DTC C0040-23: Brake Switch (No. 1 Signal) 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 |
Brake switch (No. 1 signal) circuit malfunction |
| Detection condition |
- With the ignition switched ON (engine off or on), the start stop unit detects that the brake switch No. 1 signal is in the off condition for 3 s or more
continuously for a continuous 5 times
even though brake switch No. 2 signal changes.
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| Fail-safe |
- Determined by brake switch No. 2 with the brake pedal depressed.
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| Possible cause |
- Brake switch connector or terminal malfunction
- Brake switch (No. 1 signal) malfunction
- Brake switch (No. 1 signal) power supply circuit malfunction
- Short to ground in wiring harness between STOP 10 A fuse and brake switch terminal A
- STOP 10 A fuse malfunction
- Open circuit in wiring harness between battery positive terminal and brake switch terminal A
- Start stop unit connector or terminal malfunction
- Short to ground in wiring harness between brake switch terminal D and start stop unit terminal 1C
- Open circuit in wiring harness between brake switch terminal D and start stop unit terminal 1C
- Start stop unit malfunction
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