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Diagnostic Trouble Codes

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Description
DTC 01  BRAKE SWITCH ON/OFF SIGNAL
DTC 04  DOOR SWITCH ON/OFF SIGNAL
DTC 05  DOOR LOCK-LINK SWITCH ON/OFF SIGNAL
DTC 07  REAR WINDOW DEFROSTER SWITCH ON/OFF SIGNAL
DTC 08  TNS RELAY ON/OFF SIGNAL
DTC 10  VEHICLE SPEED INPUT SIGNAL
DTC 11  ENGINE SPEED INPUT SIGNAL
DTC 12  OPERATION SIGNAL TO SPEEDOMETER
DTC 13  OPERATION SIGNAL TO TACHOMETER
DTC 14  OPERATION SIGNAL TO BUZZER
DTC 16  OPERATION SIGNAL TO FUEL-LEVEL WARNING LIGHT
DTC 17  OPERATION SIGNAL TO REAR WINDOW DEFROSTER INDICATOR LIGHT
DTC 18  IGNITION KEY ILLUMINATION ON/OFF SIGNAL
DTC 20  OPERATION SIGNAL TO REAR WINDOW DEFROSTER RELAY ON/OFF SIGNAL
DTC 22  FUEL LEVEL SIGNAL
DTC 23  OPERATION SIGNAL TO FUEL GAUGE
DTC 24  WATER TEMPERATURE SIGNAL
DTC 25  OPERATION SIGNAL TO WATER TEMPERATURE GAUGE
DTC 26  LCD INDICATION
DTC 27  OPERATION SIGNAL TO INTERIOR LIGHT
DTC 31  KEY REMINDER ON/OFF SIGNAL
DTC 41  P POSITION SWITCH ON/OFF SIGNAL
DTC 42  OPERATION SIGNAL TO INTERLOCK SOLENOID
Fig 1: DTC Chart & Related Items
G00991076Courtesy of MAZDA MOTORS CORP.
NOTE: Following list items reference Fig 1
  • The diagnostic trouble codes are displayed in numerical order. (While performing the inspection, if you want to inspect a diagnostic trouble code of which the number is smaller than the code number you are currently inspecting, terminate the check mode then repeat the inspection from the beginning.)
  • If the speed signal is put into the instrument cluster (the front wheels are rotated) while a code other than DTC 10 is displayed, the input/output check mode will be cancelled.
  • The diagnostic trouble codes can be fast-forwarded by pushing and holding the odometer/tripmeter switch for 1 second or more  .