DTC B13C3-09: LF Control Unit Malfunction: Notes
WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
| System malfunction location |
LF control unit malfunction |
| Detection condition |
- The start stop unit detects that the LF State signal of the LF control unit is low for 5 s or more
.
- With the communication between the start stop unit and LF control unit being performed normally, there is no response from the LF control unit even though there is a signal transmission request from the start stop unit to the LF control unit, and the LF state signal becomes low.
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| Fail-safe |
- Inhibits the door lock/unlock control using the advanced keyless entry system.
|
| Possible cause |
- LF control unit connector or terminal malfunction
- Start stop unit connector or terminal malfunction
- Short to ground in wiring harness between start stop unit terminal 2H and LF control unit terminal G
- Open circuit in wiring harness between start stop unit terminal 2H and LF control unit terminal G
- LF control unit malfunction
- Start stop unit malfunction
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