DTC B13C3: 29 Communication Error With LF Control Unit: Notes
DTC B13C3:29 (ADVANCED KEYLESS ENTRY SYSTEM) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Communication error with LF control unit |
| Detection condition |
- The start stop unit detects communication error with LF control unit 10 times in a series.
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| Fail-safe |
- Inhibits the door lock/unlock control using the advanced keyless entry system.
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| 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 (24-pin type)/M (28-pin type)
- Open circuit in wiring harness between start stop unit terminal 2F and LF control unit terminal I (24-pin type)/M (28-pin type)
- LF control unit malfunction
- Start stop unit malfunction
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 Courtesy of MAZDA MOTORS CORP.
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