Nissan Juke Service and Repair Manual : System

System Diagram

System Description


System Description

REFRIGERANT CYCLE

Refrigerant Flow
The refrigerant from the compressor, flows the condenser with liquid tank, the evaporator, and returns to the compressor. The refrigerant evaporation in the evaporator is controlled by an expansion valve.

Freeze Protection

Automatic air conditioner When intake sensor detects that evaporator surface temperature is 2C (36F) or less, A/C auto amp.

requests BCM to turn the compressor OFF.

BCM requests ECM to turn the compressor to OFF by the signal from A/C auto amp., and ECM makes A/C relay to OFF, and stops the compressor.

Manual air conditioner
When thermo control amp. detects that evaporator surface temperature becomes 2C (36F) or less, BCM requests ECM to turn the compressor OFF, and stops the compressor.

REFRIGERANT SYSTEM PROTECTION

Refrigerant Pressure Sensor The refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure sensor, installed at the condenser exit. The refrigerant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the ECM if the system pressure rises above, or falls below the specifications.

ECM turns the A/C relay to OFF and stops the compressor when the high-pressure side detected by refrigerant pressure sensor is following conditions;

- Approximately 3,120 kPa (31.2 bar, 31.8 kg/cm2, 452 psi) or more (Engine speed is less than 1,500 rpm.) - Approximately 2,740 kPa (27.4 bar, 27.9 kg/cm2, 397 psi) or more (Engine speed is 1,500 rpm or more.)
- Approximately 120 kPa (1.2 bar, 1.2 kg/cm2, 17 psi) or less

Pressure Relief Valve The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.

The release port on the pressure relief valve automatically opens and releases refrigerant into the atmosphere when the pressure of refrigerant in the system increases to an unusual level [more than 3,800 kPa (38 bar, 38.8 kg/cm2, 551 psi)].

    Component parts
    Component Parts Location 1. Expansion valve 2. Condenser 3. Compressor 4. Refrigerant pressure sensor 5. Liquid tank 6. Evaporator A. Built-in heater & cooling unit assembly Componen ...

    Other materials:

    B2581, B2582 intake sensor
    DTC Logic DTC DETECTION LOGIC NOTE: If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to HAC- 51, "DTC Logic". If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. HAC-52, "DTC Logic ...

    P1572 ASCD brake switch
    DTC Logic DTC DETECTION LOGIC NOTE: If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to EC-683, "DTC Logic". This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not stored in ECM memory ...

    Evaporative emission system
    Inspection 1. Visually inspect EVAP vapor lines for improper attachment and for cracks, damage, loose connections, chafing and deterioration. 2. Check EVAP canister as follows: a. Block port (B). Orally blow air through port (A). Check that air flows freely through port (C). b. Block port (A ...