DTC B13C3-29; Communication Error Between Start Stop Unit And LF Control Unit: Notes

WARNING: This page is about a different car, the 2017 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

DTC B13C3-29; COMMUNICATION ERROR BETWEEN START STOP UNIT AND LF CONTROL UNIT - DETECTION CONDITION AND POSSIBLE CAUSES

Description	Communication error between start stop unit and LF control unit
Detection condition	Start stop unit detects the communication error with the LF control unit 10 times.
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 2F and LF control unit terminal I Open circuit in wiring harness between start stop unit terminal 2F and LF control unit terminal I LF control unit malfunction Start stop unit malfunction