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DTC Detection Logic

DTC DETECTION LOGIC REFERENCE

DTC Item (CONSULT-III screen terms) Diagnostic item is detected when... Possible cause
P1721(1) VEH SPD SE/CIR-MTR
  • Signal (CAN communication) from vehicle speed sensor MTR not input due to cut line or the like.
  • Unexpected signal input during running.
 Harness or connectors
(Sensor circuit is open or shorted.)
(1) This is not an OBD-II self-diagnostic item.
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