GENERAL DESCRIPTION
The blower, heater, and evaporator have been integrated with the heater and A/C system to achieve greater fan power and noise reduction.
| ITEM | SPECIFICATION |
|---|---|
| Heater control assembly | Dial type |
| Compressor mode | QS90 |
| Compressor type | Scroll type |
| Refrigerant and quantity g (oz.) | R-134a (HFC-134a), 480 - 520 (16.9 - 18.3) |
AUTOMATIC AIR CONDITIONING SYSTEM SPECIFICATION CHART
SAFETY PRECAUTIONS
| WARNING | Wear safety goggles and gloves when servicing the refrigeration system to prevent severe damage to eyes and hands. |
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.
| WARNING | Do not heat R-134a above 40°C (104.0°F) or it may catch fire and explode. |
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.
- 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.
- Next, splash your eyes with plenty of cold water.
- 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 | A 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, output shaft speed sensor and engine coolant temperature sensor.
COMPRESSOR CONTROL
When operating the A/C switch
- 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.
- A/C-ECU detect refrigerant pressure by A/C pressure sensor and turns OFF when the refrigerant pressure becomes excessively high or low, thus protecting the compressor circuit (See «A/C COMPRESSOR CLUTCH RELAY ON CONDITIONS REFERENCE»(/mitsubishi/lancer-evolution/x-2007-2016/remont/automatic-hvac-system/#automatic-air-conditioning-except-lancer-evolution) table below).
- 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
- 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
| Ignition switch (IG2) | ON | NOTE: A/C compressor clutch relay is de-energized when any one switch, sensor or control unit shown in this table turns off. NOTE: The components marked by * communicate with the ECU. If the air thermo sensor detects a temperature of 1°C (33.8°F), the A/C-ECU will turn off the A/C compressor clutch relay. | |
|---|---|---|---|
| Blower switch | ON | ||
| A/C switch, mode selection dial defroster, defroster/foot position or temperature control MAX A/C | ON | ||
| Air thermo sensor | * | ||
| Pressure detected by A/C pressure sensor | 2.94 MPa (427 psi) or less (If the refrigerant pressure exceeds 2.94 MPa (427 psi), A/C compressor clutch relay is not ON condition until the refrigerant pressure has been measured up to 2.35 MPa (341 psi) a or less.) | ON | |
| 0.19 MPa (27 psi) or more (If the refrigerant pressure falls short of 0.19 MPa (27 psi), A/C compressor clutch relay is not ON condition until the refrigerant pressure has been measured up to 0.22 MPa (32 psi) or more.) | |||
| A/C compressor clutch relay driving transistor (within powertrain control module) | ON | ||
| NOTE |
|---|
| A/C compressor clutch relay is de-energized when any one switch, sensor or control unit shown in this table turns off. |
| NOTE |
|---|
| The components marked by * communicate with the ECU. If the air thermo sensor detects a temperature of 1°C (33.8°F), the A/C-ECU will turn off the A/C compressor clutch relay. |
A/C COMPRESSOR CLUTCH RELAY ON CONDITIONS REFERENCE
INTRODUCTION
After air is taken in through the air selection damper, it is fed to the evaporator by the blower fan and motor and cooled. The air cooled by the evaporator is mixed appropriately with the warmed air which pass through the heater core to achieve a comfortable temperature. If the A/C does not operate or the cooled air is not discharged, the system components or relay may be faulty.
AUTOMATIC AIR CONDITIONING TROUBLESHOOTING STRATEGY
Use these steps to plan your diagnostic strategy. If you follow them carefully, you will be sure that you have exhausted most of the possible ways to find a heater, air conditioning and ventilation fault.
- Gather information from the customer.
- Verify that the condition described by the customer exists.
- Find the malfunction by following the Symptom Chart.
- Verify malfunction is eliminated.
HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)
Required Special Tools
- MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
| 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. |
Scheme 92
- Ensure that the ignition switch is at the "LOCK" (OFF) position.
- Start up the personal computer.
- Connect special tool MB991827 to special tool MB991824 and the personal computer.
- Connect special tool MB991910 to special tool MB991824
- Connect special tool MB991910 to the data link connector.
- Turn the power switch of special tool MB991824 to the "ON" position. NOTE: When the special tool MB991824 is energized, the special tool MB991824 indicator light will be illuminated in a green color.
- Start the M.U.T.-III system on the personal computer. NOTE: Disconnecting the scan tool special tool MB991824 is the reverse of the connecting sequence, making sure that the ignition switch is at the "LOCK" (OFF) position.
HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES
Required Special Tools
- MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
| 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. |
Note. If the battery voltage is low, diagnostic trouble codes will not be output. Check the battery if scan tool MB991958 does not display.
- Connect the scan tool MB991958 to the data link connector.
- Turn the ignition switch to the "ON" position.
- Select "System select" from the start-up screen.
- Select "From 2011 MY" of "Model Year." When the "Vehicle Information" is displayed, check the contents.
- Select "AUTO A/C" from "System List," and press the "OK" button. NOTE: When the "Loading Option Setup" list is displayed, check the applicable item.
- Select "Diagnostic Trouble Code" to read the DTC.
- If a DTC is set, it is shown.
- Choose "Erase DTCs" to erase the DTC.
HOW TO READ DATA LIST
Required Special Tools
- MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
| 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 the scan tool MB991958 to the data link connector.
- Turn the ignition switch to the "ON" position.
- Select "Interactive Diagnosis" from the start-up screen.
- Select "System Select." Select "AUTO A/C" from "System List," and press the "OK" button.
- Select "Data List."
- Choose an appropriate item and select the "OK" button.
HOW TO PERFORM ACTUATOR TEST
Required Special Tools
- MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
| 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 the scan tool MB991958 to the data link connector.
- Turn the ignition switch to the "ON" position.
- Select "System Select."
- Select "AUTO A/C" from "System List," and press the "OK" button.
- Choose "Actuator Test" from "AUTO A/C" screen.
- Choose an appropriate item and select the "OK" button.
HOW TO DIAGNOSE THE CAN BUS LINE
Required Special Tools
- MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A
| 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 to the data link connector.
- Turn the ignition switch to the "ON" position.
- Select "CAN bus diagnosis" from the start-up screen.
- When the vehicle information is displayed, confirm that it matches the vehicle whose CAN bus lines will be diagnosed. If they match, go to step 8 . If not, go to step 5.
- Select "view vehicle information" button.
- When the vehicle information is displayed, confirm again that it matches the vehicle which is diagnosed CAN bus line. If they match, go to step 8 . If not, go to step 5 .
- Press the "OK" button.
- When the options are displayed, choose the options (mark the check) and then select "OK".
CHECK OF FREEZE FRAME DATA
The freeze frame data can be checked by using the scan tool (refer to 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.
| Item No. | Item name | Data item | Unit |
|---|---|---|---|
| 01 | Odometer | Total driving distance after the diagnostic trouble code is generated | Mile (1) |
| 02 | Ignition cycle | Number of times the ignition switch is turned "ON" or "LOCK (OFF)" after the past failure transition | Number of counts is displayed. |
| 04 | Current trouble accumulative time | Cumulative time for current malfunction of diagnostic trouble code | Min |
| (1) If a failure occurs to both the ABS-ECU and ETACS-ECU, 0000 km or FFFF mile is displayed to the scan tool MB991958. | |||
| (1) | If a failure occurs to both the ABS-ECU and ETACS-ECU, 0000 km or FFFF mile is displayed to the scan tool MB991958. |
DISPLAY ITEM LIST
DIAGNOSTIC TROUBLE CODE CHART
| CAUTION | During diagnosis, a DTC code associated with another system may be set when the ignition switch is turned on with connector(s) disconnected. After completing the repair, confirm all systems for DTC code(s). If DTC code(s) are set, erase them all. |
| Diagnostic trouble code No. | Diagnostic item |
|---|---|
| B10C0 | Interior temperature sensor system (short circuit) |
| B10C1 | Interior temperature sensor system (open circuit) |
| B1000 | Control panel communication error |
| B1003 | Mode dial SW error |
| B1018 | Temperature control dial SW error |
| B1021 | Fan dial SW error |
| B1031 | Air thermo sensor system (short circuit) |
| B1032 | Air thermo sensor system (open circuit) |
| B1034* | Ambient air temperature sensor system (short circuit) |
| B1035* | Ambient air temperature sensor system (open circuit) |
| B1079 | Refrigerant leaks |
| B2214 | Control panel failure |
| U1415 | Coding not completed |
| U0019 | Bus off (CAN1) |
| U0141 | ETACS-ECU time-out |
| U0151 | SRS-ECU time-out |
| U0154 | Occupant classification-ECU time-out |
| U0155 | Combination meter time-out |
| U0168 | WCM time-out |
| U0184 | Audio time-out |
| U0195 | Satellite radio tuner time-out |
| U0197 | Hands free module time-out |
| NOTE: The diagnostic trouble codes marked by * are set from the ETACS-ECU. For all codes except B10C0 and B10C1, refer to DIAGNOSTIC TROUBLE CODE CHART . | |
| NOTE |
|---|
| The diagnostic trouble codes marked by * are set from the ETACS-ECU. For all codes except B10C0 and B10C1, refer to DIAGNOSTIC TROUBLE CODE CHART . |
DIAGNOSTIC TROUBLE CODE REFERENCE CHART
Scheme 93
DTC SET CONDITION
- DTC B10C0 is set if there is a short circuit in the interior temperature sensor input circuit.
- DTC B10C1 is set if there is a defective connector connection, or if there is an open circuit in the harness.
Current trouble
- The A/C-ECU, the interior temperature sensor, or connector(s) or wiring between the two may be defective.
Past trouble
- If DTC B10C0 or B10C1 is stored as a past trouble, carry out diagnosis with particular emphasis on wiring and connector(s) between the A/C-ECU and the interior temperature sensor. If the connectors and wiring are normal, and obviously the ECU is the cause of the trouble, replace the ECU. If in doubt, do not replace the ECU.
TROUBLESHOOTING HINT
- Malfunction of connector.
- Malfunction of the harness.
- Malfunction of the interior temperature sensor.
- Malfunction of the A/C-ECU.
DIAGNOSIS
Required Special Tool
- MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: M.U.T.-III USB Cable MB991910: M.U.T.-III Main Harness A
Scheme 94
- 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. Use scan tool MB991958 to diagnose the CAN bus lines. Connect scan tool MB991958. Refer to " «HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)»(/mitsubishi/lancer-evolution/x-2007-2016/remont/automatic-hvac-system/#automatic-air-conditioning-except-lancer-evolution__how-to-connect-the-scan-tool) ." Turn the ignition switch to "ON" position. Diagnose the CAN bus line. Q: Is the check result satisfactory? YES: Go to Step 2. NO: Repair the CAN bus lines. Repair the CAN bus lines (Refer to «CAN BUS DIAGNOSTIC TABLE»(/mitsubishi/lancer-evolution/x-2007-2016/remont/communication-devices/#controller-area-network-can-except-lancer-evolution__can-bus-diagnostics-table) ).
- STEP 2. Recheck for diagnostic trouble code. Recheck if the DTC is set. Erase the DTC. Turn the ignition switch to "ON" position. Check if the DTC is set. Q: Is the check result satisfactory? YES: It can be assumed that this malfunction is intermittent. Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/x-2007-2016/remont/hoistjack/#general-information-except-lancer-evolution__how-to-cope-with-intermittent-malfunctions) . NO: Go to Step 3.
- STEP 3. Check interior temperature sensor connector C-08 and A/C-ECU connector C-20 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are interior temperature sensor connector C-08 and A/C-ECU connector C-20 in good condition? YES: Go to Step 4. NO: Repair or replace the connector. Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/x-2007-2016/remont/body-electrical/#general-electrical-except-lancer-evolution) .
- STEP 4. Check the wiring harness between A/C-ECU connector C-20 (terminals 17 and 19) and interior temperature sensor connector C-08 (terminals 2 and 1). Check the sensor signal line and ground line for open and short circuit. Q: Is the wiring harness between A/C-ECU connector C-20 (terminals 17 and 19) and interior temperature sensor connector C-08 (terminals 2 and 1) in good condition? YES: Go to Step 5. NO: Repair the wiring harness.
- STEP 5. Check the interior temperature sensor. Measure the resistance between connector terminals 1 and 2 under at least two different temperatures. The resistance values should generally match those in the graph. NOTE: The temperature at the check should not exceed the range in the graph. Q: Is the interior temperature sensor in good condition? YES: Replace the A/C-ECU. Then go to Step 6. NO: Replace the interior temperature sensor. Then go to Step 6.
- STEP 6. Recheck for diagnostic trouble code. Check again if the 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 check result satisfactory? YES: The procedure is complete. NO: Return to Step 1 .
DATA LIST REFERENCE TABLE
| Scan tool display | Item No. | Inspection status | The display contents under normal conditions |
|---|---|---|---|
| Engine speed | 17 | Displays correct engine speed. | |
| Ambient temperature sensor | 19 | Ambient temperature is the same as scan tool displayed temperature | |
| Air thermo sensor | 20 | Evaporator outlet temperature is the same as scan tool displayed temperature. | |
| Interior temperature sensor | 21 | Interior temperature is the same as scan tool displayed temperature | |
| Temperature setting | 23 | Displays air conditioning set temperature. | |
| ETC sensor | 24 | Engine coolant temperature is the same as scan tool displayed temperature. | |
| Vehicle speed | 26 | Displays vehicle speed. | |
| A/C Compressor drive request | 27 | Compressor ON | ON |
| Compressor OFF | OFF | ||
| Air conditioning switch | 28 | Air conditioning switch ON | ON |
| Air conditioning switch OFF | OFF | ||
| Refrigerant leak | 29 | Normal | |
| Idle up request | 34 | Displays idle-up request signal. | |
| Rear heater SW light (1) | 35 | ||
| PTC heater 1 (1) | 36 | ||
| PTC heater 2 (1) | 37 | ||
| PTC heater 3 (1) | 38 | ||
| In/out select damp poten (target) | 45 | Displays outside/inside air selection damper target position. | |
| In/out select damp potentiometer | 46 | Displays outside/inside air selection damper position. | |
| Air outlet c/o potentiometer | 55 | Displays air outlet changeover damper position. | |
| Air outlet c/o potentio. (Target) | 56 | Displays air outlet changeover damper target position. | |
| Low pressure judgment | 57 | Normal | |
| Rear defogger switch | 60 | Rear window defogger switch ON | ON |
| Rear window defogger switch OFF | OFF | ||
| Pressure sensor | 61 | Displays refrigerant pressure. | |
| Air mix potentiometer | 63 | Displays the air mix damper position. | |
| Photo sensor (1) | 67 | ||
| Front blower fan | 68 | Displays blower motor condition. | |
| Front blower fan (Target) | 69 | Displays blower motor target value. | |
| Refrigerant pressure | 73 | Displays refrigerant pressure status. | |
| Condenser fan | 74 | Displays condenser fan running condition. | |
| Temp. set dial position | 76 | Displays the set temperature output value on the control panel. | |
| A/C Panel type | 77 | Dial/Auto/RHD | |
| Fan set dial position | 78 | Displays the air volume output value on the control panel. | |
| Air outlet c/o set dial position | 79 | Displays output value to the air outlet changeover dial on the control panel. | |
| Fan set dial operation flag | 80 | ON when the air volume adjusting dial is operated | |
| A/C SW operation flag | 81 | ON when the air conditioning switch is operated | |
| Temp. set dial operation flag | 82 | ON when the air conditioning switch is operated | |
| Defogger flag | 83 | ON when the air outlet changeover dial is set to the DEF position. | |
| In/out air c/o SW operation flag | 84 | ON when the inside air/outside air changeover switch is operated | |
| Rear defogger SW operation flag | 87 | ON when the rear window switch is operated | |
| Rear defogger SW light | 88 | Displays rear window switch indicator status. | |
| A/C SW light | 89 | Displays air conditioning switch indicator status. | |
| In/out air c/o SW light | 90 | Displays the status of the inside air/outside air changeover switch indicator. | |
| A/C Compressor drive flag | 91 | ON when the compressor is activated. | |
| Wiper operation flag | 92 | ON when the wiper is operated. | |
| Ignition position information | 93 | Ignition switch position status | |
| Power source voltage | 94 | Displays power supply voltage. | |
| IOD fuse equipment flag | 95 | IOD fuse status | |
| A/T lock up open request | 96 | ||
| System operation time | 100 | ||
| Compressor use times | 101 | ||
| Rear defogger use times | 102 | ||
| In/out air c/o poten drive time | 103 | ||
| Air outlet c/o poten drive time | 104 | ||
| Air mix potentiometer drive time | 105 | ||
| Hot state time (Interior TEMP.) | 106 | ||
| Cold state time (Interior TEMP.) | 107 | ||
| Hot state time (Ambient TEMP.) | 108 | ||
| Cold state time (Ambient TEMP.) | 109 | ||
| Maximum ambient temperature | 110 | ||
| Minimum ambient temperature | 111 | ||
| Maximum Engine coolant TEMP. | 112 | ||
| Engine high speed time | 113 | ||
| Maximum Engine speed | 114 | ||
| High pressure drive time | 115 | ||
| High pressure cut times | 116 | ||
| Maximum pressure (kPa) | 117 | ||
| A/C use rate | 118 | ||
| Compressor operation rate | 119 | ||
| Eco operation rate | 120 | ||
| Recirc use rate | 121 | ||
| A/C operation times | 122 | ||
| In/out air c/o operation times | 123 | ||
| Mode dial operation times | 124 | ||
| Blower fan dial operation times | 125 | ||
| TEMP. set dial operation times | 126 | ||
| FACE mode use rate | 127 | ||
| B/L mode use rate | 128 | ||
| FOOT mode use rate | 129 | ||
| D/F mode use rate | 130 | ||
| DEF mode use rate | 131 | ||
| Fan OFF use rate | 132 | ||
| Fan 1-2 step use rate | 133 | ||
| Fan 3-4 step use rate | 134 | ||
| Fan 5-6 step use rate | 135 | ||
| Fan 7-8 step use rate | 136 | ||
| Temp 1-7 step use rate | 137 | ||
| Temp 8-10 step use rate | 138 | ||
| Temp 11-13 step use rate | 139 | ||
| Temp 17-19 step use rate | 140 | ||
| Temp 20-22 step use rate | 141 | ||
| Temp 23-29 step use rate | 142 | ||
| PTC heater1 use times (1) | 143 | ||
| PTC heater2 use times (1) | 144 | ||
| PTC heater3 use times (1) | 145 | ||
| Fan LO driving time | 146 | ||
| Fan M1 driving time | 147 | ||
| Fan M2 driving time | 148 | ||
| Fan HI driving time | 149 | ||
| Rear PTC heater counter (1) | 150 | ||
| (1) shows that it is displayed but not used. | |||
| (1) | Shows that it is displayed but not used. |
DATA LIST REFERENCE TABLE
ACTUATOR TEST
| Item No. | Check items | Driven content |
|---|---|---|
| 2 | Idle up request | Idle-up request signal |
| 5 | In/out selection damper | The moving position of outside/inside air selection damper motor |
| 6 | Air mix damper motor | The moving position of air mix damper motor |
| 7 | Front blower fan | The amount of blower motor rotation |
| 8 | Air outlet c/o damper | Air outlet changeover damper motor moving position |
| 10 | Condenser fan | The amount of condenser fan rotation |
| 11 | Air conditioning | A/C switch selection position |
| 12 | Rear defogger switch | Rear window defogger switch selection position |
| 13 | A/T lock open request |
ACTUATOR TEST REFERENCE TABLE
Scheme 95
| Terminal No. | Check items | Check conditions | Normal conditions |
|---|---|---|---|
| 1 | Power transistor (DRAIN) | Air volume control dial: Maximum air volume | 0 to 2 V |
| 2 | Power transistor (GATE) | Air volume control dial: Maximum air volume | Battery voltage |
| 3 - 8 | |||
| 9 | A/C control panel (input) | ||
| 10 - 12 | |||
| 13 | Battery power supply | Always | Battery voltage |
| 14 | Ground | Always | 1 V or less |
| 15 | IG1 power supply | Ignition switch: IG1 | Battery voltage |
| 16 | A/C pressure sensor input | Refer to SIMPLE INSPECTION OF THE A/C PRESSURE SENSOR . | Refer to SIMPLE INSPECTION OF THE A/C PRESSURE SENSOR . |
| 17 | Interior temperature sensor | Sensor probe temperature: 25°C (77°F) (4.0 kohms) | 2.1 to 2.7 V |
| 18 | |||
| 19 | Sensor ground | Always | 1 V or less |
| 20 | A/C pressure sensor power supply | Ignition switch: IG2 | 5 V |
| 21 | Fin thermo sensor ground | Always | 1 V or less |
| 22 | Fin thermo sensor | Sensor probe temperature: 25°C (77°F) (4.0 kohms) | 2.1 to 2.7 V |
| 23 | |||
| 24 | Motor for air outside/inside air circulation switching damper | ||
| 25 | Motor for air outside/inside air circulation switching damper | ||
| 26 | Motor for air outside/inside air circulation switching damper | ||
| 27 | Motor for air outside/inside air circulation switching damper | ||
| 28 | Air mix damper motor | ||
| 29 | Motor power supply | ||
| 30 | Air outlet changeover damper motor | ||
| 31 | Air outlet changeover damper motor | ||
| 32 | Air outlet changeover damper motor | ||
| 33 | Air outlet changeover damper motor | ||
| 34 | Air mix damper motor | ||
| 35 | Air mix damper motor | ||
| 36 | Air mix damper motor |
A/C-ECU CONNECTOR TERMINALS IDENTIFICATION TABLE
SPECIAL TOOLS
SPECIAL TOOLS Tool Tool number and name Supersession Application MB991958 MB991824 MB991827 MB991910 MB991911 MB991914 MB991825 MB991826 M.U.T.-III sub-assembly Vehicle communication interface (V.C.I.) M.U.T.-III USB cable M.U.T.-III main harness A (Vehicles with CAN communication system) M.U.T.-III main harness B (Vehicles without CAN communication system) M.U.T.-III main harness C (for Chrysler models only) M.U.T.-III measurement adapter M.U.T.-III trigger harness MB991824-KIT NOTE: G: MB991826 M.U.T.-III Trigger Harness is not necessary when pushing V.C.I. ENTER key. CAUTION: M.U.T.-III main harness A (MB991910) should be used. M.U.T.-III main harness B and C should not be used for this vehicle. DTC, data list and actuator test check. MB991223 MB991219 MB991220 MB991221 MB991222 Harness set Check harness LED harness LED harness adapter Probe General service tool (jumper) Continuity check and voltage measurement at harness wire or connector For checking connector pin contact pressure For checking power supply circuit For checking power supply circuit For connecting a locally sourced tester MB992006 Extra fine probe - Continuity check and voltage measurement at harness wire or connector
Scheme 96
Scheme 97
Scheme 98
Scheme 99
INTERIOR TEMPERATURE SENSOR CHECK
When the resistance between the sensor terminals is measured under two or more temperature conditions, the resistance should approximately satisfy the illustrated values.
Note. The temperature conditions when checking should not exceed the range shown in the diagram.
OTHER PARTS MAINTENANCE SERVICE POINTS
The following maintenance service points are the same as for the manual A/C.
| Item | Reference | |
|---|---|---|
| On-vehicle service | Refrigerant level test | REFRIGERANT LEVEL TEST |
| Air conditioning compressor clutch test | A/C COMPRESSOR CLUTCH TEST | |
| Simple inspection of the a/c pressure sensor | SIMPLE INSPECTION OF THE A/C PRESSURE SENSOR | |
| Compressor drive belt adjustment | COMPRESSOR DRIVE BELT ADJUSTMENT | |
| Charging, discharging | CHARGING | |
| Performance test | PERFORMANCE TEST | |
| Refrigerant leak repair | REFRIGERANT LEAK REPAIR PROCEDURE | |
| Compressor noise check | COMPRESSOR NOISE CHECK | |
| Power relay continuity check | POWER RELAY CHECK | |
| Idle-up operation check | IDLE-UP OPERATION CHECK | |
| Heater control unit | HEATER CONTROL UNIT | |
| Heater unit and blower assembly | HEATER UNIT AND BLOWER ASSEMBLY | |
| Motors and transistor | MOTORS AND TRANSISTOR | |
| Ambient air temperature sensor | AMBIENT AIR TEMPERATURE SENSOR | |
| A/C-ECU | A/C-ECU | |
| Compressor and tension pulley | COMPRESSOR ASSEMBLY | |
| Condenser | CONDENSER ASSEMBLY | |
| Refrigerant line | REFRIGERANT LINE | |
| Ducts | DUCTS | |
| Rear ventilation duct | VENTILATORS | |
PARTS MAINTENANCE REFERENCE
See also:
• HOW TO COPE WITH INTERMITTENT MALFUNCTION
• DIAGNOSTIC TROUBLE CODE CHART
• CAN BUS DIAGNOSTIC TABLE
• HARNESS CONNECTOR INSPECTION
• SIMPLE INSPECTION OF THE A/C PRESSURE SENSOR
• REFRIGERANT LEVEL TEST
• A/C COMPRESSOR CLUTCH TEST
• COMPRESSOR DRIVE BELT ADJUSTMENT
• CHARGING
• PERFORMANCE TEST
• REFRIGERANT LEAK REPAIR PROCEDURE
• COMPRESSOR NOISE CHECK
• IDLE-UP OPERATION CHECK
• A/C COMPRESSOR CLUTCH RELAY ON CONDITIONS REFERENCE
• HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)