DTC C0089-64: TCS Off Switch [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	TCS OFF switch
Detection condition	The DSC HU/CM detects that the TCS OFF switch is stuck on (on for continuous 10 s or more).
Fail-safe	Refer to "DTC Table" and "Fail-safe Function Malfunction Contents Table". (See DTC TABLE [DSC HU/CM (US)] .)
Possible cause	The driver pressed and held the TCS OFF switch for 10 s or more. Short to ground in TCS OFF switch (cluster switch No. 1) LIN communication line Cluster switch No. 1 malfunction TCS OFF switch malfunction Instrument cluster malfunction Body control module (BCM) malfunction DSC HU/CM malfunction
Courtesy of MAZDA MOTORS CORP.