Mazda CX-5 Service & Repair Manual: A/C Cut Off Control [Skyactiv G 2.0]
Outline
-
Controls the A/C operation by switching the A/C relay ON/OFF at the optimal timing according to engine operation conditions. Acceleration performance and A/C compressor reliability have been improved by controlling the A/C operation.
Block Diagram
Operation
-
The PCM stops current to the A/C relay when any of the following conditions are met:
|
Operation condition |
While A/C relay not energized |
Purpose |
|
At engine start |
Approx. 4 s |
Improved startability |
|
When engine speed is 6,700 rpm or more |
Approx. 5 s elapsed since engine speed was 6,200 rpm or less |
A/C compressor reliability assurance |
|
Accelerated |
3 to 5 s |
Acceleration from standstill/acceleration performance improvement |
|
Refrigerant pressure 3.14 MPa {32.0 kgf/cm2, 455 psi} or more |
Refrigerant pressure decreases to 2.55 MPa {26.0 kgf/cm2, 370 psi} or less |
A/C compressor reliability assurance |
|
Refrigerant pressure of 0.196 MPa {2.00 kgf/cm2, 28.4 psi} or less continues for 5 s or more |
Refrigerant pressure of 0.226 MPa {2.30 kgf/cm2, 32.8 psi} or more continues to 5 s or more |
A/C compressor reliability assurance |
|
Drive-by-wire control malfunction |
— |
Reverse driving performance assurance |
|
Panic braking determined |
— |
Load performance assurance |
|
Misfire determination |
— |
Catalytic converter protection |
|
ECT sensor malfunction |
— |
Engine protection |
|
Engine coolant temperature 113 °C {235 °F} or more |
Turns on/off repeatedly every 10 s until engine coolant temperature is less than approx. 107 °C {225 °F} |
Engine protection |
|
Engine coolant temperature 117 °C {243 °F} or more |
Until engine coolant temperature is less than 110 °C {230 °F} |
Engine protection |
A/C Compressor Removal/Installation
1. Disconnect the negative battery cable..
2. Discharge the refrigerant..
3. Remove the front under cover No.2..
4. Remove the drive belt..
5. Disconnect the connector.
6. Remove bolts A ...
A/C Unit
Outline
The A/C unit which integrates the cooling and heater units has been adopted.
Construction
The A/C unit consists of the following parts.
Operation
Air Mix Door Op ...
Other materials:
Precaution
Intermittent Concern Troubleshooting
Vibration method
If a malfunction occurs or becomes worse while driving on a rough road or
when the engine is vibrating, perform the following steps.
NOTE:
There are several reasons why vehicle or engine vibration could cause an
electr ...
Electrical System
Electrical Parts
Battery cable
Before disconnecting connectors or removing electrical parts, disconnect
the negative battery cable.
Wiring Harness
To remove the wiring harness from the clip in the engine room, pry up the
hook of the clip using a flathead screwdriver. ...
Relay And Fuse Block Disassembly/Assembly
1. Insert a tape-wrapped flathead screwdriver into the service hole in the position
shown in the figure.
2. Move the flathead screwdriver in the direction of the arrow (1) shown in the
figure, pull up relay and fuse block No.1 in the direction of the arrow (2) shown
in the figure, and de ...
