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DTC Detection Logic

WARNING: This page is about a different car, the 2011 Suzuki Equator. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION LOGIC CHART

DTC SDT Diagnostic item is detected when... Reference
[P1820] ENGINE SPEED SIG
  • Malfunction is detected in engine speed signal that is output from ECM through CAN communication.
  • Improper signal is input while driving.
Diagnosis Procedure