IR CONDITIONER SECTION MTC MNUL IR CONDITIONER C D CONTENTS E SERVICE INFORMTION... 3 PRECUTIONS... 3 Precaution for Supplemental Restraint System (SRS) "IR G" and "SET ELT PRE-TEN- SIONER"...3 Precaution Necessary for Steering Wheel Rotation fter attery Disconnect...3 Precaution for Procedure without Cowl Top Cover...4 Precaution for Working with HFC-134a (R-134a)...4 General Refrigerant Precaution...4 Oil Precaution...5 Precaution for Refrigerant Connection...5 Precaution for Service of Compressor...7 Precaution for Service Equipment...8 Precaution for Leak Detection Dye...9 PREPRTION...11 HFC-134a (R-134a) Service Tool and Equipment...11 Commercial Service Tool...13 REFRIGERTION SYSTEM...15 Refrigerant Cycle...15 Refrigerant System Protection...15 Component Part Location...16 OIL...17 Maintenance of Oil Quantity in Compressor...17 IR CONDITIONER CONTROL...19 Control Operation...19 Discharge ir Flow...20 System Description...20 TROULE DIGNOSIS...22 CONSULT-II Function (CM)...22 How to Perform Trouble Diagnosis for Quick and ccurate Repair...22 Component Parts and Harness Connector Location...23 Schematic...25 Wiring Diagram - Heater -...26 Wiring Diagram - /C,M -...27 Operational Check...30 Mode Door...31 ir Mix Door...32 Intake Door...33 Front lower Motor Circuit...33 Magnet Clutch Circuit (If Equipped)...37 Insufficient Cooling...45 Insufficient Heating...52 Noise...53 CONTROLLER...55 Removal and Installation...55 Disassembly and ssembly...56 THERMO CONTROL MPLIFIER...57 Removal and Installation...57 /C UNIT SSEMLY...58 Removal and Installation...58 Disassembly and ssembly...60 LOWER MOTOR...62 Removal and Installation...62 INTKE DOOR...63 Intake Door Cable djustment...63 IR MIX DOOR...64 ir Mix Door Cable djustment...64 MODE DOOR...65 Mode Door Cable djustment...65 LOWER FN RESISTOR...66 Removal and Installation...66 HETER CORE...67 Removal and Installation...67 IR CONDITIONER FILTER...68 Removal and Installation...68 F G H I MTC K L M N O P MTC-1
DUCTS ND GRILLES... 69 Removal and Installation... 69 REFRIGERNT LINES... 74 HFC-134a (R-134a) Service Procedure... 74 Component... 76 Removal and Installation of Compressor - HR16DE... 78 Removal and Installation of Compressor - MR18DE... 80 Removal and Installation of Low-Pressure Flexible Hose... 81 Removal and Installation of High-Pressure Flexible Hose... 82 Removal and Installation of High-Pressure Pipe... 83 Removal and Installation of Refrigerant Pressure Sensor... 83 Removal and Installation of Condenser... 84 Removal and Installation of Liquid Tank... 84 Removal and Installation of Evaporator... 85 Removal and Installation of Expansion Valve... 86 Checking of Refrigerant Leaks... 86 Checking System for Leaks Using the Fluorescent Leak Detector... 87 Dye Injection... 87 Electronic Refrigerant Leak Detector... 87 SERVICE DT ND SPECIFICTIONS (SDS)... 90 Compressor... 90 Oil... 90 Refrigerant... 90 MTC-2
SERVICE INFORMTION PRECUTIONS PRECUTIONS Precaution for Supplemental Restraint System (SRS) "IR G" and "SET ELT PRE-TENSIONER" INFOID:0000000004784399 The Supplemental Restraint System such as IR G and SET ELT PRE-TENSIONER, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the SRS and S section of this Service Manual. WRNING: To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSN/INFINITI dealer. Improper maintenance, including incorrect removal and installation of the SRS can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and ir ag Module, see the SRS section. Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. PRECUTIONS WHEN USING POWER TOOLS (IR OR ELECTRIC) ND HMMERS WRNING: When working near the irbag Diagnosis Sensor Unit or other irbag System sensors with the Ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury. When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service. Precaution Necessary for Steering Wheel Rotation fter attery Disconnect INFOID:0000000004687764 NOTE: This Procedure is applied only to models with Intelligent Key system and NTS (NISSN NTI-THEFT SYS- TEM). Remove and install all control units after disconnecting both battery cables with the ignition knob in the LOCK position. lways use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results. For models equipped with the Intelligent Key system and NTS, an electrically controlled steering lock mechanism is adopted on the key cylinder. For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and steering wheel rotation will become impossible. If steering wheel rotation is required when battery power is interrupted, follow the procedure below before starting the repair operation. OPERTION PROCEDURE 1. Connect both battery cables. NOTE: Supply power using jumper cables if battery is discharged. 2. Use the Intelligent Key or mechanical key to turn the ignition switch to the CC position. t this time, the steering lock will be released. 3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated. 4. Perform the necessary repair operation. C D E F G H I MTC K L M N O P MTC-3
PRECUTIONS 5. When the repair work is completed, return the ignition switch to the LOCK position before connecting the battery cables. (t this time, the steering lock mechanism will engage.) 6. Perform a self-diagnosis check of all control units using CONSULT-III. Precaution for Procedure without Cowl Top Cover When performing the procedure after removing cowl top cover, cover the lower end of windshield with urethane, etc. INFOID:0000000004307042 Precaution for Working with HFC-134a (R-134a) PII3706J INFOID:0000000004307043 WRNING: CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. These refrigerants must never be mixed, even in the smallest amounts. If the refrigerants are mixed a compressor malfunction is likely to occur. Use only specified oil for the HFC-134a (R-134a) /C system and HFC-134a (R-134a) components. If oil other than that specified is used, compressor malfunction is likely to occur. The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following handling precautions must be observed: - When removing refrigerant components from a vehicle, immediately cap (seal) the component to minimize the entry of moisture from the atmosphere. - When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just before connecting the components. Connect all refrigerant loop components as quickly as possible to minimize the entry of moisture into system. - Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without proper sealing, oil will become moisture saturated and should not be used. - void breathing /C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat. Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a) refrigerant. If accidental system discharge occurs, ventilate work area before resuming service. dditional health and safety information may be obtained from refrigerant and oil manufacturers. - Do not allow /C oil to come in contact with styrofoam parts. Damage may result. General Refrigerant Precaution MTC-4 INFOID:0000000004307044 WRNING: void breathing /C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat. Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a) refrigerant. If accidental system discharge occurs, ventilate work area before resuming service. dditional health and safety information may be obtained from refrigerant and oil manufacturers. Do not release refrigerant into the air. Use approved recovery/recycling equipment to capture the refrigerant every time an air conditioning system is discharged. lways wear eye and hand protection (goggles and gloves) when working with any refrigerant or air conditioning system. Do not store or heat refrigerant containers above 52 C (126 F). Do not heat a refrigerant container with an open flame; if container warming is required, place the bottom of the container in a warm pail of water. Do not intentionally drop, puncture, or incinerate refrigerant containers. Keep refrigerant away from open flames: poisonous gas will be produced if refrigerant burns. Refrigerant will displace oxygen, therefore be certain to work in well ventilated areas to prevent suffocation. Do not pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air conditioning systems with compressed air during repair. Some mixtures of air and HFC-134a (R-134a) have
PRECUTIONS been shown to be combustible at elevated pressures. These mixtures, if ignited, may cause injury or property damage. dditional health and safety information may be obtained from refrigerant manufacturers. Oil Precaution INFOID:0000000004307045 Use only specified oil for the HFC-134a (R-134a) /C system and HFC-134a (R-134a) components. If oil other than that specified is used, compressor malfunction is likely to occur. The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following handling precautions must be observed: - When removing refrigerant components from a vehicle, immediately cap (seal) the component to minimize the entry of moisture from the atmosphere. - When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just before connecting the components. Connect all refrigerant loop components as quickly as possible to minimize the entry of moisture into system. - Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without proper sealing, oil will become moisture saturated and should not be used. void breathing /C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat. Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a) refrigerant. If accidental system discharge occurs, ventilate work area before resuming service. dditional health and safety information may be obtained from refrigerant and oil manufacturers. Do not allow /C oil to come in contact with styrofoam parts. Damage may result. Precaution for Refrigerant Connection INFOID:0000000004307046 new type refrigerant connection has been introduced to all refrigerant lines except the following location. Expansion valve to evaporator Refrigerant pressure sensor to condenser FETURES OF NEW TYPE REFRIGERNT CONNECTION C D E F G H I MTC K L M SH815E The O-ring has been relocated. It has also been provided with a groove for proper installation. This eliminates the chance of the O-ring being caught in, or damaged by, the mating part. The sealing direction of the O-ring is now set vertically in relation to the contacting surface of the mating part to improve sealing characteristics. The reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby facilitating piping connections. O-RING ND REFRIGERNT CONNECTION N O P MTC-5
PRECUTIONS MR18DE - TYPE 1 and HR16DE SJI0697E MR18DE - TYPE 2 WRNING: Make sure all refrigerant is discharged into the recycling equipment and the pressure in the system is less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove it. CUTION: The new and former refrigerant connections use different O-ring configurations. Do not confuse O- rings since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at, or around, the connection. MTC-6 SJI1327E
O-Ring Part Numbers and Specifications PRECUTIONS Connection type Piping connection point Part number QTY O-ring size New Former Condenser to high-pressure flexible hose 92472 N8210 1 12 Condenser to high-pressure pipe 92471 N8210 1 8 Low-pressure flexible hose to expansion valve 92473 N8210 1 16 High-pressure pipe to expansion valve 92471 N8210 1 8 Compressor to low-pressure flexible hose 92474 N8210 1 19 Compressor to high-pressure flexible hose 92472 N8210 1 12 Liquid tank to condenser pipe Inlet 1 92471 N8210 Outlet 1 Refrigerant pressure sensor to condenser J2476 89956 1 10 Expansion valve to evaporator Inlet 92471 N8200 2 12 Outlet 92473 N8200 2 16 CUTION: When replacing or cleaning refrigerant cycle components, observe the following. When the compressor is removed, store it in the same position as it is when installed on the vehicle. Doing so will cause oil to enter the low-pressure chamber. When connecting tubes, always use a torque wrench and a back-up wrench. fter disconnecting tubes, immediately plug all openings to prevent entry of dirt and moisture. When installing an air conditioner in the vehicle, connect the pipes as the final stage of the operation. Do not remove the seal caps of pipes and other components until just before required for connection. llow components stored in cool areas to warm to working area temperature before removing seal caps. This prevents condensation from forming inside /C components. Thoroughly remove moisture from the refrigeration system before charging the refrigerant. lways replace used O-rings. When connecting tube, apply the specified /C oil to circle of the O-rings. e careful not to apply oil to threaded portion. Refer to MTC-90, "Oil". O-ring must be closely attached to dented portion of tube. When replacing the O-ring, be careful not to damage O-ring and tube. Connect tube until you hear it click, then tighten the nut or bolt by hand until snug. Make sure that the O-ring is installed to tube correctly. fter connecting line, perform leak test and make sure that there is no leakage from connections. When the refrigerant leaking point is found, disconnect that line and replace the O-ring. Then tighten connections of seal seat to the specified torque. 8 C D E F G H I MTC K L M N O P Precaution for Service of Compressor RH861F INFOID:0000000004307047 Plug all openings to prevent moisture and foreign matter from entering. MTC-7
PRECUTIONS When the compressor is removed, store it in the same position as it is when mounted on the car. When replacing or repairing compressor, follow Maintenance of Oil Quantity in Compressor exactly. Refer to MTC-17, "Maintenance of Oil Quantity in Compressor". Keep friction surfaces between clutch and pulley clean. If the surface is contaminated, with oil, wipe it off by using a clean waste cloth moistened with thinner. fter compressor service operation, turn the compressor shaft by hand more than five turns in both directions. This will equally distribute oil inside the compressor. fter the compressor is installed, let the engine idle and operate the compressor for one hour. fter replacing the compressor magnet clutch, apply voltage to the new one and check for usual operation. Precaution for Service Equipment INFOID:0000000004307048 RECOVERY/RECYCLING EQUIPMENT e certain to follow the manufacturer s instructions for machine operation and machine maintenance. Never introduce any refrigerant other than that specified into the machine. ELECTRONIC LEK DETECTOR e certain to follow the manufacturer s instructions for tester operation and tester maintenance. VCUUM PUMP The oil contained inside the vacuum pump is not compatible with the specified oil for HFC-134a (R-134a) /C systems. The vent side of the vacuum pump is exposed to atmospheric pressure. So the vacuum pump oil may migrate out of the pump into the service hose. This is possible when the pump is switched off after evacuation (vacuuming) and hose is connected to it. To prevent this migration, use a manual valve placed near the hoseto-pump connection, as follows. Usually vacuum pumps have a manual isolator valve as part of the pump. Close this valve to isolate the service hose from the pump. For pumps without an isolator, use a hose equipped with a manual shut-off valve near the pump end. Close the valve to isolate the hose from the pump. If the hose has an automatic shut-off valve, disconnect the hose from the pump. s long as the hose is connected, the valve is open and lubricating oil may migrate. Some one-way valves open when vacuum is applied and close under a no vacuum condition. Such valves may restrict the pump s ability to pull a deep vacuum and are not recommended. MNIFOLD GUGE SET e certain that the gauge face indicates HFC-134a or R-134a. e sure the gauge set has 1/2-16 CME threaded connections for service hoses. Confirm the set has been used only with refrigerant HFC-134a (R-134a) and specified oils. RH270D SERVICE HOSES SH533D MTC-8
PRECUTIONS e certain that the service hoses display the markings described (colored hose with black stripe). ll hoses must include positive shutoff devices (either manual or automatic) near the end of the hoses opposite the manifold gauge. C SERVICE COUPLERS Never attempt to connect HFC-134a (R-134a) service couplers to a CFC-12 (R-12) /C system. The HFC-134a (R-134a) couplers will not properly connect to the CFC-12 (R-12) system. However, if an improper connection is attempted, discharging and contamination may occur. Shut-off valve rotation /C service valve RH272D D E F Clockwise Counterclockwise Open Close G RH273D REFRIGERNT WEIGHT SCLE Verify that no refrigerant other than HFC-134a (R-134a) and specified oils have been used with the scale. If the scale controls refrigerant flow electronically, the hose fitting must be 1/2-16 CME. H I MTC K RH274D CHRGING CYLINDER Using a charging cylinder is not recommended. Refrigerant may be vented into air from cylinder s top valve when filling the cylinder with refrigerant. lso, the accuracy of the cylinder is generally less than that of an electronic scale or of quality recycle/recharge equipment. Precaution for Leak Detection Dye INFOID:0000000004307049 The /C system contains a fluorescent leak detection dye used for locating refrigerant leaks. n ultraviolet (UV) lamp is required to illuminate the dye when inspecting for leaks. lways wear fluorescence enhancing UV safety goggles to protect your eyes and enhance the visibility of the fluorescent dye. The fluorescent dye leak detector is not a replacement for an electronic refrigerant leak detector. The fluorescent dye leak detector should be used in conjunction with an electronic refrigerant leak detector to pinpoint refrigerant leaks. For your safety and your customer s satisfaction, read and follow all manufacture s operating instructions and precautions prior to performing the work. compressor shaft seal should not be repaired because of dye seepage. The compressor shaft seal should only be repaired after confirming the leak with an electronic refrigerant leak detector. lways remove any remaining dye from the leak area after repairs are complete to avoid a misdiagnosis during a future service. Do not allow dye to come into contact with painted body panels or interior components. If dye is spilled, clean immediately with the approved dye cleaner. Fluorescent dye left on a surface for an extended period of time cannot be removed. L M N O P MTC-9
PRECUTIONS Do not spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.). Do not use more than one refrigerant dye bottle (1/4 ounce /7.4 cc) per /C system. Leak detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) /C systems are different. Do not use HFC- 134a (R-134a) leak detection dye in CFC-12 (R-12) /C system or CFC-12 (R-12) leak detector dye in HFC- 134a (R-134a) /C system or /C system damage may result. The fluorescent properties of the dye will remain for over three (3) years unless a compressor malfunction occurs. IDENTIFICTION LEL FOR VEHICLE Vehicles with factory installed fluorescent dye have an identification label on the front underside of the hood. NOTE: Vehicles with factory installed fluorescent dye have a green label. Vehicles without factory installed fluorescent dye have a blue label. MTC-10
PREPRTION PREPRTION HFC-134a (R-134a) Service Tool and Equipment INFOID:0000000004307051 Never mix HFC-134a refrigerant and/or its specified oil with CFC-12 (R-12) refrigerant and/or its oil. Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/oil. Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles refrigerant and/or oil) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid mixed use of the refrigerants/oil. dapters that convert one size fitting to another must never be used refrigerant/oil contamination will occur and compressor failure will result. Tool number (Kent-Moore No.) Tool name HFC-134a (R-134a) ( ) Refrigerant Description Container color: Light blue Container marking: HFC-134a (R- 134a) Fitting size: Thread size large container 1/2-16 CME C D E F S-NT196 G ( ) NISSN /C System Oil Type S Type: Poly lkylene glycol oil (PG), type S pplication: HFC-134a (R-134a) variable displacement swash plate compressors (NISSN only) H I S-NT197 ( ) NISSN /C System Oil Type R Type: Poly lkylene glycol oil (PG), type R pplication: HFC-134a (R-134a) vane rotary compressors (NISSN only) MTC K KV991J0130 (CR2005-NI) CR5 /C Service Center S-NT197 Refrigerant recovery, recycling and recharging L M (J-41995) Electronic refrigerant leak detector WJI0293E Checking for refrigerant leaks Power supply: DC 12V (battery terminal) N O P H281 MTC-11
PREPRTION Tool number (Kent-Moore No.) Tool name (J-43926) Refrigerant dye leak detection kit Kit includes: (J-42220) UV lamp and UV safety goggles (J-41459) Refrigerant dye injector (J-41447) Quantity 24, 1/4 ounce bottles of HFC-134a (R-134a) fluorescent leak detection dye (J-43872) Refrigerant dye cleaner (J-42220) Fluorescent dye leak detector ZH200H Description Leak detection dye Power supply: DC 12V (battery terminal) Checking for refrigerant leaks when fluorescent dye is installed in /C system. Includes: UV lamp and UV safety goggles Power supply: DC 12V (battery terminal) SH438F (J-41447) HFC-134a (R-134a) fluorescent leak detection dye (ox of 24, 1/4 ounce bottles) pplication: For HFC-134a (R-134a) PG oil Container: 1/4 ounce (7.4cc) bottle (Includes self-adhesive dye identification labels for affixing to vehicle after charging system with dye.) SH439F (J-41459) HFC-134a (R-134a) Dye injector Use with (J-41447) 1/4 ounce bottles For injecting 1/4 ounce of fluorescent leak detection dye into /C system. SH440F (J-43872) Refrigerant dye cleaner For cleaning dye spills. SH441F (J-39183-C) Manifold gauge set (with hoses and couplers) Identification: The gauge face indicates R-134a. Fitting size: Thread size 1/2-16 CME RJI0196E MTC-12
PREPRTION Tool number (Kent-Moore No.) Tool name Description Service hoses: (J-39500-72) High side hose (J-39500-72R) Low side hose (J-39500-72Y) Utility hose Hose colors: Low side hose: lue with black stripe High side hose: Red with black stripe Utility hose: Yellow with black stripe or green with black stripe Hose fitting to gauge: 1/2-16 CME C Service couplers: (J-39500-20) High side coupler (J-39500-24) Low side coupler S-NT201 Hose fitting to service hose: M14 x 1.5 fitting is optional or permanently attached. D E S-NT202 F (J-39699) Refrigerant weight scale For measuring of refrigerant Fitting size - thread size: 1/2-16 CME G H S-NT200 (J-39649) Vacuum pump (Including the isolator valve) Capacity: ir displacement: 4 CFM Micron rating: 20 microns Oil capacity: 482 g (17 oz) Fitting size: Thread size 1/2-16 CME I MTC Commercial Service Tool S-NT203 INFOID:0000000004307052 K L M N O P MTC-13
PREPRTION (Kent-Moore No.) Tool name (J-41810-NI) Refrigerant identifier equipment (R- 134a) Description For checking refrigerant purity and system contamination RJI0197E Power tool Loosening bolts and nuts PII1407E MTC-14
REFRIGERTION SYSTEM Refrigerant Cycle REFRIGERTION SYSTEM INFOID:0000000004307053 REFRIGERNT FLOW The refrigerant flows in the standard pattern, that is, through the compressor, the condenser with liquid tank, through the evaporator, and back to the compressor. The refrigerant evaporation through the evaporator is controlled by an externally equalized expansion valve, located inside the evaporator case. FREEZE PROTECTION Under usual operating conditions, when the /C is switched ON, the compressor runs continuously, and the evaporator pressure, and temperature is controlled by the compressor to prevent freeze up. Refrigerant System Protection INFOID:0000000004307054 C D E F G H I MTC K RJI0849E REFRIGERNT PRESSURE SENSOR The refrigerant system is protected against excessively high or low pressures by the refrigerant pressure sensor, located on the condenser. If the system pressure rises above, or falls below the specifications, the refrigerant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the ECM. ECM makes the /C relay go OFF and stops the compressor when pressure on the high-pressure side detected by refrigerant pressure sensor is over about 2,746 kpa (27.46 bar, 28.0 kg/cm 2, 398 psi), or below about 134 kpa (1.34 bar, 1.4 kg/cm 2, 20 psi). PRESSURE RELIEF VLVE The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor. When the pressure of refrigerant in the system increases to an unusual level [more than 3.8 MPa (38 bar, 38.76 kg/cm 2, 551 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into the atmosphere. L M N O P MTC-15
Component Part Location REFRIGERTION SYSTEM INFOID:0000000004307055 SJI0698E MTC-16
OIL OIL Maintenance of Oil Quantity in Compressor INFOID:0000000004307056 The oil in the compressor circulates through the system with the refrigerant. dd oil to compressor when replacing any component or after a large refrigerant leakage occurred. It is important to maintain the specified amount. If oil quantity is not maintained properly, the following malfunctions may result: Lack of oil: May lead to a seized compressor. Excessive oil: Inadequate cooling (thermal exchange interference) OIL TYPE 1 Compressor (CR-10) TYPE 2 Compressor (CSV511) OIL DJUSTING PROCEDURE FOR COMPONENTS REPLCEMENT EXCEPT COMPRESSOR fter replacing any of the following major components, add the correct amount of oil to the system. mount Of Oil To e dded *1: If refrigerant leak is small, no addition of oil is needed. : NISSN /C System Oil Type R : NISSN /C System Oil Type S Oil to be added to system Part replaced mount of oil Remarks m (US fl oz, Imp fl oz) Evaporator 35 (1.2, 1.2) - Condenser 15 (0.5, 0.5) - Liquid tank 5 (0.2, 0.2) - In case of refrigerant leak 30 (1.0, 1.1) Large leak None *1 Small leak *1 OIL DJUSTING PROCEDURE FOR COMPRESSOR REPLCEMENT C D E F G H I MTC K L M N O P MTC-17
OIL WJI1716E 1. New compressor 2. Old compressor 3. Recovery/recycling equipment 4. Measuring cup X 5. Measuring cup Y 6. New oil. Drain oil from the new compressor into clean container D. Install new oil equal to recorded amounts in measuring cups X plus Y. Record amount of oil recovered C. dd an additional 5 m (0.2 US fl oz, 0.2 Imp fl oz) of new oil when replacing liquid tank 1. efore connecting recovery/recycling equipment to vehicle, check recovery/recycling equipment gauges. No refrigerant pressure should be displayed. If NG, recover refrigerant from equipment lines. 2. Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure oil discharged into the recovery/recycling equipment. 3. Drain the oil from the old (removed) compressor into a graduated container and recover the amount of oil drained. 4. Drain the oil from the new compressor into a separate, clean container. 5. Measure an amount of new oil installed equal to amount drained from old compressor. dd this oil to new compressor through the suction port opening. 6. Measure an amount of new oil equal to the amount recovered during discharging. dd this oil to new compressor through the suction port opening. 7. If the liquid tank also needs to be replaced, add another 5 m (0.2 US fl oz, 0.2 Imp fl oz.) of oil at this time. dd this 5 m (0.2 US fl oz, 0.2 Imp fl oz.) of oil only when replacing the compressor. MTC-18
IR CONDITIONER CONTROL Control Operation IR CONDITIONER CONTROL INFOID:0000000004307057 C D E F WJI2189E G 1. Intake door lever 2. Mode door control dial 3. Rear window defogger switch 4. lower control dial 5. /C switch (if equipped) 6. Temperature control dial LOWER CONTROL DIL This dial turns the fan ON and OFF, and controls fan speed. TEMPERTURE CONTROL DIL This dial allows you to adjust the temperature of the discharge air. MODE DOOR CONTROL DIL This dial controls the outlet air flow. INTKE DOOR LEVER Recirculation (REC) position: Interior air is recirculated inside the vehicle. Fresh (FRE) position: Outside air is drawn into the passenger compartment. RER WINDOW DEFOGGER SWITCH When illumination is ON, rear window is defogged. /C SWITCH (IF EQUIPPED) The /C switch controls the air conditioner system. When the switch is depressed with the fan ON, the compressor will turn ON. The indicator lamp also illuminates. H I MTC K L M N O P MTC-19
Discharge ir Flow IR CONDITIONER CONTROL INFOID:0000000004307058 WJI2190E Mode door position ir outlet/distribution Vent Foot Defroster 100% 56% 44% 16% 64% 20% 16% 53% 31% 17% 83% System Description irflow always present at driver and passenger side demisters INFOID:0000000004307059 SWITCHES ND THEIR CONTROL FUNCTION WJI2249E MTC-20
IR CONDITIONER CONTROL C D E WJI2234E F G H I MTC K L M N O P MTC-21
TROULE DIGNOSIS CONSULT-II Function (CM) TROULE DIGNOSIS INFOID:0000000004784392 CONSULT-II can display each diagnostic item using the diagnostic test modes shown following. CM diagnostic test item Inspection by part DT MONITOR Display Item List Diagnostic mode WORK SUPPORT DT MONITOR CTIVE TEST SELF-DIG RESULTS CN DIG SUPPORT MNTR ECU PRT NUMER CONFIGURTION Description Supports inspections and adjustments. Commands are transmitted to the CM for setting the status suitable for required operation, input/output signals are received from the CM and received data is displayed. Displays CM input/output data in real time. Operation of electrical loads can be checked by sending drive signal to them. Displays CM self-diagnosis results. The result of transmit/receive diagnosis of CN communication can be read. CM part number can be read. Performs CM configuration read/write functions. Monitor item name operation or unit IGN ON SW FN ON SIG IR COND SW How to Perform Trouble Diagnosis for Quick and ccurate Repair WORK FLOW ON/OFF ON/OFF ON/OFF Contents Displays IGN Position (ON)/OFF, CC Position (OFF) status as judged from ignition switch signal through the CN communication. Displays FN (ON)/FN (OFF) status as judged from blower fan motor switch signal through CN communication. Displays COMP (ON)/COMP (OFF) status as judged from air conditioner switch signal through the CN communication. INFOID:0000000004307062 SH900E *1 MTC-30, "Operational Check" SYMPTOM TLE Symptom Reference Page ir outlet does not change. Go to Trouble Diagnosis Procedure for Mode Door. MTC-31 Discharge air temperature does not change. Go to Trouble Diagnosis Procedure for ir Mix Door. MTC-32 Intake door does not change. Go to Trouble Diagnosis Procedure for Intake Door. MTC-33 lower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for lower Motor. MTC-33 MTC-22
TROULE DIGNOSIS Symptom Magnet clutch does not engage in /C, defrost/foot, or defrost mode. Component Parts and Harness Connector Location ENGINE COMPRTMENT Reference Page Go to Trouble Diagnosis Procedure for Magnet Clutch. MTC-37 Insufficient cooling Go to Trouble Diagnosis Procedure for Insufficient Cooling. MTC-45 Insufficient heating Go to Trouble Diagnosis Procedure for Insufficient Heating. MTC-52 Noise Go to Trouble Diagnosis Procedure for Noise. MTC-53 INFOID:0000000004307063 C D E F G H I MTC K L M N WJI2235E 1. Refrigerant pressure sensor E17 (if equipped) PSSENGER COMPRTMENT 2. /C compressor F3 (if equipped) O P MTC-23
TROULE DIGNOSIS WJI2302E 1. Front air control M33 2. Front blower motor resistor M151 3. Thermo control amp. jumper connector (with CVT), (if equipped) 4. Thermo control amp. M42 (without CVT), (if equipped) 5. Front blower motor M62 6. Defrost /C switch M41 (located on back side of front air control) MTC-24
Schematic TROULE DIGNOSIS INFOID:0000000004307064 C D E F G H I MTC K L M N O IW0053G P MTC-25
Wiring Diagram - Heater - WITHOUT /C TROULE DIGNOSIS INFOID:0000000004307065 WJW0485E MTC-26
Wiring Diagram - /C,M - TROULE DIGNOSIS INFOID:0000000004307066 C D E F G H I MTC K L M N O WJW0484E P MTC-27
TROULE DIGNOSIS IW0052G MTC-28
TROULE DIGNOSIS C D E F G H I MTC K L M N O WJW0488E P MTC-29
TROULE DIGNOSIS LJW0021E Operational Check INFOID:0000000004307067 The purpose of the operational check is to confirm that the system operates properly. Conditions CHECKING LOWER : Engine running at normal operating temperature MTC-30
TROULE DIGNOSIS 1. Turn blower control dial clockwise to "1" position. lower should operate on low speed. 2. Turn blower control dial clockwise to "2" position, and continue checking blower speed until all speeds are checked. 3. Leave blower on Maximum speed. If NG, go to trouble diagnosis procedure for MTC-33, "Front lower Motor Circuit". If OK, continue the check. CHECKING DISCHRGE IR 1. Turn mode door control dial to each position. 2. Confirm that discharge air comes out according to the air distribution table. Refer to MTC-20, "Discharge ir Flow". If NG, go to trouble diagnosis procedure for MTC-31, "Mode Door". If OK, continue the check. CHECKING RECIRCULTION 1. Set intake door lever to REC position. 2. Operate intake door lever to FRE position. 3. Listen for intake door position change (you should hear blower sound change slightly). If NG, go to trouble diagnosis procedure for MTC-33, "Intake Door". If OK, continue the check. CHECKING TEMPERTURE DECRESE 1. Turn temperature control dial counterclockwise to full cold position. 2. Check for cold air at discharge air outlets. If NG, go to trouble diagnosis procedure for MTC-45, "Insufficient Cooling". If OK, continue the check. CHECKING TEMPERTURE INCRESE 1. Turn temperature control dial clockwise to full hot position. 2. Check for hot air at discharge air outlets. If NG, go to trouble diagnosis procedure for MTC-52, "Insufficient Heating". If OK, continue the check. CHECKING /C SWITCH (IF EQUIPPED) 1. Turn fan control dial to the desired (1 to 4 speed) position. 2. Press /C switch. 3. /C switch indicator will turn ON. Confirm that the compressor clutch engages (sound or visual inspection). If NG, go to trouble diagnosis procedure for MTC-37, "Magnet Clutch Circuit (If Equipped)". If OK, continue the check. CHECKING DEFROST /C SWITCH (IF EQUIPPED) 1. Turn fan control dial to the desired (1 to 4 speed) position. 2. Turn mode dial to ( ) DEF. 3. Confirm that the compressor clutch engages (sound or visual inspection) and the /C switch indicator illuminates. If NG, go to trouble diagnosis procedure for MTC-37, "Magnet Clutch Circuit (If Equipped)". If all operational checks are OK (symptom cannot be duplicated), go to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair" and perform tests as outlined. If symptom appears, refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair" and perform applicable trouble diagnosis procedures. Mode Door INFOID:0000000004307068 C D E F G H I MTC K L M N O P SYMPTOM: ir outlet does not change. INSPECTION FLOW MTC-31
TROULE DIGNOSIS 1.CONFIRM SYMPTOM Y PERFORMING OPERTIONL CHECK - DISCHRGE IR 1. Rotate the mode door control dial to each position. 2. Confirm that discharge air comes out according to the air distribution table. Refer to MTC-20, "Discharge ir Flow". NOTE: Confirm that the compressor clutch (with /C) is engaged (visual inspection) when DEF ( ) or D/F ( ) is selected. Can a symptom be duplicated? YES >> GO TO 3. NO >> GO TO 2. 2.PERFORM COMPLETE OPERTIONL CHECK Perform a complete operational check and check for any symptoms. Refer to MTC-30, "Operational Check". Can a symptom be duplicated? YES >> Refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair". NO >> System OK. 3.CHECK FOR SERVICE ULLETINS Check for any service bulletins. >> GO TO 4. 4.CHECK MODE DOOR CONTROL CLE Check and verify mode door mechanism for smooth operation in each mode. OK >> If the symptom still exists, perform a complete operational check and check for other symptoms. Refer to MTC-30, "Operational Check". If other symptoms exist, refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair". NG >> Repair or adjust mode door control cable. Refer to MTC-65, "Mode Door Cable djustment". ir Mix Door SYMPTOM: ir mix door does not change. INSPECTION FLOW 1.CONFIRM SYMPTOM Y PERFORMING OPERTIONL CHECK - TEMPERTURE INCRESE 1. Turn the temperature control dial clockwise until maximum heat. 2. Check for hot air at discharge air outlets. MTC-32 INFOID:0000000004307069 >> GO TO 2. 2.CONFIRM SYMPTOM Y PERFORMING OPERTIONL CHECK - TEMPERTURE DECRESE 1. Turn the temperature control dial counterclockwise until maximum cold. 2. Check for cold air at discharge air outlets. Can a symptom be duplicated? YES >> GO TO 4. NO >> GO TO 3. 3.PERFORM COMPLETE OPERTIONL CHECK Perform a complete operational check and check for any symptoms. Refer to MTC-30, "Operational Check". Can a symptom be duplicated? YES >> Refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair". NO >> System OK. 4.CHECK FOR SERVICE ULLETINS Check for any service bulletins.
TROULE DIGNOSIS >> GO TO 5. 5.CHECK IR MIX DOOR CONTROL LINKGE Check and verify air mix door mechanism for smooth operation. OK >> If the symptom still exists, perform a complete operational check. Refer to MTC-30, "Operational Check" If other symptoms exist, refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair". NG >> Repair or adjust air mix door control linkage. Refer to MTC-64, "ir Mix Door Cable djustment". Intake Door INFOID:0000000004307070 C D SYMPTOM: Intake door does not change. INSPECTION FLOW 1.CONFIRM SYMPTOM Y PERFORMING OPERTIONL CHECK - REC ( ) 1. Slide the intake door lever to the REC ( ) position. 2. Turn the blower motor to maximum speed. 3. Slide the intake door lever to the FRE position. 4. Listen for intake door position change (you should hear blower sound change slightly). Can a symptom be duplicated? YES >> GO TO 3. NO >> GO TO 2. 2.PERFORM COMPLETE OPERTIONL CHECK Perform a complete operational check and check for any symptoms. Refer to MTC-30, "Operational Check". Can a symptom be duplicated? YES >> Refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair". NO >> System OK. 3.CHECK FOR SERVICE ULLETINS Check for any service bulletins. >> GO TO 4. 4.CHECK INTKE DOOR CONTROL LINKGE Check intake door control linkage mechanism for smooth operation. OK >> If the symptom still exists, perform a complete operational check. Refer to MTC-30, "Operational Check". If other symptoms exist, refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair". NG >> Repair or adjust control linkage. Refer to MTC-63, "Intake Door Cable djustment". Front lower Motor Circuit SYMPTOM: Front blower motor operation is malfunctioning. INSPECTION FLOW INFOID:0000000004307071 1.CONFIRM SYMPTOM Y PERFORMING OPERTIONL CHECK - FRONT LOWER 1. Turn blower control dial to "1" position. lower should operate on low speed. 2. Turn the blower control dial to "2" position, and continue checking blower speed until all speeds are checked. Can the symptom be duplicated? YES >> GO TO 3. E F G H I MTC K L M N O P MTC-33
NO >> GO TO 2. TROULE DIGNOSIS 2.PERFORM COMPLETE OPERTIONL CHECK Perform a complete operational check and check for any symptoms. Refer to MTC-30, "Operational Check". Can a symptom be duplicated? YES >> Refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair". NO >> System OK. 3.CHECK FOR SERVICE ULLETINS Check for any service bulletins. >> GO TO 4. 4.CHECK FRONT LOWER MOTOR CIRCUIT Check front blower motor circuit. Refer to "DIGNOSTIC PROCEDURE FOR FRONT LOWER MOTOR". OK >> If the symptom still exists, perform a complete operational check. Refer to MTC-30, "Operational Check". If other symptoms exist, refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair". NG >> Repair as necessary. DIGNOSTIC PROCEDURE FOR FRONT LOWER MOTOR SYMPTOM: lower motor operation is malfunctioning. WJI2259E 1.CHECK FRONT LOWER MOTOR OPERTION 1. Turn ignition switch ON. 2. Check front blower motor operation at each fan speed. OK >> Inspection End. NG >> Front blower motor does not operate at any speed, GO TO 2. Front blower motor does not operate at one or more of the four speeds, GO TO 10. 2.CHECK POWER SUPPLY FOR FRONT LOWER MOTOR 1. Turn ignition switch OFF. 2. Disconnect front blower motor connector. 3. Turn ignition switch ON. 4. Check voltage between front blower motor harness connector M62 terminal 1 and ground. Terminals Voltage (+) ( ) (pprox.) Connector Terminal Front blower Ground 1 attery voltage motor: M62 OK >> GO TO 6. MTC-34 WJI2228E
TROULE DIGNOSIS NG >> Check power supply circuit and 15 fuses [Nos. 15 and 17, located in the fuse block (J/)]. Refer to PG-3, "Schematic". If fuses are OK, reinstall fuses and GO TO 3. If fuses are NG, replace fuse and check harness for short circuit. Repair or replace if necessary. 3.CHECK LOWER MOTOR RELY POWER SUPPLY CIRCUITS 1. Turn ignition switch OFF. 2. Disconnect blower motor relay connector. 3. Turn ignition switch ON. 4. Check voltage between blower motor relay harness connector J- 1 terminal 1, 5 and ground. 1 - Ground attery voltage should exist. 5 - Ground attery voltage should exist. OK >> GO TO 4. NG >> Repair harness or connector. 4.CHECK LOWER MOTOR RELY (SWITCH SIDE) CIRCUIT FOR OPEN 1. Turn ignition switch OFF. 2. Check continuity between blower motor relay harness connector J-1 () terminal 3 and front blower motor harness connector M62 () terminal 1. Continuity should exist. OK >> GO TO 5. NG >> Repair harness or connector. WJI1783E C D E F G H I 5.CHECK LOWER MOTOR RELY GROUND CIRCUIT Check continuity between blower motor relay harness connector J-1 terminal 2 and ground. Continuity should exist. OK >> Replace blower motor relay. NG >> Repair harness or connector. 6.CHECK FRONT LOWER MOTOR Check continuity between front blower motor terminals 1 and 2. NOTE: Ensure that there are no foreign particles inside the /C unit assembly for a smooth rotation of the front blower motor. WJI2263E WJI2264E MTC K L M N O 1-2 : Continuity should exist. OK >> GO TO 7. NG >> Replace front blower motor. Refer to MTC-62, "Removal and Installation". 7.CHECK CIRCUIT CONTINUITY ETWEEN FRONT LOWER MOTOR ND FRONT IR CONTROL WJI2230E P MTC-35
TROULE DIGNOSIS 1. Disconnect front air control connector. 2. Check continuity between front blower motor harness connector M62 () terminal 2 and front air control harness connector M33 () terminal 13. 2-13 : Continuity should exist. OK >> GO TO 8. NG >> Repair harness or connector. 8.CHECK FN SWITCH Check continuity between front air control terminal 9 and 10, 11, 12, 13, 14. WII0339ZZ 9 Terminals Condition Continuity 14 lower control dial: OFF 10 lower control dial: 1-speed 11 lower control dial: 2-speed 12 lower control dial: 3-speed 13 lower control dial: 4-speed OK >> GO TO 9. NG >> Replace front air control. Refer to MTC-58, "Removal and Installation". 9.CHECK FN SWITCH GROUND CIRCUIT Check continuity between front air control harness connector M33 terminal 9 and ground. Yes SJI0732E Continuity should exist. OK >> Inspection End. NG >> Repair harness or connector. 10.CHECK CIRCUIT CONTINUITY ETWEEN FRONT IR CONTROL ND FRONT LOWER MOTOR RESISTOR 1. Turn ignition switch OFF. 2. Disconnect front blower motor resistor and front air control connectors. 3. Check continuity between front air control harness connector M33 () terminals and front blower motor resistor harness connector M6 () terminals. SJI0734E Connector Terminal Connector Terminal Front air control: M33 10 1 11 Front blower 2 motor resistor: 12 M6 3 13 4 MTC-36 Continuity Yes SJI0733E
TROULE DIGNOSIS OK >> GO TO 11. NG >> Repair harness or connector. 11.CHECK FN SWITCH Check continuity between front air control terminal 9 and 10, 11, 12, 13, 14. 9 Terminals Condition Continuity OK >> Replace the front blower motor resistor. Refer to MTC-66, "Removal and Installation". NG >> Replace front air control. Refer to MTC-58, "Removal and Installation". Magnet Clutch Circuit (If Equipped) SYMPTOM: Magnet clutch does not engage. INSPECTION FLOW 14 Fan control dial: OFF 10 Fan control dial: 1-speed 11 Fan control dial: 2-speed 12 Fan control dial: 3-speed 13 Fan control dial: 4-speed 1.CONFIRM SYMPTOM Y PERFORMING OPERTIONL CHECK - MGNET CLUTCH 1. Turn ignition switch ON. 2. Turn blower control dial to the desired (1 to 4 speed) position. 3. Press the /C switch. /C indicator will turn on. 4. Confirm that the compressor clutch engages (sound or visual inspection). Can the symptom be duplicated? YES >> GO TO 3. NO >> GO TO 2. 2.CHECK FOR NY SYMPTOMS Perform a complete operational check for any symptoms. Refer to MTC-30, "Operational Check". Does another symptom exist? YES >> Refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair". NO >> System OK. 3.CHECK FOR SERVICE ULLETINS Check for any service bulletins. INFOID:0000000004307072 >> GO TO 4. 4.CHECK COMPRESSOR ELT TENSION Check compressor belt tension. Refer to EM-14, "Checking" (HR16DE) or EM-136, "Checking Drive elts" (MR18DE). OK >> GO TO 5. NG >> djust or replace /C compressor belt. Refer to EM-15, "Removal and Installation" (HR16DE) or EM-136, "Removal and Installation" (MR18DE). 5.CHECK REFRIGERNT PRESSURE Check refrigerant pressure with manifold gauge connected. Refer to MTC-45, "Insufficient Cooling". OK >> GO TO 6. NG >> Perform trouble diagnosis for unusual pressure. Refer to MTC-45, "Insufficient Cooling". Yes SJI0732E C D E F G H I MTC K L M N O P MTC-37
TROULE DIGNOSIS 6.CHECK MGNET CLUTCH CIRCUIT Perform diagnostic procedure for the magnetic clutch. Refer to "DIGNOSTIC PROCEDURE FOR MGNET CLUTCH". OK >> If the symptom still exists, perform a complete operational check. Refer to MTC-30, "Operational Check". If other symptoms exist, refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and ccurate Repair". NG >> Repair as necessary. SYSTEM DESCRIPTION Thermo control amp. controls /C compressor operation by intake air temperature and signal from ECM. The defrost /C switch controls /C compressor operation by the CM when the mode switch is turned to the (DEF) position. Low Temperature Protection Control When intake air temperatures are higher than 4 C (39 F), the compressor turns ON. The compressor turns OFF when intake air temperatures are lower than 2 C (36 F). DIGNOSTIC PROCEDURE FOR MGNET CLUTCH SYMPTOM: Magnet clutch does not engage in /C, defrost/foot, or defrost mode. SJI0741E 1.PERFORM UTO CTIVE TEST Refer to PG-19, "uto ctive Test". Does the magnet clutch operate? YES >> GO TO 5. NO >> Check 10 fuse (No. 42, located in the IPDM E/R). Refer to PG-23, "IPDM E/R Terminal rrangement - Type ". If fuse is OK, GO TO 2. If fuse is NG, replace fuse and check harness for short circuit. Repair or replace if necessary. 2.CHECK POWER SUPPLY FOR IPDM E/R Check power supply to 10 fuse (No. 42 located in the IPDM E/R). MTC-38 WJI2250E
TROULE DIGNOSIS :attery voltage should exist OK >> GO TO 3. NG >> Check harness for open circuit. Repair or replace if necessary. 3.CHECK POWER SUPPLY FOR /C COMPRESSOR 1. Disconnect /C compressor connector. 2. Start the engine. 3. Turn blower control dial and /C switch ON. 4. Check voltage between /C compressor harness connector F3 terminal 1 and ground. 1 - Ground :attery voltage OK >> Replace magnet clutch. Refer to MTC-78, "Removal and Installation of Compressor - HR16DE" or MTC-80, "Removal and Installation of Compressor - MR18DE". NG >> GO TO 4. 4.CHECK CIRCUIT CONTINUITY ETWEEN IPDM E/R ND COMPRESSOR 1. Turn ignition switch OFF. 2. Disconnect IPDM E/R connector. 3. Check continuity between /C compressor harness connector F3 () terminal 1 and IPDM E/R harness connector E43 () terminal 11. 1-11 :Continuity should exist OK >> Replace IPDM E/R. Refer to PG-27, "Removal and Installation of IPDM E/R". NG >> Repair harness or connector. 5.CHECK DEFROST /C SWITCH 1. Start the engine. 2. Turn the mode control dial to (DEF) position. Does the magnet clutch operate OK >> GO TO 6. NG >> GO TO 23. 6.CHECK CM INPUT (COMPRESSOR ON) SIGNL 1. Turn ignition switch OFF. 2. Check compressor ON/OFF signal. Refer to MTC-22, "CONSULT-II Function (CM)". /C SW ON /C SW OFF : IR COND SW ON : IR COND SW OFF OK >> GO TO 8. NG >> GO TO 7. 7.CHECK CIRCUIT CONTINUITY ETWEEN FRONT IR CONTROL ND CM SJI0743E WJI2233E C D E F G H I MTC K L M N O P MTC-39