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 2°C (36°F) 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 2°C (36°F) 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. Liquid tank 5. Refrigerant pressure sensor 6. Evaporator A. Built-in heater & cooling unit assembly Componen ...

    Other materials:

    Precaution for On Board Diagnosis (OBD) System of CVT and Engine
    The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver of a malfunction causing emission deterioration. CAUTION: • Be sure to turn the ignition switch OFF and disconnect the battery cable from the negative terminal before any repair or ...

    Push starting
    Do not attempt to start the engine by pushing. CAUTION • Continuously Variable Transmission (CVT) models cannot be pushstarted or tow-started. Attempting to do so may cause transmission damage. • Three-way catalyst equipped models should not be started by pushing since the three way catalyst ...

    Precaution for Brake System
    WARNING: Clean any dust from the front brake and rear brake using a vacuum dust collector. Never blow by compressed air. • Brake fluid use refer to MA-13, "Fluids and Lubricants". • Never reuse drained brake fluid. • Never spill or splash brake fluid on painted surfaces. Brake fluid ...