DTC B1143-13: IG2 Power Supply Control Circuit 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 |
IG2 power supply control circuit malfunction |
| Detection condition |
- The front body control module (FBCM) detects an open circuit in the start stop unit circuit for 2 s or more
with the ignition switched ON (engine off or on).
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| Fail-safe |
- |
| Possible cause |
- Start stop unit connector or terminal malfunction
- Start stop unit malfunction
- Front body control module (FBCM) connector or terminal malfunction
- Open circuit in the wiring harness between start stop unit terminal 2D and front body control module (FBCM) terminal 2U
- Front body control module (FBCM) malfunction
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