Lancer Sportback L4-2.4L (4B12) (2010)
4. Diagnose CAN bus lines, and check if the scan tool MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as shown in the figure.
Q: Does scan tool MB991958 screen correspond to the illustration?
YES : Repair the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31.
NO : Check KOS-ECU connector C-31, and repair if necessary. If the KOS-ECU connector is in good condition, replace the KOS-ECU.
STEP 50. Using scan tool MB991958, diagnose the CAN bus line. (checking the WCM for internal failure)
CAUTION:
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Strictly observe the specified wiring harness repair procedure.
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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. Disconnect WCM connector C-09.
2. Connect scan tool MB991958 to the data link connector.
3. Turn the ignition switch to the "ON" position.