Honda Civic/Acura Integra

since 1994 release

Repair and operation of the car

Check of serviceability of functioning and service of systems of heating and air conditioning

Air conditioning system

The air conditioning system constantly is under high pressure. Do not disconnect refrigerator lines at all and do not remove any components of system, previously without having executed a discharge of the last. The discharge of the air conditioning system has to be made by forces of the skilled expert in the conditions of a workshop of car service. At a rassoyedineniye of refrigerator lines surely put on goggles! When replacing components of the air conditioning system the certain amount of replaceable refrigerator oil necessary for filling of volume of new knot will be required. Use only the oil good for the use in the R-134a systems (attentively study the label on a container).

Service

The listed below control checks have to be made on a regular basis for the purpose of maintenance of the air conditioning system in good repair:

   a) Check a condition of a belt of the drive of the compressor. In case of detection of defects or signs of wear make replacement (see the Head Routine maintenance);
   b) Check effort of a tension of a driving belt, in case of need make the corresponding adjustment (see the Head Routine maintenance);
   c) Check hoses of a refrigerator path for existence of cracks, swellings, signs of hardening and aging of rubber. In case of need make replacement;
   d) Check condenser plates for existence of the remains of insects, old leaves and other garbage which got stuck between them. In case of need clean gaps a thin brush, or blow them compressed air;
   e) Check system charge level;

f) At detection of potek of water on rugs in salon under the dashboard pick up the drainage phone of removal of condensate from an evaporator casing (it is located in the bottom forward corner) and a piece of a wire check passability of both openings (see an accompanying illustration).

The air conditioning system has to turn on at least for 10 minutes at least once a month (even in winter season). Long inaction To/in leads to hardening and failure of sealing rings and cuffs of a connecting path.

At inclusion of function of removal of products of frosting the К/В compressor is involved.

In case of violations in work To/in, first of all check serviceability of functioning of a clutch coupling of the compressor (see Check of an electric chain of a clutch coupling of the K/V compressor).

In view of complexity of a design of system and need of use of the special equipment, its service, deep diagnostics and recovery repair lie outside qualification of the average amateur mechanic and have to be made in the conditions of a workshop of car service. Only the elementary checks and replacements which are listed below in the present manual get to competence of the owner of the car.

To/in decrease in level of a charge of refrigerator oil is the most typical cause of infringement of serviceability of functioning. The elementary checks given below will allow to reveal signs of decrease in level of coolant quickly.

Check

PERFORMANCE ORDER

1. Warm up the engine up to the normal working temperature. 2. Include To/in on the maximum refrigerating capacity. Choose the maximum high-speed mode of the fan. Open doors to exclude the closed air circulation in salon. 3. Enter the thermometer into an output air duct via the central deflector on the dashboard (see an accompanying illustration). At included To/in temperature of the air which is going out of the deflector has to lie within 2 °C÷8 of °C. In very hot weather (40 °C), increase in output temperature to 15 °C, but is admissible no more. 4. If the requirements listed in the previous paragraph are not fulfilled, the system means needs charging. For more detailed diagnostics of a condition of system the car should be driven away in a specialized workshop.

Coolant addition

For charging of the air conditioning system of the cars considered in the present manual it is necessary to use only refrigerator R-134a oil.

PERFORMANCE ORDER

1. Prepare the standard charging R-134a set (ask in shops of automobile accessories). The valve nozzle and the piece of a hose connected between the gate and the union of a low pressure part of the refrigerator highway are a part of set a barrel with refrigerator oil (see an accompanying illustration). As one barrel of oil it can appear insufficiently for final charging of system, it makes sense to buy on any case couple at once. Track that at least in one of barrels it was a little tinted in red color that will allow to reveal quickly leak of coolant in case of those. Do not fill more than two barrels of coolant in system at all! 2. According to instructions of manufacturers connect charging set to system. The design of nipple connections allows to make connection of set only to a low pressure part of system. Do not make attempts of connection of set to the union of a high-pressure part of the highway at all! 3. Close the gate on a transitional nozzle and screw the last on a barrel head, previously having made sure available a sealing ring / rubber laying. Surely put on goggles! 4. Remove a dustproof cap from the union of a low pressure part of the refrigerator highway and connect to it the hose of charging set equipped with the socket of bystry joining (see an accompanying illustration). 5. Warm up the engine and include К/В. Track that the hose of charging set did not adjoin to blades of fans of cooling systems of engine/air conditioning. Charging of system has to be made at the working compressor. If the clutch coupling of the compressor is disconnected, the system should be switched to the maximum refrigerating capacity and to open all doors of salon. That the compressor was not switched-off in the course of charging, disconnect the socket from the low pressure switch (on some models the combined switch of a low/high pressure is used) and you peremknit it a paper clip or a piece of a wire. 6. Rotation of a valve nozzle pierce a barrel head, having opened thereby coolant supply (the characteristic sound of the escaping gas has to be heard). In the course of all charging you discipline a barrel vertically, from time to time stirring up it. Between two series do to charging the pause necessary for stabilization of system. 7. In the presence of near at hand exact thermometer enter it in via the deflector into the central air duct To/in and you watch on it temperature of the air given to salon (see the paragraph 3 "Checks"). 8. When the barrel becomes empty, block the gate and disconnect a hose from the low pressure union of system. At once put on a dustproof cap the union. 9. Disconnect a valve nozzle from a barrel, in case of need rearrange it on the second barrel and continue gas station. At the end of the procedure put an unfinished barrel vertically on a rack and as required use it for recharge of system.

System of heating

PERFORMANCE ORDER

1. Moistening of a carpet on a floor under the heater heat exchanger, or a steam-out via deflectors of air ducts is told about leakages of the heat exchanger of a heater. Remove the heat exchanger (see Replacement of the heat exchanger of a heater) and replace it new (the heater heat exchanger is not subject to recovery repair). 2. If the heater does not provide heating of the air given to salon, one of the following can be the reason of such refusal:    a) The thermostat is jammed in open situation that allows given to the heat exchanger of a heater of cooling liquid of the engine to heat up to due temperature;    b) Violation of passability of a cooling path takes place that blocks supply of cooling liquid in the heater heat exchanger. Feel the hoses connected to branch pipes on a back partition of a motive compartment – both of them have to be hot, otherwise passability of a path is broken (hoses, the heat exchanger, or the operating heater valve are blocked). Disconnect hoses and make obratnopotochny the heat exchanger. Previously having disconnected, wash out also both hoses.    c) If it is not possible to restore passability of the heat exchanger by washing, it is necessary to make replacement of the block.