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.

STEP 1. Using scan tool MB991958, diagnose the CAN bus lines.
Use scan tool MB991958 to perform the CAN bus diagnosis.

Q: Is the check result normal?
1. YES: Go to Step 2.
2. NO: Repair the CAN bus lines (Refer to DIAGNOSTIC TROUBLE CODE TABLE ).
STEP 2. Check other diagnostic trouble codes.
Q: Are other diagnostic trouble codes stored?
1. YES: Carry out the appropriate troubleshooting.
2. NO: Go to Step 3.
STEP 3. M.U.T.-III data list
Item 19: Secondary pressure (Refer to DATA LIST REFERENCE TABLE .)

Q: Is the check result normal?
1. YES: Intermittent malfunction
2. NO: Go to Step 4.
STEP 4. Line Pressure Check
Carry out "hydraulic test" (Refer to HYDRAULIC PRESSURE TEST ).

Q: Is the check result normal?
1. YES: Go to Step 5.
2. NO: Repair according to the hydraulic pressure test diagnosis table.
STEP 5. Symptom recheck after erasing diagnostic trouble code
Q: Is the check result normal?
1. YES: Intermittent malfunction
2. NO: Replace TCM.