Honda CIVIC 10G 2016 Hvac Page 1

A/C Service Tips and Precautions
Compressed air mixed with the HFO-1234yf (R-1234yf) forms a combustible vapor.
The vapor can burn or explode causing serious injury.
Never use compressed air to pressure test HFO-1234yf (R-1234yf) service equipment or vehicle air conditioning systems.
Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.
Be careful when connecting service equipment.
Do not breathe refrigerant or vapor.
The air conditioning system uses HFO-1234yf (R-1234yf) refrigerant and polyolester (POE)
refrigerant oil.
Use only service equipment that is U.L.-listed and is certified to meet the requirements of SAE J639 to remove R-1234yf from the air
conditioning system.
If accidental system discharge occurs, ventilate the work area before resuming service.
R-1234yf service equipment or vehicle air conditioning systems should not be pressure tested or leak tested with compressed air.
A
dditional health and safety information may be obtained from the refrigerant and lubricant manufacturers
.
NOTE:
The following label is found under the hood.
The following illustration is an example. The value and the oil type of the actual vehicle may vary depending on the model.
Symbol Symbol name
Caution
A/C Service Tips and Precautions 3195 http://techinfo.honda.com/rjanisis/pubs/sm/1/2/Contents/enu/61TBAD/...
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Contents Summary of Hvac

  • Page 1A/C Service Tips and Precautions Compressed air mixed with the HFO-1234yf (R-1234yf) forms a combustible vapor. The vapor can burn or explode causing serious injury. Never use compressed air to pressure test HFO-1234yf (R-1234yf) service equipment or vehicle air conditioning systems. Air conditionin
  • Page 2Symbol Symbol name Inflammable refrigerant cardiagn.com
  • Page 3Symbol Symbol name Requires properly trained technician to service mobile A/C systems A/C system Always disconnect the negative cable from the 12 volt battery whenever replacing air conditioning parts. Keep moisture and dirt out of the system. When disconnecting any lines, plug or cap the fittings i
  • Page 4A/C Service Tips and Precautions Compressed air mixed with the R-134a forms a combustible vapor. The vapor can burn or explode causing serious injury. Never use compressed air to pressure test R-134a service equipment or vehicle air conditioning systems. Air conditioning refrigerant or lubricant vap
  • Page 5A/C System Description - Overview The air conditioning system regulates temperature air outlet by mixing cold and warm air in an appropriate ratio. The heater core and evaporator core are installed in the heater unit that has the air mix control damper and the mode control damper. The blower unit is
  • Page 6cardiagn.com Refrigerant Cycle NOTE: This illustration is an example only. The appearance and structure of the actual parts may vary depending on the model.
  • Page 7A/C System Description - A/C Pressure Sensor The A/C pressure sensor is attached to the discharge line on the inlet side of the A/C condenser. The sensor's output voltage changes in response to changes in A/C discharge pressure. The PCM receives the voltage signal and is used to drive the A/C compre
  • Page 8A/C System Description - Compressor A/C Compressor The A/C compressor is a pump that compresses refrigerant. It is driven by the engine accessory drive belt. When the compressor clutch is OFF, the pulley and armature plate are disconnected and the A/C compressor does not operate. When the compressor
  • Page 9A/C System Description - Condenser Sub Cool Cycle Condenser System The condenser and receiver/dryer are integrated. The main A/C condenser changes the high pressure and high temperature refrigerant vapor from the A/C compressor into a high pressure and high temperature liquid. This allows the refrig
  • Page 10A/C System Description - Evaporator Temperature Sensor The evaporator temperature sensor is a clip-type thermistor, with a sensing element that is directly mounted to the evaporator core fins. The sensor is connected to the climate control unit and constantly monitors the evaporator temperature. The
  • Page 11A/C System Description - In-Car Temperature Sensor The in-car temperature sensor is attached to the center face of the dashboard and reads in-car temperature. The sensor uses a chip type thermistor-type temperature sensor that decreases resistance when temperature rises and increases resistance when
  • Page 12A/C Compressor Clutch Check 1. A/C Compressor Clutch Clearance - Check 1. Check the armature plate (A) for discoloration, peeling, or other damage. If there is damage, replace the clutch set. 2. Check the pulley (B) bearing play and drag by rotating the pulley by hand. Also check for grease leakage
  • Page 131. Measure the resistance of the field coil. If resistance is not within specifications, replace the field coil. Field Coil Resistance: 3.35-3.61 Ω at 68 °F (20 °C) cardiagn.com 3. A/C Compressor Clutch Oil Leak Check 1. Remove the armature plate, and inspect the armature plate and pulley friction s
  • Page 14A/C Compressor Clutch Overhaul Special Tool Required Image Description/Tool Number A/C Compressor Kit 07AAF-000A150* Delphi A/C Clutch Adapter 07AAC-TBAA100* cardiagn.com *These tools are available through the Honda Tool and Equipment Program; call 888-424-6857. NOTE: Where icon is shown, click for
  • Page 15cardiagn.com Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) Replace 1. A/C Compressor Armature Plate - Remove 1. Remove the center bolt (A) while holding the armature plate (B) with the A/C clutch holder (C).
  • Page 16cardiagn.com 2. Remove the armature plate and the shim(s) (D). NOTE: The shims are available in three thicknesses: 0.3 mm, 0.4 mm, and 0.5 mm. Do not pry on the armature plate with screwdrivers or similar tools. Prying damages the armature plate and the pulley. Inspect the armature plate and pulley
  • Page 172. Remove the pulley (A). NOTE: Do not hammer or pry on the pulley to remove it. Using a hammer damages the A/C compressor. If the pulley is difficult to remove, use a commercially available pulley removing tool. Make sure the jaws of the pulling tool engage the back face of the pulley, not the pull
  • Page 18A/C Compressor Relief Valve Removal and Installation NOTE: If the A/C compressor relief valve released refrigerant to the atmosphere, determine and correct the cause of the excessive system pressure, then replace the relief valve. Plug the opening to keep moisture and foreign material from entering
  • Page 19A new O-ring should be used at each fitting. Prior to installation, apply a thin coat of the same refrigerant oil used in the A/C compressor. Be sure to use the correct O-ring for refrigerant types to avoid leakage. Charge the system with the specified amount of refrigerant. cardiagn.com
  • Page 20A/C Compressor Removal and Installation NOTE: Where icon is shown, click for further information. Review the A/C refrigerant oil replacement before doing repairs or service. Do not install the A/C compressor into a system unless you are completely sure that the system is free of contamination. Insta
  • Page 21Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) Replace 2 Detailed information, notes, and precautions cardiagn.com Torque: N·m (kgf·m, lbf·ft) 3 Type-R
  • Page 22cardiagn.com Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) Replace 4 Type-R
  • Page 23cardiagn.com Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) 5 For some models
  • Page 24Detailed information, notes, and precautions cardiagn.com Torque: N·m (kgf·m, lbf·ft) Replace 6 For some models
  • Page 25cardiagn.com Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) 1. A/C Refrigerant - Recover 2. Drive Belt - Remove 3. Engine Undercover - Remove 4. A/C Condenser Fan Shroud Assembly - Remove (Type-R) 5. Charge Air Cooler Inlet Hose - Remove (Type-R) 6. Discharge Hose and Sucti
  • Page 267. A/C Compressor - Remove Note for installation If you are installing a new A/C compressor, you must calculate the amount of refrigerant oil to be removed from it. A new A/C compressor comes with a full charge of oil. 8. All Removed Parts - Install 1. Install the parts in the reverse order of remov
  • Page 27A/C Compressor Variable Capacity Control Solenoid Test 1. A/C Compressor Variable Capacity Control Solenoid - Test 1. Measure the resistance between A/C compressor clutch 3P connector terminals No. 2 and No. 3. If the resistance is not within specifications, replace the A/C compressor. Variable Capa
  • Page 28A/C Condenser Removal and Installation NOTE: Where icon is shown, click for further information. Review the A/C refrigerant oil replacement before doing repairs or service. Be careful not to damage the radiator and A/C condenser fins, and the receiver line when removing the A/C condenser. Apply to t
  • Page 29Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) Replace 2 Type-R cardiagn.com Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) Replace
  • Page 303 For some models cardiagn.com Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) Replace 1. A/C Refrigerant - Recover (With A/C) 2. Front Grille Cover - Remove
  • Page 313. Front Bumper - Remove 4. Front Bumper Upper Beam - Remove 5. Front Bumper Middle Induction Plate - Remove (If equipped) 6. Discharge Hose - Disconnect (With A/C) 7. Charge Air Cooler Bracket - Remove (Type-R) cardiagn.com 8. Charge Air Cooler - Move (Type-R) 9. Receiver Pipe - Disconnect (With A/
  • Page 32A/C Diagnostic Process When a customer presents an A/C concern, do the following procedure to identify the cause of the problem. 1. Confirm the type of concern. If a customer complains about an A/C performance problem, go to step 2. If a customer complains about an A/C noise problem, do the A/C syst
  • Page 33A/C Line Removal and Installation 1. A/C Line - Remove and Install cardiagn.com
  • Page 34A/C Pressure Sensor Removal and Installation NOTE: Where icon is shown, click for further information. 1 cardiagn.com Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) Replace For some models
  • Page 35cardiagn.com Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) Replace 1. A/C Refrigerant - Recover 2. Front Grille Cover - Remove 3. Front Bumper - Remove 4. A/C Pressure Sensor - Remove 1. Hold the A/C pressure sensor block with a wrench to prevent damaging the discharge hos
  • Page 36A new O-ring should be used at each fitting. Prior to installation, apply a thin coat of the same refrigerant oil used in the A/C compressor. Be sure to use the correct O-ring for refrigerant types to avoid leakage. Charge the system with the specified amount of refrigerant. cardiagn.com
  • Page 37A/C Refrigerant Leak Check Special Tool Required Image Description/Tool Number R-1234yf A/C Recover/Recycle/Recharge Machine ROB421234* cardiagn.com Infrared Refrigerant Leak Detector ROB22791* Dual Mode Refrigerant Gas Leak Detector ROBLD020*
  • Page 38Image Description/Tool Number R-1234yf Leak Detection Kit TRP1234YF* *These tools are available through the Honda Tool and Equipment Program; call 888-424-6857. cardiagn.com Compressed air mixed with the HFO-1234yf (R-1234yf) forms a combustible vapor. The vapor can burn or explode causing serious i
  • Page 395. A/C Refrigerant - Leak Check 1. With the power system off, use a leak detector first to detect the leak source. Follow a continuous path in order to ensure that you will not miss any possible leaks. Test the following areas of the system for leaks: Possible Leak Diagnostic Procedure with the Note
  • Page 40NOTE: Check for leaks in a dark work area, and use the UV light and the special glasses from the leak check kit. Other UV lights may not work well. Small leaks may take up to 1 week of vehicle operation (with normal A/C use) to become visible. Possible Leak Diagnostic Procedure with Infrared Leak De
  • Page 41A/C Refrigerant Leak Check Special Tool Required Image Description/Tool Number R134a A/C Automatic Recover/Recycle/Recharge Machine ROB48920T, commercially available Dual Mode Refrigerant Gas Leak Detector ROBLD020* Infrared Refrigerant Leak Detector ROB22791* cardiagn.com
  • Page 42Image Description/Tool Number OPTIMAX Jr. A/C Leak Detection Kit TRP124893* *These tools are available through the Honda Tool and Equipment Program; call 888-424-6857. cardiagn.com Compressed air mixed with the R-134a forms a combustible vapor. The vapor can burn or explode causing serious injury. N
  • Page 43Fluorescent Dye Usage Tips Use only Tracer-Stick single dose fluorescent dye capsules from Tracerline . Other dyes contain solvents that may contaminate the refrigerant oil, leading to component failure. Adding excessive amounts of dye can damage the A/C compressor. PAG oil is water soluble, so cond
  • Page 44Possible Leak Area Diagnostic Procedure with the Leak Notes Detector Evaporator Check at the evaporator drain hose Check at the passenger's side vent and turn the blower on at low speed A/C lines Wiggle the rubber hoses when Check all fittings, couplings, pressure switches, checking crimped metal en
  • Page 45Possible Leak Area Diagnostic Procedure with Infrared Leak Detector or Fluorescent Dye A/C compressor Check for leaks at all of the A/C compressor joints, the clutch center, the A/C compressor front housing bolts, and the scroll bolts on the back of the A/C compressor If a leak is found, use a perma
  • Page 46A/C Refrigerant Oil Replacement Special Tool Required Image Description/Tool Number R-1234yf POE Oil Injector ROB18470* cardiagn.com *Available through the Honda Tool and Equipment Program; call 888-424-6857. 1. A/C Refrigerant Oil - Replace Recommended POE oil: RL85HM P/N 38899-RLV-A01: 40 m L(1 1/
  • Page 47Parts Oil Amount A/C compressor 77-103 mL (2 3/5-3 1/2 fl oz) 2. A/C Compressor Oil - Adjustment NOTE: Cover the pulley and clutch with plastic bag to prevent from spilling the oil. If no oil was drained from the removed A/C compressor, do not drain more than 50 mL (1 2/3 fl oz) from the new A/C com
  • Page 48*1 cardiagn.com 3. A/C Compressor Oil - Refill 1. Refill the oil from suction port.
  • Page 49A/C Refrigerant Oil Replacement Special Tool Required Image Description/Tool Number Oil Injector Tool Robinair ROB16256, commercially available cardiagn.com 1. A/C Refrigerant Oil - Replace Recommended PAG oil: DENSO ND-OIL 8 P/N 38897-PR7-A01AH: 120 mL (4 fl oz) It is important to have the correct
  • Page 50NOTE: Cover the pulley and clutch with plastic bag to prevent from spilling the oil. If no oil was drained from the removed A/C compressor, do not drain more than 50 mL (1 2/3 fl oz) from the new A/C compressor. cardiagn.com Torque: N·m (kgf·m, lbf·ft) Replace
  • Page 513. A/C Compressor Oil - Refill 1. Refill the oil from suction port. cardiagn.com
  • Page 52A/C Refrigerant Recovery/Evacuation/Charging Special Tool Required Image Description/Tool Number R-1234yf A/C Recover/Recycle/Recharge Machine ROB421234* R-1234yf POE Oil Injector ROB18470* cardiagn.com *These tools are available through the Honda Tool and Equipment Program; call 888-424-6857. Compr
  • Page 53If accidental system discharge occurs, ventilate the work area before resuming service. Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers. Do not allow moisture to contaminate the A/C system oil. Moisture in the oil is difficult to remove, and
  • Page 542. Measure the amount of refrigerant oil removed from the A/C system after the recovery process is completed. Be sure to put the same amount of new refrigerant oil back into the A/C system before charging. 3. A/C System - Evacuate 1. Evacuate the system. The vacuum pump should run for a minimum of 3
  • Page 55A/C Refrigerant Recovery/Evacuation/Charging Special Tool Required Image Description/Tool Number Compact Electronic Vacuum Gauge Robinair ROB14777, commercially available R134a A/C Automatic Recover/Recycle/Recharge Machine cardiagn.com ROB48920T, commercially available PAG Oil Injector Robinair ROB
  • Page 56Compressed air mixed with the R-134a forms a combustible vapor. The vapor can burn or explode causing serious injury. Never use compressed air to pressure test R-134a service equipment or vehicle air conditioning systems. Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose,
  • Page 572. A/C Refrigerant - Recover cardiagn.com 1. Recover the refrigerant from the A/C system. 2. Measure the amount of refrigerant oil removed from the A/C system after the recovery process is completed. Be sure to put the same amount of new refrigerant oil back into the A/C system before charging. 3. A
  • Page 584. A/C Refrigerant - Leak Check 5. A/C Refrigerant - Charge 1. Charge the system with the specified amount of R-134a refrigerant. Do not overcharge the system; the A/C compressor will be damaged. Select the appropriate units of measure for your refrigerant A/C recover/recycle/recharge machine. Refri
  • Page 59A/C Signal Circuit Troubleshooting A/C Signal Circuit Troubleshooting 1. DTC check: cardiagn.com ‐1. Turn the vehicle to the ON mode. ‐2. Check for Pending or Confirmed DTCs with the HDS. DTC Description Confirmed Pending DTC DTC Are any Pending or Confirmed DTCs indicated? YES Go to the indicated D
  • Page 60‐4. Check the parameter(s) below with the HDS. Signal Threshold Current conditions Values Unit Values Unit A/C CLUTCH ON Do the current condition(s) match the threshold? YES Go to step 3. NO Do the A/C system test.■ 3. A/C system check: ‐1. Check the A/C system. Does the A/C system operate? YES The
  • Page 61YES The ACC/A/C MG CLUTCH RLY CL- wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If the symptom/indication goes away and the PCM was substituted, replace the original PCM.■ NO Check for p
  • Page 62A/C Signal Circuit Troubleshooting A/C Signal Circuit Troubleshooting 1. DTC check: cardiagn.com ‐1. Turn the vehicle to the ON mode. ‐2. Check for Pending or Confirmed DTCs with the HDS. DTC Description Confirmed Pending DTC DTC Are any Pending or Confirmed DTCs indicated? YES Go to the indicated D
  • Page 63‐4. Check the parameter(s) below with the HDS. Signal Threshold Current conditions Values Unit Values Unit A/C CLUTCH ON Do the current condition(s) match the threshold? YES Go to step 3. NO Do the A/C system test.■ 3. A/C system check: ‐1. Check the A/C system. Does the A/C system operate? YES The
  • Page 64YES The ACC/ A/C MG CLUTCH RLY CL- wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If the symptom/indication goes away and the PCM was substituted, replace the original PCM.■ NO Check for
  • Page 65A/C Signal Circuit Troubleshooting cardiagn.com A/C Signal Circuit Troubleshooting 1. DTC check: ‐1. Turn the vehicle to the ON mode. ‐2. Check for Pending or Confirmed DTCs with the HDS. DTC Description Confirmed Pending DTC DTC Are any Pending or Confirmed DTCs indicated? YES Go to the indicated D
  • Page 66‐4. Check the parameter(s) below with the HDS. Signal Threshold Current conditions Values Unit Values Unit A/C CLUTCH ON Do the current condition(s) match the threshold? YES Go to step 3. NO Do the A/C system test.■ 3. A/C system check: ‐1. Check the A/C system. Does the A/C system operate? YES The
  • Page 67YES The A/C MG CLUTCH RLY CL- wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If the symptom/indication goes away and the PCM was substituted, replace the original PCM.■ NO Check for poor
  • Page 68A/C System Contamination Inspection NOTE: If the A/C compressor failure is diagnosed, always use this inspection to check the extent of contamination in the A/C system. The parts illustrations are sample. External appearance may vary from model to model. 1. A/C System Contamination - Inspect Remove
  • Page 69Step Part to Remove Inspection Area Metal, Dark Grey or Black Residue Contamination No Contamination Found cardiagn.com Discharge hose Discharge port (A) Go to step 2. No contamination is present from the A/C 1 (A/C compressor side) compressor. Replace only the A/C compressor. Suction hose Suction p
  • Page 70NOTE: The parts illustrations are sample. External appearance may vary from model to model. 1. A/C Components - Replace Repair Procedure A Replace the following parts: A/C compressor (A) Discharge hose (B) cardiagn.com Repair Procedure B Replace the following parts: A/C compressor (A) Discharge hose
  • Page 71Repair Procedure D Replace the following parts: A/C compressor (A) A/C condenser (B) Expansion valve (C) Evaporator core (D) All A/C hoses and lines cardiagn.com
  • Page 72A/C System Inspection NOTE: For A/C system noise, go to the A/C System Noise Check. Check for climate control DTCs using the Self-Diagnostic Function. If there are any DTCs, go to the appropriate troubleshooting. 1. A/C System - Inspect Before troubleshooting any problem with the A/C system, do the
  • Page 73Inspection Area Check for Actions to Take Dust and pollen filter The dust and pollen filter is clogged or Replace the dust and pollen filter. restricted. Blower fan Check that the A/C operates at each Refer to the symptom troubleshooting. position of the fan control icon (except OFF). If the A/C doe
  • Page 74A/C System Noise Check Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat. Be careful when connecting service equipment. Do not breathe refrigerant or vapor. The A/C system noise check will help you determine the source of abnormal A/C system noise. NOTE: If an a
  • Page 75Check for Result Also Check for Foreign material in the blower Foreign material (leaves or Remove it, and recheck for noise. motor and fan twigs, for example) is present. No foreign material (leaves or Remove the blower motor, and check these items twigs, for example) is present. below. Replace the
  • Page 76Check for Result Also Check for If the refrigerant charge is OK, and there are no leaks, troubleshoot the A/C compressor clutch circuit. 5. Listen with a stethoscope for noises coming from the A/C compressor, and check these items: Check for Result Also Check for The noise changes when the A/C compr
  • Page 77A/C System Test Special Tool Required Image Description/Tool Number R-1234yf A/C Recover/Recycle/Recharge Machine ROB421234* Big Digit Hygro-Thermometer PYR445703, commercially cardiagn.com available Throttle Pedal Depressor Tool B240B, commercially available *Available through the Honda Tool and Eq
  • Page 78Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat. Be careful when connecting service equipment. Do not breathe refrigerant or vapor. SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repa
  • Page 79Open the front doors. Apply the parking brake. Shift the vehicle to P, N position/mode, or Neutral. Start the engine. Set the A/C system to the following conditions. - A/C: ON - Temperature control: MAX COOL (Lo) - Mode control: VENT - Recirculation control: RECIRCULATE - Fan control: Max - All vent
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  • Page 81cardiagn.com 8. To complete the high side (discharge) pressure/blower intake temperature chart: Mark the high side (discharge) pressure on the vertical line. Mark the blower intake temperature on the bottom line. Draw a vertical line from the blower intake temperature mark. Draw a horizontal line fr
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  • Page 83cardiagn.com 9. To complete the low side (suction) pressure/blower intake temperature chart: Mark the low side (suction) pressure along the vertical line. Mark the blower intake temperature along the bottom line. Draw a vertical line from the blower intake temperature mark. Draw a horizontal line fr
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  • Page 85cardiagn.com Pressure Test 5. A/C System Pressure - Test Test results Related symptoms Probable cause Driver and passenger's side A/C vent Suction pressure may be low Low refrigerant charge temperatures may vary by approximately 20 Expansion valve not opening sufficiently °F (11 °C) or more Driver's
  • Page 86Test results Related symptoms Probable cause Discharge pressure abnormally High Discharge pressure reduced when A/C Significant refrigerant overcharge condenser cooled with water spray Restricted/weak airflow through A/C Dirty A/C condenser or damaged fins condenser Debris between A/C condenser and
  • Page 87Test results Related symptoms Probable cause Suction pressure High and Discharge Excessive A/C compressor noise A/C compressor internal damage (Check for pressure Low Pressures equalize quickly and noise A/C system debris contamination) after A/C compressor turns off Suction and discharge pressures
  • Page 88A/C System Test Special Tool Required Image Description/Tool Number R134a A/C Automatic Recover/Recycle/Recharge Machine ROB48920T, commercially available Big Digit Hygro-Thermometer PYR445703, commercially cardiagn.com available Throttle Pedal Depressor Tool B240B, commercially available *Available
  • Page 89Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat. Be careful when connecting service equipment. Do not breathe refrigerant or vapor. SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repa
  • Page 90Open the front doors. Apply the parking brake. Shift the vehicle to P, N position/mode, or Neutral. Start the engine. Set the A/C system to the following conditions. - A/C: ON - Temperature control: MAX COOL (Lo) - Mode control: VENT - Recirculation control: RECIRCULATE - Fan control: Max - All vent
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  • Page 92cardiagn.com 8. To complete the high side (discharge) pressure/blower intake temperature chart: Mark the high side (discharge) pressure on the vertical line. Mark the blower intake temperature on the bottom line. Draw a vertical line from the blower intake temperature mark. Draw a horizontal line fr
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  • Page 94cardiagn.com 9. To complete the low side (suction) pressure/blower intake temperature chart: Mark the low side (suction) pressure along the vertical line. Mark the blower intake temperature along the bottom line. Draw a vertical line from the blower intake temperature mark. Draw a horizontal line fr
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  • Page 96cardiagn.com Pressure Test 5. A/C System Pressure - Test Test results Related symptoms Probable cause Driver and passenger's side A/C vent Suction pressure may be low Low refrigerant charge temperatures may vary by approximately 20 Expansion valve not opening sufficiently °F (11 °C) or more Driver's
  • Page 97Test results Related symptoms Probable cause Discharge pressure abnormally High Discharge pressure reduced when A/C Significant refrigerant overcharge condenser cooled with water spray Restricted/weak airflow through A/C Dirty A/C condenser or damaged fins condenser Debris between A/C condenser and
  • Page 98Test results Related symptoms Probable cause Suction pressure High and Discharge Excessive A/C compressor noise A/C compressor internal damage (Check for pressure Low Pressures equalize quickly and noise A/C system debris contamination) after A/C compressor turns off Suction and discharge pressures
  • Page 99A/C System Test Special Tool Required Image Description/Tool Number R134a A/C Automatic Recover/Recycle/Recharge Machine ROB48920T, commercially available Big Digit Hygro-Thermometer PYR445703, commercially cardiagn.com available Throttle Pedal Depressor Tool B240B, commercially available
  • Page 100Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat. Be careful when connecting service equipment. Do not breathe refrigerant or vapor. SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repa
  • Page 101Open the front doors. Apply the parking brake. Shift the vehicle to Neutral. Start the engine. Set the A/C system to the following conditions. - A/C: ON - Temperature control: MAX COOL (Lo) - Mode control: VENT - Recirculation control: RECIRCULATE - Fan control: Max - All vents: Open Use the throttl
  • Page 102cardiagn.com 8. To complete the high side (discharge) pressure/blower intake temperature chart: Mark the high side (discharge) pressure on the vertical line. Mark the blower intake temperature on the bottom line. Draw a vertical line from the blower intake temperature mark. Draw a horizontal line fr
  • Page 103cardiagn.com 9. To complete the low side (suction) pressure/blower intake temperature chart: Mark the low side (suction) pressure along the vertical line. Mark the blower intake temperature along the bottom line. Draw a vertical line from the blower intake temperature mark. Draw a horizontal line fr
  • Page 104cardiagn.com Pressure Test 5. A/C System Pressure - Test Test results Related symptoms Probable cause Driver and passenger's side A/C vent Suction pressure may be low Low refrigerant charge temperatures may vary by approximately 20 Expansion valve not opening sufficiently °F (11 °C) or more Driver's
  • Page 105Test results Related symptoms Probable cause Discharge pressure abnormally High Discharge pressure reduced when A/C Significant refrigerant overcharge condenser cooled with water spray Restricted/weak airflow through A/C Dirty A/C condenser or damaged fins condenser Debris between A/C condenser and
  • Page 106Test results Related symptoms Probable cause Suction pressure High and Discharge Excessive A/C compressor noise A/C compressor internal damage (Check for pressure Low Pressures equalize quickly and noise A/C system debris contamination) after A/C compressor turns off Suction and Discharge pressures
  • Page 107A/C System Test Special Tool Required Image Description/Tool Number R-1234yf A/C Recover/Recycle/Recharge Machine ROB421234* Big Digit Hygro-Thermometer PYR445703, commercially cardiagn.com available Throttle Pedal Depressor Tool B240B, commercially available *Available through the Honda Tool and Eq
  • Page 108Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat. Be careful when connecting service equipment. Do not breathe refrigerant or vapor. SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repa
  • Page 109Open the front doors. Apply the parking brake. Shift the vehicle to Neutral. Start the engine. Set the A/C system to the following conditions. - A/C: ON - Temperature control: MAX COOL (Lo) - Mode control: VENT - Recirculation control: RECIRCULATE - Fan control: Max - All vents: Open Use the throttl
  • Page 110cardiagn.com 8. To complete the high side (discharge) pressure/blower intake temperature chart: Mark the high side (discharge) pressure on the vertical line. Mark the blower intake temperature on the bottom line. Draw a vertical line from the blower intake temperature mark. Draw a horizontal line fr
  • Page 111cardiagn.com 9. To complete the low side (suction) pressure/blower intake temperature chart: Mark the low side (suction) pressure along the vertical line. Mark the blower intake temperature along the bottom line. Draw a vertical line from the blower intake temperature mark. Draw a horizontal line fr
  • Page 112cardiagn.com Pressure Test 5. A/C System Pressure - Test Test results Related symptoms Probable cause Driver and passenger's side A/C vent Suction pressure may be low Low refrigerant charge temperatures may vary by approximately 20 Expansion valve not opening sufficiently °F (11 °C) or more Driver's
  • Page 113Test results Related symptoms Probable cause Discharge pressure abnormally High Discharge pressure reduced when A/C Significant refrigerant overcharge condenser cooled with water spray Restricted/weak airflow through A/C Dirty A/C condenser or damaged fins condenser Debris between A/C condenser and
  • Page 114Test results Related symptoms Probable cause Suction pressure High and Discharge Excessive A/C compressor noise A/C compressor internal damage (Check for pressure Low Pressures equalize quickly and noise A/C system debris contamination) after A/C compressor turns off Suction and Discharge pressures
  • Page 115Blower Motor Removal and Installation SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repairs or service. 1 cardiagn.com 1. Glove Box Back Cover - Remove 2. Blower Motor - Remove 3. All Removed Parts - Install 1. Install the
  • Page 116Blower Power Transistor Removal and Installation SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repairs or service. 1 cardiagn.com
  • Page 1171. Glove Box Back Cover - Remove 2. Passenger's Heater Duct - Remove 3. Blower Power Transistor - Remove 4. All Removed Parts - Install 1. Install the parts in the reverse order of removal. cardiagn.com
  • Page 118Blower Power Transistor Test NOTE: Before testing the power transistor, check for climate control DTCs. 1. Glove Box - Remove 2. Blower Power Transistor - Test 1. Disconnect the blower power transistor connector. 2. Measure the resistance between terminals No. 2 and No. 4 of the blower power transis
  • Page 1193. All Removed Parts - Install 1. Install the parts in the reverse order of removal. cardiagn.com
  • Page 120Blower Unit Removal and Installation SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repairs or service. 1 cardiagn.com
  • Page 121Torque: N·m (kgf·m, lbf·ft) 1. Glove Box Back Cover - Remove 2. Passenger's Heater Duct - Remove 3. Blower Unit - Remove 4. Climate Control Unit - Remove 5. All Removed Parts - Install 1. Install the parts in the reverse order of removal. cardiagn.com
  • Page 122Heater Unit/Core Removal and Installation NOTE: Be careful not to damage the heater core. 1 cardiagn.com 1. HVAC Unit - Remove 2. Driver's Heater Duct - Remove 3. Aspirator and Aspirator Hose - Remove 4. Heater Pipe Cover - Remove 5. Heater Pipe Bracket - Remove 6. Grommet - Remove
  • Page 1237. Heater Core - Remove 8. All Removed Parts - Install 1. Install the parts in the reverse order of removal. NOTE: Make sure that there is no air leakage. cardiagn.com
  • Page 124Dust and Pollen Filter Removal and Installation 1 cardiagn.com 1. Dust and Pollen Filter - Remove 2. All Removed Parts - Install 1. Install the parts in the reverse order of removal. NOTE: Make sure that there is no air leaking out of the blower unit. 3. Maintenance Minder - Reset (With Maintenance
  • Page 125Evaporator Core Removal and Installation Vehicles equipped with R-744 or R-1234yf refrigerant system evaporator(s) shall include in their service manual that only new and SAE J2842 certified evaporator(s) shall be used as replacement parts. NOTE: Be careful not to damage the evaporator core. 1 cardi
  • Page 1262. Blower Unit - Remove 3. Upper Heater Unit Case - Remove 4. Evaporator Core - Remove 5. Evaporator Temperature Sensor - Remove 6. All Removed Parts - Install 1. Install the parts in the reverse order of removal, and note these items: cardiagn.com Replace the seal washer with new ones at each fitti
  • Page 127Evaporator Core Removal and Installation NOTE: Be careful not to damage the evaporator core. 1 cardiagn.com Replace 1. HVAC Unit - Remove 2. Blower Unit - Remove
  • Page 1283. Upper Heater Unit Case - Remove 4. Evaporator Core - Remove 5. Evaporator Temperature Sensor - Remove 6. All Removed Parts - Install 1. Install the parts in the reverse order of removal, and note these items: Replace the seal washer with new ones at each fitting, and apply a thin coat of refriger
  • Page 129Evaporator Expansion Valve Removal and Installation 1 cardiagn.com Torque: N·m (kgf·m, lbf·ft) Replace 1. A/C Refrigerant - Recover 2. A/C Lines - Remove 3. Expansion Valve - Remove
  • Page 1304. All Removed Parts - Install 1. Install the parts in the reverse order of removal, and note these items: Replace the seal washer with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the correct seal washer to avoid leakage. Charge the syste
  • Page 131Evaporator Temperature Sensor Removal, Installation, and Test 1 cardiagn.com 1. HVAC Unit - Remove 2. Evaporator Core - Remove 3. Evaporator Temperature Sensor - Remove 4. All Removed Parts - Install
  • Page 1321. Install the evaporator temperature sensor (A) in the evaporator core. Refer to the following position list. B C* Row mm (in) Factory-Preset Position 3rd 128 (5.04) *: Measure from end of aluminum evaporator tank. B C* Row mm (in) New Position 2nd 128 (5.04) *: Measure from end of aluminum evapora
  • Page 133Front Seat Heater Control Unit Connector for Inputs and Outputs Terminal Terminal name Description Signal number With front seat heater operation: about battery voltage 1 +B HEATER(DR) Outputs +B HEATER(DR) signal If none of above conditions are met: less than 0.2 V Power source for front seat heate
  • Page 134Front Seat Heater Control Unit Input Test NOTE: Before testing, make sure the No. B5 (10 A), No. B9 (10 A), and No. B32 (20 A) fuses in the under-dash fuse/relay box are OK. 1. Disconnect the front seat heater control unit 14P connector. 2. Inspect the connector and socket terminals to be sure they
  • Page 135Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 4 BLK In all power modes Measure the voltage to ground: Poor ground (G602) There should be less than 0.2 V. An open or high resistance in the ground wire 1 GRN Vehicle ON mode, Measure the voltage to gro
  • Page 136Front Seat Heater Control Unit Removal and Installation 1. Front Passenger's Seat - Remove NOTE: If removing the front passenger's seat, you do not need to remove outside of vehicle the front passenger's seat. 2. Front Seat Heater Control Unit - Remove 1. Disconnect the connector (A). 2. Remove the
  • Page 137HVAC DTC Troubleshooting: A-A4, CD cardiagn.com DTC screen A-A4 or DTC indicator Cd: Unknown Sunlight Sensor Type 1. DTC check: ‐1. Clear the DTC with the HDS. ‐2. Turn the vehicle to the OFF (LOCK) mode then the ON mode. ‐3. Do the Self-Diagnostic Function with the HDS or the climate control unit.
  • Page 138control panel with display) indicated? YES Go to step 3. NO Intermittent failure, the system is OK at this time.■ 3. Connector check: ‐1. Turn the vehicle to the OFF (LOCK) mode. ‐2. Check connection of the following connectors. Sunlight sensor 2P connector (with automatic wiper or without automatic
  • Page 139HVAC DTC Troubleshooting: D-A4 cardiagn.com DTC screen D-A4: Climate Control Unit Lost Communication with Center Display Unit NOTE: The DTC may be stored due to the grounding failure or the power source failure at the center display (the grounding inspection and the power source inspection on each c
  • Page 140With navigation Test condition Vehicle OFF (LOCK) mode Audio-navigation unit connector A (24P): disconnected Climate control unit connector A (32P): disconnected Test point 1 Audio-navigation unit connector A (24P) No. 14 Test point 2 Climate control unit connector A (32P) No. 25 Is there continuity
  • Page 141HVAC DTC Troubleshooting: D-B8, C0 DTC screen D-B8 or DTC indicator C0: Climate Control Unit Internal Error 1. Problem verification: ‐1. Turn the vehicle to the OFF (LOCK) mode and then the ON mode. ‐2. Do the Self-Diagnostic Function with the climate control unit. ‐3. Check for DTCs. Is Error on th
  • Page 142HVAC Unit Disassembly and Reassembly NOTE: If the packings and seals are damaged or torn, replace it with a new one. 1. HVAC Unit - Exploded View Exploded View cardiagn.com
  • Page 143cardiagn.co
  • Page 144HVAC Unit Removal and Installation SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repairs or service. NOTE: Where icon is shown, click for further information. 1 cardiagn.com
  • Page 145Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) Replace 2 cardiagn.com Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) 3
  • Page 146*1 Torque: N·m (kgf·m, lbf·ft) For some models cardiagn.com 1. 12 Volt Battery Terminal - Disconnect 2. A/C Refrigerant - Recover (With A/C) 3. Engine Coolant - Drain 4. A/C Lines - Remove (With A/C) NOTE: Take care not to damage or bend the fuel lines or the brake lines.
  • Page 1475. Heater Hoses - Remove NOTE: Engine coolant will run out when the hoses are disconnected; drain it into a clean drip pan. Be sure not to let coolant spill on the electrical parts or the painted surfaces. If any coolant spills, rinse it off immediately. Note the layout of the hoses. 6. Heater Unit
  • Page 148Radiator and A/C Condenser Fan Motor Test 1. Fan Motor - Test 1. Disconnect the connectors from the radiator fan motor (A) and the A/C condenser fan motor (B). 2. Test each motor by connecting 12 volt battery power to fan motor 2P connector (male terminals) terminal No. 1 and ground to fan motor 2P
  • Page 149Radiator and A/C Condenser Fan, Motor, and Shroud Removal and Installation 1 cardiagn.com Torque: N·m (kgf·m, lbf·ft) 2
  • Page 150cardiagn.com Torque: N·m (kgf·m, lbf·ft) 3
  • Page 151cardiagn.com Torque: N·m (kgf·m, lbf·ft) 1. Air Cleaner - Remove 2. Front Grille Cover - Remove 3. Front Bumper - Remove 4. Front Bumper Upper Beam - Remove
  • Page 1525. Connector (A/C Pressure Sensor) - Disconnect cardiagn.com
  • Page 1536. Bulkhead - Move 7. A/C Condenser Fan Shroud Assembly - Remove 8. Radiator Fan Shroud Assembly - Remove 9. A/C Condenser Fan - Remove 10.Fan Motor Protector - Remove cardiagn.com 11. A/C Condenser Fan Motor - Remove 12.Radiator Fan - Remove 13.Radiator Fan Motor - Remove 14.All Removed Parts - Ins
  • Page 154Radiator and A/C Condenser Fan, RFC Unit, and Shroud Removal and Installation 1. Air Cleaner - Remove 2. Front Grille Cover - Remove 3. Front Bumper - Remove 4. Front Bumper Upper Beam - Remove 5. Bulkhead - Move cardiagn.com 1. Disconnect the water bypass hose (A). 2. Remove the receiver line (B),
  • Page 155cardiagn.com 2. Remove the harness clamps (C). 3. Remove the expansion tank outlet pipe (D).
  • Page 1564. Remove the fan shroud assembly. cardiagn.com 7. Fan Shroud Assembly - Disassemble 8. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
  • Page 157Radiator and A/C Condenser Fan, RFC Unit, and Shroud Removal and Installation 1. Air Cleaner - Remove 2. Front Grille Cover - Remove 3. Front Bumper - Remove 4. Front Bumper Upper Beam - Remove cardiagn.com 5. Bulkhead - Move 1. Remove the water hoses (A) and the receiver line (B) from the clamps. 2
  • Page 158cardiagn.com 2. Remove the harness clamps (C) and the expansion tank outlet pipe (D). 7. Fan Shroud Assembly - Remove
  • Page 159cardiagn.com 8. Fan Shroud - Disassemble 9. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
  • Page 160Side Defogger Vent Trim Removal and Installation 1. Side Defogger Vent Trim - Remove Driver's side cardiagn.com Passenger's side 2. All Removed Parts - Install 1. Install the parts in the reverse order of removal.