| DTC |
C0023:62, C0040:64 |
Brake switch |
| DETECTION CONDITION |
- C0023:62
- Brake light ON signal is not input even though the brake light request signal is input.
- Brake light ON signal is input even though the brake light request signal is not input.
- Brake light ON signal is not input when the brake fluid pressure sensor signal reaches the specified value.
- Communication error with brake light is detected in CAN communication via RBCM.
- C0040:64
- Brake switch ON signal is input for 6 min or more when driving at a vehicle speed of 20 km/h {12 mph} or more.
- A brake switch ON signal is not input when the brake fluid pressure sensor signal reaches the specified value.
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| FAIL-SAFE FUNCTION |
Refer to "DTC Table" and "Fail-safe Function Malfunction Contents". (See DTC TABLE [DSC HU/Control Module] .) |
| POSSIBLE CAUSE |
- Open or short circuit in wiring harness between the brake switch and PCM terminal 2G (VIN Y)
- Open or short circuit in wiring harness between the brake switch and PCM terminal 2AB (VIN M)
- Brake switch malfunction
- PCM malfunction
- Rear body control module (RBCM) and/or brake light relay malfunction
- DSC HU/Control Module malfunction
- Poor connection at connectors (female terminal)
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 Courtesy of MAZDA MOTORS CORP.
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