DTC C0040:29 [Advanced Keyless Entry And Push Button Start System]: L5

DETECTION CONDITION AND POSSIBLE CAUSE

DETECTION CONDITION	Brake switch and brake switch 2 link malfunction
POSSIBLE CAUSE	Connector or terminal malfunction Short to ground in wiring harness between brake switch terminal A and keyless control module terminal 3E Short to ground in wiring harness between brake switch terminal B and battery positive terminal Short to power supply in wiring harness between brake switch terminal D and keyless control module terminal 3S Open circuit in wiring harness between brake switch terminal A and keyless control module terminal 3E Open circuit in wiring harness between brake switch terminal B and battery positive terminal Open circuit in wiring harness between brake switch terminal C and body ground Open circuit in wiring harness between brake switch terminal D and keyless control module terminal 3S Brake switch malfunction Keyless control module malfunction
Courtesy of MAZDA MOTORS CORP.