DTC B1109-11: Door Lock Switch (Passenger's Side) 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 B1109:11 (BCM) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Door lock switch (passenger's side) circuit malfunction |
| Detection condition |
- The door-electrical supply unit (passenger's side) detects that the door lock switch (passenger's side) is stuck lock/unlock.
Preconditions
- The door lock switch (passenger's side) is off.
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| Fail-safe |
Not applicable |
| Possible cause |
- Door lock switch (passenger's side) connector or terminal malfunction
- Door lock switch (passenger's side) malfunction
- Door-electrical supply unit (passenger's side) connector or terminal malfunction
- Short to ground in door lock switch (passenger's side) signal circuit (upstream)
- Door-electrical supply unit (passenger's side) malfunction
- Body control module (BCM) malfunction
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 Courtesy of MAZDA MOTORS CORP.
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