Diagnostic Procedure

WARNING: This page is about a different car, the 2015 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

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

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.

Q: Is the check result normal?
1. YES: Go to Step 2.
2. NO: Repair the CAN bus lines. After repairing the CAN bus line, go to Step 2.
STEP 2. Check whether the DTC is stored again.
1. Erase the DTC.
2. Carry out the Item No. 3 (Teach-In): Line pressure Test. (Refer to (TEACH-IN REFERENCE TABLE ).)
3. With the engine idle status, check that the DTC is stored again.
Q: Is the DTC No. P0777 restored? or Is the line pressure test of Teach-In not completed normally ("No" is displayed in the Data list No. 101: Normal End)?
1. YES: Go to Step 3.
2. NO: Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
STEP 3. Check the fluid.
Q: Is the fluid level proper?
1. YES: Go to Step 4.
2. NO: Add the fluid.
STEP 4. Check the installation status of the mechatronic assembly.
Q: Is the mechatronic assembly installed correctly?
1. YES: Go to Step 5
2. NO: Install the mechatronic assembly correctly. (Refer to >> B << GASKET A/GASKET C/MECHATRONIC ASSEMBLY INSTALLATION .)
STEP 5. Check whether the DTC is stored again.
1. Erase the DTC.
2. With the engine idle status, check that the DTC is stored again.
Q: Is DTC No. P0777 stored?
1. YES: Replace the mechatronic assembly. (Refer to TRANSAXLE .) Then, go to Step 6.
2. NO: Install the mechatronic assembly correctly. (Refer to >> B << GASKET A/GASKET C/MECHATRONIC ASSEMBLY INSTALLATION .)
STEP 6. Check whether the DTC is stored again.
1. Erase the DTC.
2. With the engine idle status, check that the DTC is stored again.
Q: Is DTC No. P0777 stored?
1. YES: Replace the transaxle assembly. (Refer to << B >> TRANSAXLE ASSEMBLY CONNECTOR REMOVAL
2. NO: This diagnosis is complete.