Heating, Air Conditioning & Ventilation: Other Mitsubishi Outlander III

SAFETY PRECAUTIONS

Because R-134a refrigerant is a hydro fluorocarbon (HFC) which contains hydrogen atoms in place of chlorine atoms, it will not cause damage to the ozone layer.

Ozone filters out harmful radiation from the sun. To assist in protecting the ozone layer, Mitsubishi Motors Corporation recommends an R-134a refrigerant recycling device.

Refrigerant R-134a is transparent and colorless in both the liquid and vapor state. Since it has a boiling point of -29.8°C (-21.64°F) at atmospheric pressure, it will be a vapor at all normal temperatures and pressures. The vapor is heavier than air, non-flammable, and non-explosive. The following precautions must be observed when handling R-134a.

R-134a evaporates so rapidly at normal atmospheric pressures and temperatures that it tends to freeze anything it contacts. For this reason, extreme care must be taken to prevent any liquid refrigerant from contacting the skin and especially the eyes. Always wear safety goggles when servicing the refrigeration part of the A/C system. Keep a bottle of sterile mineral oil handy when working on the refrigeration system.

1. Should any liquid refrigerant get into your eyes, use a few drops of mineral oil to wash them out. R-134a is rapidly absorbed by the oil.
2. Next, splash your eyes with plenty of cold water.
3. Call your doctor immediately even if irritation has ceased. CAUTION: Keep R-134a containers upright when charging the system. In most instances, moderate heat is required to bring the pressure of the refrigerant in its container above the pressure of the system when charging or adding refrigerant. A bucket or large pan of hot water not over 40°C (104.0°F) is all the heat required for this purpose. Do not heat the refrigerant container with a blow torch or any other means that would raise temperature and pressure above this temperature. Do not weld or steam-clean on or near the system components or refrigerant lines. WARNING: The leak detector for R-134a should be used to check for refrigerant gas leaks. CAUTION: Do not allow liquid refrigerant to touch bright metal or it will be stained. When metering R-134a into the refrigeration system, keep the supply tank or cans in an upright position. If the refrigerant container is on its side or upside down, liquid refrigerant will enter the system and damage the compressor. Refrigerant will tarnish bright metal and chrome surfaces, and in combination with moisture can severely corrode all metal surfaces.

CONDENSER FAN AND RADIATOR FAN CONTROL

The ECM judges the required revolution speed of radiator fan motor and condenser fan motor using the input signals transmitted from A/C switch, secondary pulley speed sensor < CVT > or vehicle speed sensor (VSS) < M/T > and engine coolant temperature sensor.

When operating the A/C switch

1. The air thermo sensor, which senses the temperature of the air flowing out of the evaporator, deactivates the compressor at 1°C (33.8°F) or below.
2. The dual pressure switch turns OFF when the refrigerant pressure becomes excessively high or low, thus protecting the compressor circuit (See «A/C COMPRESSOR CLUTCH RELAY ON CONDITIONS»(ref-593020-S20075194532014011300000) ).
3. When the air thermo sensor is activated, and the ignition switch, blower switch, and A/C switch are ON, the A/C compressor clutch relay is energized.

When operating the mode selection dial

1. The A/C will work when the mode selection dial is set to the "Defroster" or "Defroster/foot" position, or the temperature control dial is set to the "MAX A/C" position. In other dial positions, when the A/C switch is turned on, the A/C will work.

A/C Compressor Clutch Relay ON Conditions

A/C COMPRESSOR CLUTCH RELAY ON CONDITIONS

LUBRICANTS

LUBRICANTS

CAUTION LABELS

The refrigerant gas caution label must be affixed in the location shown in the illustration. Follow the instructions on the label when servicing.

Scheme 70

CAUTION LABEL REFERENCE

Scheme 71

CHECK OF FREEZE FRAME DATA

The freeze frame data can be checked by using the scan tool ( HOW TO COPE WITH INTERMITTENT MALFUNCTION ).

When detecting fault and storing the DTC, the ECU connected to CAN bus line obtains the data before the determination of the DTC and the data when the DTC is determined, and then stores the ECU status of that time. By analyzing the data from scan tool, the troubleshooting can be performed more efficiently. The displayed items are as shown in the table below.

DISPLAY ITEM LIST

FUNCTION

Compressor that recovers the refrigerant, which evaporated in the evaporator and became a high-temperature and high-pressure gas, and turns it into liquid again.

PROBABLE CAUSES

1. Insufficient refrigerant
2. Malfunction of connector.
3. Malfunction of the harness (A/C compressor circuit is open/shorted to ground)
4. Malfunction of the A/C pressure sensor.
5. Malfunction of the A/C compressor.
6. Malfunction of the A/C compressor clutch relay.
7. Malfunction of the A/C control panel.

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1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(ref-593020-S08360406052014011300000) ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus lines (Refer to «PRECAUTIONS ON HOW TO REPAIR THE CAN BUS LINES»(ref-593004-S19013507682014011300000) ).
2. STEP 2. Using scan tool MB991958, read the diagnostic trouble code. Check if an A/C-ECU DTC is set. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Check if the DTC is set. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC set? YES: Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-593020-S18380009522014011300000) . NO: Go to Step 3.
3. STEP 3. Check A/C compressor and clutch assembly connector B-115 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is A/C compressor and clutch assembly connector B-115 in good condition? YES: Go to Step 4. NO: Repair or replace the connector. Refer to «HARNESS CONNECTOR INSPECTION»(ref-592997-S03318112612014011300000) .
4. STEP 4. Check the A/C compressor clutch operation. Connect the compressor connector terminal to the battery positive (+) terminal and ground the battery's negative (-) terminal to the compressor unit. At that time, the A/C compressor clutch should make a definite operating sound. Q: Can the sound (click) of the A/C compressor clutch operation be heard? YES: Go to Step 5. NO: Replace the compressor magnet clutch.
5. STEP 5. Check A/C compressor clutch relay connector A-20X for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is A/C compressor clutch relay connector A-20X in good condition? YES: Go to Step 6. NO: Repair or replace the connector. Refer to «HARNESS CONNECTOR INSPECTION»(ref-592997-S03318112612014011300000) .
6. STEP 6. Check the A/C compressor clutch relay continuity. Follow the table below to check the A/C compressor clutch relay for continuity. TESTER CONNECTION SPECIFIED CONDITION BATTERY VOLTAGE TESTER CONNECTION SPECIFIED CONDITION Not applied 3 - 4 Open circuit Connect terminal 2 to the positive battery terminal Connect terminal 1 to the negative battery terminal 3 - 4 Less than 2 ohms Q: Is the A/C compressor clutch relay in good condition? YES: Go to Step 7. NO: Replace the A/C compressor clutch relay.
7. STEP 7. Check engine control module connector B-27 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Is engine control module connector B-27 in good condition? YES: Go to Step 8. NO: Repair or replace the connector. Refer to «HARNESS CONNECTOR INSPECTION»(ref-592997-S03318112612014011300000) .
8. STEP 8. Measure the voltage at A/C compressor and clutch assembly connector B-115. Disconnect A/C compressor and clutch assembly connector B-115 and measure the voltage at the wiring harness side. Disconnect engine control module connector B-27 and ground harness side terminal No. 102. Turn the ignition switch to the "ON" position. A/C compressor and clutch assembly connector B-115 terminal 1 and ground. The measured value should be approximately 12 volts (battery positive voltage). Q: Is the measured voltage approximately 12 volts? YES: Go to Step 13 . NO: Go to Step 9.
9. STEP 9. Measure the voltage at A/C compressor clutch relay connector A-20X. Disconnect A/C compressor clutch relay connector A-20X and measure the voltage at the relay box side. Turn the ignition switch to the "ON" position. Measure the voltage between terminal 4 and ground. The measured value should be approximately 12 volts (battery positive voltage). Measure the voltage between terminal 2 and ground. The measured value should be approximately 12 volts (battery positive voltage). Q: Is the measured voltage approximately 12 volts? YES: Go to Step 11 . NO: Go to Step 10.
10. STEP 10. Check the wiring harness between A/C compressor clutch relay connector A-20X (terminals 2 and 4) and the fusible link (36). Check the A/C compressor clutch relay power supply line for open circuit. Q: Is the wiring harness between A/C compressor clutch relay connector A-20X (terminals 2 and 4) and the fusible link (36) in good condition? YES: It can be assumed that this malfunction is intermittent. Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592971-S42664974692014011300000) . NO: Repair the wiring harness. Check that the A/C works normally.
11. STEP 11. Check the wiring harness between A/C compressor clutch relay connector A-20X (terminal 3) and A/C compressor and clutch assembly connector B-115 (terminal 1). NOTE: Also check intermediate connector A-17 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector A-17 is damaged, repair or replace the connector as described in «HARNESS CONNECTOR INSPECTION»(ref-592997-S03318112612014011300000) . Check the A/C compressor assembly power supply line for open circuit. Q: Is the wiring harness between A/C compressor clutch relay connector A-20X (terminal 3) and A/C compressor and clutch assembly connector B-115 (terminal 1) in good condition? YES: Go to Step 12. NO: Repair the wiring harness. Check that the A/C works normally.
12. STEP 12. Check the wiring harness between engine control module connector B-27 (terminal 102) and A/C compressor clutch relay connector A-20X (terminal 1). Check the powertrain control module signal line for open and short circuit. Q: Is the wiring harness between engine control module connector B-27 (terminal 102) and A/C compressor clutch relay connector A-20X (terminal 1) in good condition? YES: It can be assumed that this malfunction is intermittent. Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(ref-592971-S42664974692014011300000) . NO: Repair the wiring harness. Check that the A/C works normally.
13. STEP 13. Check the refrigerant temperature switch. CAUTION: Do not heat more than necessary. Dip the metal part of the cooling temperature switch into engine oil and increase the oil temperature using a gas burner or similar. When the oil temperature reaches the standard value, check that resistance is supplied between the terminals. Standard value TEMPERATURE SPECIFICATIONS ITEM TEMPERATURE Less than 2 ohms Slightly below 120°C (248°F) No continuity 135°C (275°F) or more NOTE: When the oil temperature is 135°C (275°F) or more and there is no continuity, the resistance will not be 2ohms or lower until the oil temperature reduces to 120°C (248°F) or less. Q: Is the refrigerant temperature switch operating properly? YES: Go to Step 14. NO: Replace the refrigerant temperature switch. Check that the A/C works normally.
14. STEP 14. Replace the A/C control panel. Q: Does the A/C operate normally? YES: No action is necessary and testing is complete. NO: Replace the powertrain control module. Check that the A/C works normally.

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DATA LIST REFERENCE TABLE

Refer to DATA LIST REFERENCE TABLE .

CHARGING

Use the refrigerant recovery station to charge the refrigerant.

METHOD BY USING REFRIGERANT RECOVERY AND RECYCLING UNIT

Using the refrigerant recovery and recycling unit, refill the refrigerant.

Note. Refer to the Refrigerant Recovery and Recycling Unit's Instruction Manual for operation of the unit.

DISCHARGING SYSTEM

Use the refrigerant recovery unit to discharge refrigerant gas from the system.

Note. Refer to the Refrigerant Recovery and Recycling Unit's Instruction Manual for operation of the unit.

REFRIGERANT GAS PRESSURE CHECK

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1. Check that the engine and A/C are stopped.
2. Close the high-pressure valve of the gauge manifold.
3. Connect the charging hose (red) to the hi-pressure side of the gauge manifold.
4. Connect the quick joint (for high pressure) to the charging hose (red).
5. Install the quick joint (for high pressure) to the high-pressure side service valve of the vehicle.
6. Close the low-pressure valve of the gauge manifold.
7. Connect the charging hose (blue) to the low-pressure side of the gauge manifold.
8. Connect the quick joint (for low pressure) to the charging hose (blue).
9. Install the quick joint (for low pressure) to the low-pressure side service valve of the vehicle.
10. Start and fully warm up the engine, and then check that the engine speed of the test condition is satisfied.
11. Set the A/C control panel to the mode instructed in the test conditions.
12. Measure the high pressure/low pressure, and check that the measurement is within the permissible range shown in the table below. If the value is outside the permissible range, refer to the result of the «COOLING PERFORMANCE CHECK»(ref-593020-S03992874732014011300000) , and perform a check according to «PROBLEM SYMPTOMS CHART»(ref-593020-S31192430802014011300000) . NOTE: Prior to the measurement, wait until the refrigerant pressure is stable. (Approximately 10 minutes after A/C operation start) AMBIENT TEMPERATURE AND REFRIGERANT PRESSURE CHART Garage ambient temperature °C (°F) 20 (68) 25 (77) 30 (86) 35 (95) 40 (104) 45 (113) 50 (122) Compressor high pressure kPa (psi) 370 - 790 (53.7 - 114.6) 600 - 1, 020 (87.0 - 147.9) 830 - 1, 250 (120.4 - 181.3) 1, 060 - 1, 480 (153.7 - 214.6) 1, 290 - 1, 710 (187.1 - 248.0) 1, 520 - 1, 940 (220.4 - 281.4) 1, 750 - 2, 170 (253.8 - 314.7) Compressor low pressure kPa (psi) 80 - 270 (11.6 - 39.2) 130 - 320 (18.9 - 46.4) 180 - 370 (26.1 - 53.7) 230 - 420 (33.4 - 60.9) 270 - 470 (39.2 - 68.2) 320 - 510 (46.4 - 74.0) 370 - 560 (53.7 - 81.2)

LOST CHARGE

If the system has lost all charge due to a leak

1. Evacuate the system. (Refer to «COMPRESSOR DRIVE BELT ADJUSTMENT»(ref-593020-S14850773132014011300000) ).
2. Charge the system with approximately 0.453 kg (1 pound) of refrigerant.
3. Check for leaks.
4. Discharge the system.
5. Repair leaks. CAUTION: Replacement filter-drier units must be sealed while in storage. The drier used in these units will saturate water quickly upon exposure to the atmosphere. When installing a drier, have all tools and supplies ready for quick assembly to avoid keeping the system open any longer than necessary.
6. Replace receiver drier.
7. Evacuate and charge system.

LOW CHARGE

If the system has not lost all of its refrigerant charge; locate and repair all leaks. If it is necessary to increase the system pressure to find the leak (because of an especially low charge) add refrigerant. If it is possible to repair the leak without discharging the refrigerant system, use the procedure for correcting low refrigerant level.

HANDLING TUBING AND FITTINGS

Kinks in the refrigerant tubing or sharp bends in the refrigerant hose lines will greatly reduce the capacity of the entire system. High pressures are produced in the system when it is operating. Extreme care must be exercised to make sure that all connections are pressure tight. Dirt and moisture can enter the system when it is opened for repair or replacement of lines or components. The following precautions must be observed. The system must be completely discharged before opening any fitting of connection in the refrigeration system. Open fittings with caution even after the system has been discharged. If any pressure is noticed as a fitting is loosened, allow trapped pressure to bleed off very slowly.

Never attempt to re-bend formed lines to fit. Use the correct line for the installation you are servicing. A good rule for the flexible hose lines is keep the radius of all bends at least 10 times the diameter of the hose.

Sharper bends will reduce the flow of refrigerant. The flexible hose lines should be routed so that they are at least 80 mm (3.1 inches) from the exhaust manifold. It is good practice to inspect all flexible hose lines at least once a year to make sure they are in good condition and properly routed.

On standard plumbing fittings with O-rings, these O-rings are not reusable.

A/C COMPRESSOR CLUTCH RELAY CONTINUITY CHECK

A/C COMPRESSOR CLUTCH RELAY CONTINUITY CHECK

BLOWER RELAY CONTINUITY CHECK

BLOWER RELAY CONTINUITY CHECK

<< A >> SUCTION PIPE AND LIQUID PIPE DISCONNECTION

To prevent the entry of dust or other foreign bodies, plug the dismantled hose and the nipples of the expansion valves.

AIR THERMO SENSOR CHECK

Measure the resistance between the sensor terminals under at least two temperatures. The resistance values should meet the values shown in the illustration.

Note. The temperature should be within the range shown in the illustration.

Scheme 83

BLOWER MOTOR CHECK

Check that the motor turns when applying battery power between the connector terminals. Also check to see that there is no abnormal sound emitted from the motor at this time..

Scheme 84

AMBIENT AIR TEMPERATURE SENSOR CHECK

Measure the resistance between the sensor terminals under at least two temperatures. The resistance values should meet the values shown in the illustration.

Note. The temperature should be within the range shown in the illustration.

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Note. The service points which are not described are the same as before.

<< A >> FLEXIBLE DISCHARGE HOSE/FLEXIBLE SUCTION HOSE DISCONNECTION

To prevent the entry of dust or other foreign bodies, plug the dismantled hoses and compressor nipples.

>> B << FIELD CORE ATTACHMENT

Line up the pin hole on the compressor unit with the field core projection and attach.

Scheme 88

A/C REFRIGERANT TEMPERATURE SWITCH

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1. Dip the metal part of the A/C refrigerant temperature switch into engine oil and increase the oil temperature using a gas burner or similar.
2. When the oil temperature reaches the standard value, check that voltage is supplied between the terminals. Standard value: TEMPERATURE AND RESISTANCE Item Temperature Less than 2 ohms Slightly below 120°C (248°F) No continuity 135°C (275°F) or more NOTE: When the oil temperature is 135°C (275°F) or more and there is no continuity, the resistance will not be 2ohms or lower until the oil temperature reduces to 120°C (248°F) or less.

Scheme 91

<< A >> DISCHARGE FLEXIBLE HOSE/LIQUID PIPE A DISCONNECTION

Plug the removed nipple of the pipe, hose and condenser to prevent the entry of dust and dirt.

Scheme 92

1. Lift the condenser while pressing the claw B, and disengage it.
2. While pressing the claw A, lift and remove the condenser.

Scheme 93