DTC C1128-0A: Electric Parking Brake Switch Indicator Light [DSC HU/Cm]: Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

System malfunction location	Electric parking brake switch indicator light
Detection condition	The DSC HU/CM detects an excessive temperature increase in the drive circuit of the electric parking brake switch indicator light.
Fail-safe	Refer to "DTC Table" and "Fail-safe Function Malfunction Contents Table". (See DTC TABLE [DSC HU/CM (US)] .)
Possible cause	Electric parking brake switch connector or terminal malfunction Electric parking brake switch malfunction Electric parking brake switch indicator light malfunction DSC HU/CM connector or terminals malfunction Short to power supply in electric parking brake switch indicator light signal circuit DSC HU/CM malfunction
Courtesy of MAZDA MOTORS CORP.