DTC B100B:15 [Advanced Keyless Entry And Push Button Start System]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION AND POSSIBLE CAUSE

DETECTION CONDITION	Steering lock unit ground circuit voltage higher than threshold is detected for 0.2 s
POSSIBLE CAUSE	Connector or terminal malfunction Short to power supply in wiring harness between steering lock unit terminal B and keyless control module terminal 1A Open circuit in wiring harness between steering lock unit terminal B and keyless control module terminal 1A Steering lock unit malfunction Keyless control module malfunction
Courtesy of MAZDA MOTORS CORP.