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:
Tweeter Inspection
1. Disconnect the negative battery cable..
2. Remove the side speaker grille..
3. Remove the tweeter..
4. Verify that the resistance between the tweeter terminals is as indicated in
the table.
If not as indicated in the table, replace the tweeter.
Without Bose®
With B ...
Drive Belt Inspection [Skyactiv G 2.0]
Generator Drive Belt
NOTE:
The generator drive belt deflection/tension inspection is not necessary with
the adoption of the drive belt auto tensioner.
1. Verify that the indicator part of the cast hexagon on the drive belt auto
tensioner is within the normal range.
If ...
DSC HU/CM
Outline
A high reliability, reduced size and weight DSC HU/CM, integrating both the
DSC HU and the DSC CM, has been adopted.
DSC HU Part Purpose/Function
According to DSC CM signals, the DSC HU controls (on/off) each solenoid valve
and the pump motor, adjusts fluid pr ...
