Lancer Sportback L4-2.4L (4B12) (2010)
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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. See: Reading and Clearing Diagnostic Trouble Codes/How to Connect the Scan Tool
(M.U.T.-Iii.)
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line. See: Scan Tool Testing and Procedures/How to Diagnose the Can Bus Line
Q: Is the check result satisfactory?
YES : Go to Step 2.
NO : Repair the CAN bus lines (Refer to Diagnosis - Can Bus Diagnostic Chart.) See: Powertrain Management/Computers and Control
Systems/Information Bus/Testing and Inspection/Scan Tool Testing and Procedures/CAN Bus Diagnostics Table Then go to Step 6.
STEP 2. Using scan tool MB991958, check for CVT system DTC.
1. Connect scan tool MB991958 to the data link connector. See: Reading and Clearing Diagnostic Trouble Codes/How to Connect the Scan Tool
(M.U.T.-Iii.)
2. Turn the ignition switch to the "ON" position.
3. Check for CVT system DTC (Refer to Diagnosis - Diagnostic Function.) See: Transmission and Drivetrain/Continuously Variable
Transmission/Transaxle/Testing and Inspection/Initial Inspection and Diagnostic Overview
Q: Is any DTC set?
YES : Repair the CVT system (Refer to Diagnosis - Diagnostic Trouble Code Chart.) See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Diagnostic Trouble Code Descriptions/Continuously Variable Transaxle (CVT) Then go to Step 6.
NO : Go to Step 3.
STEP 3. Using scan tool MB991958, check for MFI system DTC.
1. Connect scan tool MB991958 to the data link connector. See: Reading and Clearing Diagnostic Trouble Codes/How to Connect the Scan Tool
(M.U.T.-Iii.)
2. Turn the ignition switch to the "ON" position.
3. Check for MFI system DTC (Refer to MFI Diagnosis - Diagnostic Function.) See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Function
Q: Is any DTC set?
YES : Repair the MFI system (Refer to MFI Diagnosis - Diagnostic Trouble Code Chart.) See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Diagnostic Trouble Code Descriptions Then go to Step 6.
