit turns on and the FET circuit is completed, the driver-side seat warmer unit circuit is completed (8) and the driver-side front seat cushion and front seat back warms.


Fail-safe

Seat Warmer Switch Removal/Installation
NOTE: The seat warmer switch are integrated into the climate control unit. (with full-auto air conditioner system) The seat warmer switch are integrated into the clock. (with manual ...

Seat Warmer Unit Inspection
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 befor ...

Other materials:

Outer Mirror Glass Inspection
Heated Outer Mirror 1. Disconnect the negative battery cable.. 2. Remove the outer mirror glass.. 3. Verify that the resistance and continuity between the heated outer mirror terminals is as indicated in the table. If not as indicated in the table, or if the resistance is not with ...

Rear Stabilizer Removal/Installation [2 Wd]
WARNING: Verify that the rear crossmember is securely supported by a jack. If the rear crossmember falls off, it can cause serious injury or death, and damage to the vehicle. CAUTION: Performing the following procedures without first removing the rear ABS wheel-spee ...

Passenger Side Air Bag Module Removal/Installation [Standard Deployment Control System]
WARNING: Handling the air bag module improperly can accidentally deploy the air bag module, which may seriously injure you. Read the air bag system service warnings and cautions before handling the air bag module.. NOTE: When replacing the passenger-side air bag module af ...

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