Honda CR-V: System Description

The air conditioning system removes heat from the passenger compartment by transferring heat from the ambient air to the evaporator. The evaporator cools the air with the refrigerant that is circulating through the evaporator. The refrigerant expands in the evaporator, and the evaporator becomes very cold and absorbs the heat from the ambient air. The blower fan pushes air across the evaporator where the heat is absorbed, and then it blows the cool air into the passenger compartment.

Honda CR-V. HVAC (Heating, Ventilation, and Air Conditioning)

This vehicle uses HFC-134a (R-134a) refrigerant, which does not contain chlorofluorocarbons. Pay attention to the following service items:

Oil Separator

Oil emission from the A/C compressor to the A/C line is reduced by placing the oil separator in the A/C compressor.

This results in a thinner oil film inside of the heat exchangers (A/C condenser and evaporator). Air conditioning efficiency is increased without sacrificing engine performance.

Honda CR-V. HVAC (Heating, Ventilation, and Air Conditioning)

A/C Pressure Sensor

The A/C pressure sensor converts A/C pressure into electrical signals to the PCM.

NOTE: The pressures can be monitored using the HDS PGM-FI Data List.

Honda CR-V. HVAC (Heating, Ventilation, and Air Conditioning)

The response of the A/C pressure sensor is shown in the graph.

Honda CR-V. HVAC (Heating, Ventilation, and Air Conditioning)

Heating/Air Conditioning Door Positions

Honda CR-V. HVAC (Heating, Ventilation, and Air Conditioning)

Honda CR-V. HVAC (Heating, Ventilation, and Air Conditioning)

HVAC Control Unit Inputs and Outputs

Honda CR-V. HVAC (Heating, Ventilation, and Air Conditioning)

CONNECTOR A

Honda CR-V. HVAC (Heating, Ventilation, and Air Conditioning)

Circuit Diagram

Honda CR-V. HVAC (Heating, Ventilation, and Air Conditioning)

Honda CR-V. HVAC (Heating, Ventilation, and Air Conditioning)

READ NEXT:

 DTC Troubleshooting

DTC indicator 1: An Open in the Air Mix Control Motor Circuit 1. Start the engine. 2. Turn on the A/C, then set the temperature control dial to Max Hot. 3. Turn the ignition switch OFF and then ON (

 Recirculation Control Motor Circuit Troubleshooting

1. Check the No. 36 (10 A) fuse in the under-dash fuse/ relay box. Is the fuse OK? YES-Go to step 2. NO-Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. 36 (10 A

 Radiator and A/C Condenser Fan Low Speed Circuit Troubleshooting

NOTE: Do not use this troubleshooting procedure if the A/C compressor is inoperative. Refer to the symptom troubleshooting index. Before doing symptom troubleshooting, check for powertrain DTCs.

SEE MORE:

 Fan, Fan Motor, Shroud Removal and Installation

Removal 1. Remove the hood support rod, then use it as shown to prop the hood in the wide-open position. 2. Remove the bulkhead cover. 3. Disconnect the fan motor connectors (A) and hood switch connector (B), then remove the harness clips (C). 4. Remove the radiator upper brackets (A), then remov

 Opening and Closing the Hood

1. Park the vehicle, and set the parking brake. Pull the hood release handle located under the lower left corner of the dashboard. The hood will pop up slightly. 2. Reach in between the hood and the front grille with your fingers. The hood latch handle is above the ‘‘H’’ log

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