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DTC C1109 64: DSC Off Switch: Notes

WARNING: This page is about a different car, the 2014 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DTC C1109 64 DETECTION CONDITIONS AND POSSIBLE CAUSES (DYNAMIC STABILITY CONTROL)

DTC  C1109:64  DSC OFF switch 
DETECTION CONDITION 
  • Continuous ON signal from the DSC OFF switch for 10 s or more  is detected.
FAIL-SAFE FUNCTION 
  • Permits the control and does not illuminate each warning/indicator light.
POSSIBLE CAUSE 
  • The driver pressed and held the DSC OFF switch for 10 s or more. 
  • Short to ground in the wiring harness between the instrument cluster terminal V and DSC OFF switch terminal B
  • Open circuit in wiring harness between instrument cluster terminal T and DSC OFF switch terminal C
  • DSC OFF switch malfunction
  • Poor connection at connectors (female terminal)
G09783045Courtesy of MAZDA MOTORS CORP.