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:
No.27 Fuel Refill Concerns
27
FUEL REFILL CONCERNS
DESCRIPTION
Fuel tank does not fill smoothly.
POSSIBLE CAUSE
PCM DTC is stored.
Non-return valve malfunction
Pressure control v ...
A/C Unit Removal/Installation
1. Disconnect the negative battery cable..
2. Discharge the refrigerant..
3. Drain the engine coolant..
CAUTION:
If moisture or foreign material enters the refrigeration cycle, cooling ability
will be lowered and abnormal noise or other malfunction could occur. Always
plug open f ...
Rear Wiper Motor Inspection
1. Disconnect the negative battery cable..
2. Open the liftgate.
3. Remove the following parts:
a. Rear wiper arm and blade.
b. Liftgate upper trim.
c. Liftgate side trim.
d. Liftgate recess.
e. Liftgate lower trim.
4. Remove the rear wiper motor connector.
Rear Wiper Motor Ope ...
