Code Definition

B15C5 — Emergency (SOS) Switch Error

System: Body  |  Type: Manufacturer-Specific  |  Make: Toyota

About B15C5

B15C5 is a manufacturer-specific body diagnostic trouble code recorded for Toyota vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B15C5 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Data Communication Module (DCM, also called the telematics ECU) monitors the emergency call (SOS) switch input circuit located in the overhead roof console. DTC B15C5 is stored when, with the ignition on, the DCM detects an abnormal switch signal condition such as short to battery, short to ground, open circuit, or a stuck active state for a calibrated period of time. The SOS switch is a pushbutton designed to initiate an emergency call to a telematics call centre that contacts emergency services on behalf of the vehicle occupants. The DCM may also set this code if redundant switch inputs ...

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