Lancer L4-2.4L (4B12) (2009)
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 A/C-ECU connector C-20 [vehicles with A/C] or heater control unit
connector C-48 [vehicles without A/C].
NO : Check A/C-ECU connector C-20 [vehicles with A/C] or heater control unit connector C-48 [vehicles without A/C], and repair if necessary. If
the A/C-ECU [vehicles with A/C] or heater control unit connector [vehicles without A/C] connector is in good condition, replace the A/C-ECU
[vehicles with A/C] or heater control unit [vehicles without A/C].
STEP 31. Using scan tool MB991958, diagnose the CAN bus line. (checking the radio and CD player 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 radio and CD player connector C-104.
2. Connect scan tool MB991958 to the data link connector.
3. Turn the ignition switch to the "ON" position.