DTC C0023-14: Brake Light 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 C0023:14 (BCM) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Brake light circuit malfunction |
| Detection condition |
- The electrical supply unit (ESU) detects an open circuit in the brake light circuit.
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| Fail-safe |
Not applicable |
| Possible cause |
- Rear combination light (LH) connector or terminal malfunction
- Open circuit in brake light (LH) ground circuit
- Rear combination light (RH) connector or terminal malfunction
- Open circuit in brake light (RH) ground circuit
- High-mount brake light connector or terminal malfunction
- Open circuit in high-mount brake light ground circuit
- Electrical supply unit (ESU) connector or terminal malfunction
- Open circuit in brake light signal circuit
- Open circuit in high-mount brake light signal circuit
- Brake light (LH) malfunction
- Brake light (RH) malfunction
- High-mount brake light malfunction
- Electrical supply unit (ESU) malfunction
- Body control module (BCM) malfunction
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 Courtesy of MAZDA MOTORS CORP.
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