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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis >> Transmission >> Automatic Trans >> On-Board Diagnostic [Automatic Transaxle F5SA-El] >> DTC P0720:00 >> Notes

DTC P0720:00: Notes

DTC P0720:00 VSS circuit malfunction
DETECTION CONDITION 
  • Under the following conditions, VSS signal is not input for 5 s
    • Engine coolant temperature is 60 °C {140 °F} or more.
    • Selector lever position is D or M position
    • Secondary gear rotation speed is 1,500 rpm or more

    Diagnostic support note 

  • The check engine light illuminates if the TCM detects the above malfunction condition during the first drive cycle.
  • The automatic transaxle warning light illuminates if the TCM detects the above malfunction condition during the first drive cycle.
  • PENDING CODE is available.
  • FREEZE FRAME DATA is available.
  • The DTC is stored in the TCM memory.
FAIL-SAFE FUNCTION 
  • Inhibits 5GR
  • Maximizes line pressure
  • Inhibits feedback control
POSSIBLE CAUSE 
  • VSS connector or terminal malfunction
  • Open circuit in wiring harness between VSS terminal A and AT main relay terminal C
  • Short to GND in wiring harness between VSS terminal A and AT main relay terminal C
  • Short to GND in wiring harness between VSS terminal B and TCM terminal Z
  • Short to power supply in wiring harness between VSS terminal B and TCM terminal Z
  • Open circuit in wiring harness between VSS terminal C and body GND
  • VSS malfunction
  • TCM connector or terminal malfunction
  • Open circuit in wiring harness between VSS terminal B and TCM terminal Z
  • TCM malfunction
G08150720