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Home >> Mitsubishi >> 2014 >> Lancer SE >> Repair and Diagnosis >> External Pages >> Different car >> Section 95 (Theft Alarm - With Diagnostics) >> Diagnosis >> DIAGNOSTIC TROUBLE CODE PROCEDURES < Vehicles with theft-alarm sensor > >> DTC B120B: Theft alarm sensor error >> Diagnostic Function

Diagnostic Function

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

The theft-alarm sensor communicates with the ETACS-ECU via the LIN bus line. If the DTC No. B120B is stored, the theft-alarm sensor itself may be defective.

NOTE:
  • DTC No. B120B may be stored when the theft-alarm sensor cover is improperly installed or is removed. Check if the theft-alarm sensor cover is properly installed.
  • DTC No. B120B is stored when the ultrasonic wave transmission/reception part of the theft-alarm sensor is covered. Check if the ultrasonic wave transmission/reception part of the theft-alarm sensor was covered.
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