DTC B11FD-1F: Keyless Antenna (Exterior, LF) Circuit Malfunction (BCM): Outline
WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
DTC B11FD:1F (BCM) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Keyless antenna (exterior, LF) circuit malfunction |
| Detection condition |
- The LF control unit detects an open circuit or short to ground in the keyless antenna (exterior, LF) circuit.
Preconditions
- The ignition switched off.
|
| Fail-safe |
- Inhibits the door lock/unlock control using the advanced keyless entry system.
|
| Possible cause |
- Front outer handle (LH) connector or terminal malfunction
- LF control unit connector or terminal malfunction
- Short to ground in keyless antenna (exterior, LF) signal circuit
- Open circuit in keyless antenna (exterior, LF) signal circuit
- LF control unit malfunction
- Keyless antenna (exterior, LF) malfunction
- Body control module (BCM) malfunction
|
 Courtesy of MAZDA MOTORS CORP.
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