DTC C0023-14; Brake Light Circuit Malfunction: Notes
WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSE
| Description |
Brake light circuit malfunction |
| Detection condition |
- Rear body control module (RBCM) detects any of the following conditions:
- Brake lights/high-mount brake light illuminated even though driver or system does not illuminate brake lights/high-mount brake lights.
- Brake lights/high-mount brake light not illuminated even though driver depresses brake pedal.
- Brake lights/high-mount brake light not illuminated even though system illuminates brake lights/high-mount brake light.
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| Fail-safe function |
Not applicable |
| Possible cause |
- Brake light bulb (LH) malfunction
- Brake light bulb (RH) malfunction
- High-mount brake light connector or terminal malfunction
- Brake light (LH) connector or terminal malfunction
- Brake light (RH) connector or terminal malfunction
- Rear body control module (RBCM) connector or terminal malfunction
- Short to ground in wiring harness between the following terminals:
- Rear body control module (RBCM) terminal 4D-Brake light (LH) terminal C
- Rear body control module (RBCM) terminal 4D-Brake light (RH) terminal C
- Rear body control module (RBCM) terminal 4D-High-mount brake light terminal B
- Short to power supply in wiring harness between the following terminals:
- Rear body control module (RBCM) terminal 4D-Brake light (LH) terminal C
- Rear body control module (RBCM) terminal 4D-Brake light (RH) terminal C
- Rear body control module (RBCM) terminal 4D-High-mount brake light terminal B
- Open circuit in wiring harness between the following terminals:
- Rear body control module (RBCM) terminal 4D-Brake light (LH) terminal C
- Rear body control module (RBCM) terminal 4D-Brake light (RH) terminal C
- Rear body control module (RBCM) terminal 4D-High-mount brake light terminal B
- High-mount brake light malfunction
- Brake light (LH) malfunction
- Brake light (RH) malfunction
- Rear body control module (RBCM) malfunction
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