Car heater and air conditioner Honda Civic 5 and 6

Heater — malfunctions, control panel
Malfunctions Symptom chart Note: Check the engine coolant level and allow the engine to warm up before you begin troubleshooting. All faults must be corrected before testing. Since precise measurements are required, use...

Fan assembly
Replacement Note: LHD type shown, RHD type similar. The fan motor, recirculation control motor and fan resistor can be replaced without removing the fan assembly. 1. Remove the glove box. 2. Remove the self-tapping...

Heater unit
Replacement SRS components are located in this area. Review the SRS component locations, precautions, and procedures in the SRS section before attempting repairs or maintenance. Note: LHD type is shown. RHD type is...

Heating control panel
Replacement 1. Remove the driver's side instrument panel lower cover, glove box and lower center panel cover. 2. Disconnect the air flow control cable from the radiator assembly. 3. Remove the rear window defroster...

Heater control panel
Major repairs Replacing the air flow control cable Note: LHD type is shown, RHD type is similar. 1. Cut the inner cable from the cable lock lever side, then remove both pieces of inner cable. 2. Using a sharp knife, cut...

Heater valve cable
Adjustment LHD type: 1. Disconnect the heater valve cable from the valve lever and clamp and from the heater control lever and clamp. 2. Set the temperature control lever to MAX. COOL 3. Turn the heater control lever as...

Air flow control cable
Adjustment LHD type: 1. Disconnect the air flow control cable from the air flow control lever and clamp. 2. Set the temperature control lever to MAX. COOL. 3. Turn the air flow control lever as shown, then attach the...

Mode Control Engine
Examination 1. Disconnect the 7K connector from the mode control motor. 2. Connect the battery (+) to terminal #1 and ground terminal #7. Caution: Never connect the battery in the opposite direction. 3. Using the jumper...

Recirculation control motor
Examination 1. Disconnect the 4K connector from the recirculation control motor. 2. Connect the battery (+) to terminal No.1 and ground terminals No.2 and No.4, the recirculation control motor should run smoothly....

Relay — check
There should be continuity between pins #1 and #3 when power and ground are connected to pins #2 and #4 and there should be no continuity when power is disconnected.

Heater operating mode switch
Examination Check the continuity between the terminals according to the table below.

Heater Fan Switch
Examination Check the conductivity between the contacts according to the table below.

Damper position switch
Examination Check the continuity between the terminals according to the table below.

A/C filter
Replacement 1. Remove the filter cover and pull out the A/C filter. Replace the A/C filter every 30,000 km or 12 months, whichever comes first. 2. Install in the reverse order of removal. Make sure there is no air...

Air Conditioner — Description
Location of main elements The drawings shown are for left-hand drive. Right-hand drive - the layout is symmetrical. Location of connectors and wire harnesses Description Review The air conditioning system removes heat...

Thermostat A/C
Trial Connect the (+) power supply to terminal ±3, ground terminal ±2, and connect a test light between terminals ±1 and ±3. Note: Use a 12V, 3-18W bulb. Submerge the A/C thermostat in a glass of ice water and check the...

A/C switch
Trial Check the conductivity between the contacts according to the table below.

Relay — test
There should be continuity between pins ±1 and ±3 when pins ±2 and ±4 are connected to power and ground, and there should be no continuity when disconnected.

A/C filter — replacement
Replacement 1. Remove the glove box and glove box frame. 2. Remove the evaporator cover and take out the A/C filter. Replace the A/C filter every 30,000 km or 12 months, whichever comes first. 3. Install the parts in...

A/C Maintenance Notes and Cautions
This A/C system uses HFC-134a refrigerant (R-134a) and refrigeration oil (PAG) brand (Nippondenso: ND-OILB, P/N 39899-PR7 003 or P/N 38899-PR7-A01, or SP-10 brand. P/N-38899-P13-003 or P/N 38899-P13-A01, designed for...

Evaporator — replacement, major repair
Replacement Note: LHD type shown, RHD type is similar. 1. Remove the battery. 2. Release the refrigerant. 3. Remove the bolts and disconnect the lines from the evaporator. Note: Close the line openings immediately after...

Compressor (Nippondenso)
Replacement Note: LHD type shown, RHD type is similar. 1. If the compressor has some capacity, start the engine at idle speed and let the air conditioner run for a few minutes, then turn off the engine. 2. Disconnect...

A/C compressor belt
Adjustment The deflection method 1. Apply a force of 98 N (10 kgf) and measure the belt deflection between the compressor and crankshaft pulleys. A/C Compressor Belt Used belt, engines B16A2, B16A4, B16A6: 6.0-9.5 mm...

Charging the air conditioner
Note: Use only the HFC-134a (R-134a) sensor kit. Use a vacuum pump adapter with a built-in one-way valve to prevent oil from the pump from entering the system. Warning When working with refrigerant HFC-134a (R-34a):...

Checking for leaks
Note: Use only the HFC-134a (R-134a) sensor kit. Use a vacuum pump adapter with a built-in one-way valve to prevent oil from the pump from entering the system. Warning When working with refrigerant HFC-134a (R-134a):...

Climate control system — malfunctions
Self-diagnosis function The microclimate control unit has a built-in self-diagnostic system. Operation of the self-diagnosis function Turn the ignition key to the ON (II) position, press the AUTO and OFF buttons...

Microclimate control unit
Replacement 1. Remove the driver's side instrument panel lower cover, glove box and center instrument panel lower cover. 2. Remove the rear window defroster switch, hazard warning switch and receiver/player. 3....

Internal temperature sensor
Replacement 1. Remove the lower instrument panel cover on the driver's side, then disconnect the 2K connector of the internal temperature sensor and the air hose. 2. Remove the two self-tapping screws and the internal...

External temperature sensor
Replacement 1. Disconnect 2K external temperature sensor at once. 2. Press the latch and remove the external temperature sensor. 3. The installation procedure is the reverse of the removal procedure. Trial Compare the...

Sunlight sensor
Replacement 1. Remove the sun sensor from the instrument panel and disconnect the 2K connector. Note: Be careful not to damage the panel. 2. The installation procedure is the reverse of the removal procedure. Trial Turn...

Air mixture control motor
Replacement 1. Disconnect the 5K connector from the air mixture control motor. 2. Remove the three self-tapping screws, the air mixture adjustment motor and the flange bushing. 3. Install the parts in the reverse order...

Evaporator temperature sensor
Trial Compare the resistance between contacts #1 and #2 of the sensor with that indicated on the graph, at the corresponding temperature. The resistance should be close to that indicated. Note: Immerse the sensor in...

Power transistor
Trial 1. Disconnect the 5K power transistor connector. 2. Remove pin #5 with light green/red wire from the connector, then connect 1.2-3.4W bulb to sockets #3 and #5 of the connector as shown. 3. Reconnect the 5K power...

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Civic 8 (2005-2011)

Civic 7 (2000-2005)