Automatic Air Conditioning: Component Locations Mitsubishi Galant IX

Required Special Tools

1. MB991958: Scan Tool (MUT-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A (Vehicles with CAN communication system)

1. Ensure that the ignition switch is at the "LOCK" (OFF) position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824 and the personal computer.
4. Connect special tool MB991910 to special tool MB991824
5. Connect special tool MB991910 to the data link connector.
6. 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.
7. Start the MUT-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.

Scheme 15

1. MB991958: Scan Tool (MUT-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A (Vehicles with CAN communication system)

Note. If the battery voltage is low, diagnostic trouble codes will not be output. Check the battery if scan tool MB991958 does not display.

Scheme 16

1. Connect the scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System Select."
5. Choose "AUTO A/C" from the "BODY" tab.
6. Select "MITSUBISHI."
7. Select "Diagnostic Trouble Code."
8. If a DTC is set, it is shown.
9. Choose "Erase DTC" to erase the DTC.

1. MB991958: Scan Tool (MUT-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A (Vehicles with CAN communication system)

Scheme 17

1. Connect the scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System Select."
5. Choose "AUTO A/C" from the "BODY" tab.
6. Select "MITSUBISHI."
7. Select "Data List."
8. Choose an appropriate item and select the "OK" button.

1. MB991958: Scan Tool (MUT-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A (Vehicles with CAN communication system)

Scheme 18

1. Connect the scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System Select."
5. Choose "AUTO A/C" from the "BODY" tab.
6. Select "MITSUBISHI."
7. Choose "Actuator Test" from "AUTO A/C" screen.
8. Choose an appropriate item and select the "OK" button.

1. MB991958: Scan Tool (MUT-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A

Scheme 19

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "CAN bus diagnosis" from the start-up screen.
4. 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.
5. Select "view vehicle information" button.
6. 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.
7. Press the "OK" button.
8. When the options are displayed, choose the options (mark the check) and then select "OK".

1. MB991958: Scan Tool (MUT-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A (Vehicles with CAN communication system)

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1. STEP 1. Check the defogger and outside/inside air selection damper control motor operation. Q: Do the defogger and outside/inside air selection damper control motor work normally? YES: Go to Step 2. NO: Refer to «SYMPTOM CHART < MIDDLE TYPE >»(ref-205492-S39229196022005111900000) .
2. STEP 2. Using scan tool MB991958, read diagnostic trouble code. 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. 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-205493-S02916364092005111900000) . NO: Go to Step 3.
3. STEP 3. Using scan tool MB991958, check data list item 06: Photo sensor. Connect scan tool MB991958 to the data link connector. Start the engine. Set scan tool MB991958 to the data reading mode for item 06: Photo sensor. Check that the display on the scan tool changes when the photo sensor is covered with hands. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the sensor within the specified range? YES: Go to Step 7 . NO: Go to Step 4.
4. STEP 4. Check A/C-ECU connectors C-15, C-16 and photo sensor connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector. Q: Are A/C-ECU connectors C-15, C-16 and photo sensor connector C-04 in good condition? YES: Go to Step 5. NO: Repair or replace the connector. Refer to «HARNESS CONNECTOR INSPECTION»(ref-215474-S16579441322006011200000) . Check that the air conditioning works normally.
5. STEP 5. Check the wiring harness between photo sensor connector C-04 (terminal 1, 2) and A/C-ECU connector C-15 (terminal 19), C-16 (terminal 25). Q: Is the wiring harness between photo sensor connector C-04 (terminal 1, 2) and A/C-ECU connector C-15 (terminal 19), C-16 (terminal 25) in good condition? YES: Go to Step 6. NO: Repair the wiring harness. Check that the air conditioning works normally.
6. STEP 6. Replace the photo sensor. Q: Does the A/C operate normally? YES: No action is necessary and testing is complete. NO: Replace the A/C-ECU. Check that the air conditioning works normally.
7. STEP 7. Check the refrigerant level. Use the refrigerant recovery station to remove all of the refrigerant, and then calculate the amount of the refrigerant and charge it. Q: Is the refrigerant level correct? YES: Refer to «SYMPTOM CHART < MIDDLE TYPE >»(ref-205492-S39229196022005111900000) . NO: Correct the refrigerant level (Refer to «REFRIGERANT LEVEL TEST»(ref-205492-S24554316772005111900000) ). Check that the air conditioning works normally.

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1. MB991958: Scan Tool (MUT-III Sub Assembly) MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A