Mitsubishi Outlander: Diagnostic Function

WARNING INDICATOR

When any malfunction occurs in the items related to the CVT system, which are described below, the symbol (A) continues being displayed in the information screen in the multi information display.

Check if the diagnostic trouble code is set when the symbol (A) continues being displayed in the information screen in the multi information display.

NOTE: When the symbol (B) is displayed in the information screen in the multi information display, the transmission fluid temperature is high. (Symbol (B) is turned on when the fluid temperature is approximately 140ºC (284ºF) or higher and turned off automatically when the fluid temperature drops below approximately 137ºC (279ºF).)

ON-BOARD DIAGNOSTICS

The transaxle control module (TCM) monitors its input/output signals (some signals all the time and others under specified conditions). When an irregular signal is initially monitored, the TCM decides that a malfunction has occurred and records the occurrence as a diagnostic trouble code. There are 33 diagnostic items. The diagnostic results can be read with scan tool. Diagnostic trouble codes are kept in memory by direct battery feed. The codes are retained in memory even if the ignition switch is in the "LOCK" (OFF) position. DTCs are not erased even after the battery terminals and the TCM connector are disconnected. In addition, the diagnostic trouble code can also be erased by scan tool.

NOTE: If a sensor is disconnected when the ignition switch is in the "ON" position, a diagnostic trouble code is stored in memory. In this case, erase the DTC using scan tool.

The 33 diagnostic items are displayed in numeric order.

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

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.

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 special tool MB991824 is energized, special tool MB991824 indicator light will be illuminated in a green color.

7. Start the M.U.T.-III system on the personal computer.

NOTE: Disconnecting scan tool MB991958 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: 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.

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

1. Connect scan tool MB991958 to the data link connector.

2. Turn the ignition switch to the "ON" position.

3. Select "System select" from the start-up screen.

4. Select "From 06 MY".

5. Make sure vehicle information is correct.

6. Select "AT/CVT/A-MT/TC-SST" to read the DTC.

7. Select "Diagnostic Trouble Code".

8. If a DTC is set, it is shown.

9. 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: 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.

1. Connect scan tool MB991958 to the data link connector.

2. Turn the ignition switch to the "ON" position.

3. Select "System select" from the start-up screen.

4. Select "From 06 MY".

5. Make sure vehicle information is correct.

6. Select "AT/CVT/A-MT/TC-SST".

7. Select "Data List".

8. Choose an appropriate item and select the "OK" button.

HOW TO DIAGNOSE THE CAN BUS LINES

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: 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.

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 the "view vehicle information" button.

6. Enter the vehicle information and select the "OK" button.

7. When the vehicle information is displayed, confirm again 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.

8. Select the "OK" button.

9. When the optional equipment screen is displayed, choose the one which the vehicle is fitted with, and then select the "OK" button.

HOW TO INITIALIZE CVT LEARNED VALUE

PURPOSE

After the CVT assembly, engine assembly, and valve body assembly are replaced, their learned value must be initialized. The initialization procedure is as below.

INITIALIZATION PROCEDURE

1. Move the selector lever to the "P" range and turn the ignition switch to the "LOCK" (OFF) position.

Then, connect scan tool to the data link connector.

2. Turn the ignition switch to the "ON" position, and then move the selector lever to the "R" range.

3. Depress the accelerator pedal while depressing the brake pedal. (Engine is not running.) Using the M.U.T.-III, execute the clear DTC function for the CVT-ECU (even if no code is set).

NOTE: Performing initialization of the learned value will also erase the diagnostic trouble code.

LEARNING PROCEDURE FOR CVT HYDRAULIC CONTROL

PURPOSE

After initialization, the TCM does not have any learned value. This may degrade the shifting operation quality. The learning procedure is described below.

LEARNING PROCEDURES

FAIL-SAFE FUNCTION/BACKUP FUNCTION

If abnormality occurs in signals from various sensors, switches, or solenoids, this function allows controlling them with the minimum adverse effect to the driving performance. The following shows the fail-safe controls when an abnormal signal is input to TCM from each sensor.

ROAD TEST

TORQUE CONVERTER STALL TEST

This test measures the maximum engine speed at the time the torque converter stalls with the selector lever in the "D" or "R" position. With this test, the holding abilities of the clutch and brake that are incorporated in the transaxle can be checked.

WARNING For safety, operators must not stand in front of and at the rear of the vehicle during this test.

1. Check the transmission fluid level, transmission fluid temperature, and engine coolant temperature.

• Transmission fluid level: In the "HOT" mark on the dipstick
• Transmission fluid temperature: 70 − 80ºC (158 − 176ºF)
• Engine coolant temperature: 80 − 100ºC (176 − 212ºF)

NOTE: Use scan tool MB991958 to measure the transmission fluid temperature.

2. Raise the vehicle.

3. Pull the parking brake lever, and then fully depress the brake pedal.

4. Start the engine.

CAUTION

• Do not maintain the WOT condition for 5 seconds or longer.
• When continuing the stall test, make sure that the fluid temperature does not exceed 80ºC (176ºF). If the transmission fluid temperature exceeds 80ºC (176ºF), run the engine at around 1,000 r/min for 1 minute or longer to lower the transmission fluid temperature to 80ºC (176ºF) or less.

5. Move the selector lever to the "D" range and fully depress the accelerator pedal. Quickly read the maximum engine speed at this time.

Standard value − Stall speed: 2,400 − 2,900 r/min

6. Move the selector lever to the "R" range, and then repeat the previous step.

Standard value − Stall speed: 2,400 − 2,900 r/min

JUDGMENT OF TORQUE CONVERTER STALL TEST RESULTS

1. Stall speed is high when selector lever is in both "D" and "R" ranges.

• Malfunction of the torque converter (Torque converter and input shaft spline are slipping)
• Malfunction of the valve body
• Damaged wiring harness and connectors
• Malfunction of TCM

2. Stall speed is high only when selector lever is in the "D" range.

• Forward clutch is slipping

3. Stall speed is high only when the selector lever is in the "R" range.

• Reverse brake is slipping

4. Stall speed is low when selector lever is in both "D" and "R" ranges.

• Malfunction of the torque converter
• Line pressure is low
• Low engine power

HYDRAULIC PRESSURE TEST

CAUTION The transmission fluid temperature should be between 70 − 80ºC (158 − 176ºF) during the test.

1. Check the transmission fluid level and temperature. Check engine coolant temperature.

• Transmission fluid level: "HOT" mark on the dipstick
• Transmission fluid temperature: 70 − 80ºC (158 − 176ºF)
• Engine coolant temperature: 80 − 100ºC (176 − 212ºF)

2. Raise the vehicle so that the wheels are free to turn.

3. Connect the special tools (3.0 MPa (427 psi) oil pressure gauge [MD998330] and joint [MD998331, MB992127] ) to each pressure discharge port.

NOTE:
DR: Torque converter output pressure port
PRI: Primary pressure port
PL: Line pressure port
FWD: Forward clutch pressure port
REV: Reverse brake pressure port

4. Restart the engine.

5. Check that there are no leaks around the special tool port adapters.

WARNING For safety, operators must not stand in front of and at the rear of the vehicle during this test.

6. Measure the hydraulic pressure at each port under the conditions given in the standard hydraulic pressure table, and check that the measured values are within the standard value ranges.

7. If the pressure is not within the standard value, stop the engine and refer to the hydraulic pressure test diagnosis table.

8. Remove the O-ring from the port plug and replace it.

9. Remove the special tool, and install the plugs to the hydraulic pressure ports.

10.Start the engine and check that there are no leaks around the plugs.

Standard hydraulic pressure table

Hydraulic pressure test diagnosis table

Seal ring location

DIAGNOSTIC TROUBLE CODE CHART

CAUTION During diagnosis, a diagnostic trouble code associated with other system may be set when the ignition switch is turned on with connector(s) disconnected. On completion, confirm all systems for diagnostic trouble code(s). If diagnostic trouble code(s) are set, erase them all.

TROUBLE SYMPTOM CHART

CAUTION During diagnosis, a diagnostic trouble code associated with other system may be set when the ignition switch is turned on with connector(s) disconnected. On completion, confirm all systems for diagnostic trouble code(s). If diagnostic trouble code(s) are set, erase them all.

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