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Home >> Mazda >> 2018 >> MX-5 Miata Sport, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine Control >> No. 9 Fast Idle/Runs On >> Related PIDs

Related PIDs

Item (definition) Unit/Condition Definition Condition/Specification (Reference)
AC_REQ Off/On A/C switch status received by PCM via CAN
  • A/C switch on: On
  • A/C switch off: Off
APP1 % Accelerator pedal opening angle (absolute value) input from APP sensor No. 1
  • Accelerator pedal released: Approx. 15.29%
  • Accelerator pedal fully depressed: Approx. 90.98%
V APP sensor No. 1 voltage
  • Accelerator pedal released: Approx. 0.77 V
  • Accelerator pedal fully depressed: Approx. 4.55 V
APP2 % Accelerator pedal opening angle (absolute value) input from APP sensor No. 2
  • Accelerator pedal released: Approx. 7.84%
  • Accelerator pedal fully depressed: Approx. 45.49%
V APP sensor No. 2 voltage
  • Accelerator pedal released: Approx. 0.38 V
  • Accelerator pedal fully depressed: Approx. 2.27 V
CPP (MT) Off/On Clutch pedal position
  • Clutch pedal released: Off
  • Clutch pedal fully depressed: On
CPP/PNP (MT) Off/On Shift lever position
  • Neutral: On
  • Other than neutral: Off
ECT °C, °F Engine coolant temperature input from ECT sensor No. 1
  • Displays ECT
V ECT sensor No. 1 voltage Ignition switched ON (engine off)
  • ECT is 92 °C {198 °F}: Approx. 0.65 V Idle (after warm up)
  • ECT is 93 °C {199 °F}: Approx. 0.64 V Racing (Engine speed is 2, 000 RPM)
  • ECT is 92 °C {198 °F}: Approx. 0.66 V Racing (Engine speed is 4, 000 RPM)
  • ECT is 93 °C {199 °F}: Approx. 0.64 V
FUEL_PRES KPa {MPA.EN_US}, mBar {BAR.EN_US}, psi, in H20 Fuel pressure input from fuel pressure sensor
  • Displays fuel pressure
V Fuel pressure sensor voltage Ignition switched ON (engine off)
  • Fuel pressure is approx. 3.6 MPa {37 kgf/cm 2 , 522 psi}: Approx. 1.01 V (ECT is 92 °C {198 °F}) Idle (after warm up)
  • Fuel pressure is approx. 3.45 MPa {35.2 kgf/cm 2 , 500 psi}: Approx. 1 V (ECT is 92 °C {198 °F})

    Racing (Engine speed is 2, 000 RPM)

  • Fuel pressure is approx. 3.21 MPa {32.7 kgf/cm 2 , 466 psi}: Approx. 0.96 V (ECT is 86 °C {187 °F})

    Racing (Engine speed is 4, 000 RPM)

  • Fuel pressure is approx. 5.59 MPa {57.0 kgf/cm 2 , 811 psi}: Approx. 1.29 V (ECT is 84 °C {183 °F})
LOAD % Ratio of actual amount of intake air to the maximum air charging amount (mass volume) of cylinder
  • Idle (after warm up): Approx. 27.05% (ECT is 91 °C {196 °F})
  • Racing (engine speed is 2, 000 RPM): Approx. 16.86% (ECT is 89 °C {192 °F})
  • Racing (engine speed is 4, 000 RPM): Approx. 17.64% (ECT is 87 °C {189 °F})
LONGFT1 % Fuel learning correction amount estimated based on A/F sensor signal
  • Idle (after warm up): Approx. -1.56% (ECT is 91 °C {196 °F})
  • Racing (engine speed is 2, 000 RPM): 2.34% (ECT is 89 °C {192 °F})
  • Racing (engine speed is 4, 000 RPM): 2.34% (ECT is 87 °C {189 °F})
O2S11 μA A/F sensor current
  • Idle (after warm up): -59 μA (ECT is 92 °C {198 °F})
  • Deceleration fuel cut (accelerator pedal released from engine speed of 4, 000 RPM or more): Approx. 3.48 mA (ECT is 92 °C {198 °F})
O2S12 V HO2S voltage
  • Idle (after warm up): 0-1.0 V (ECT is 91 °C {196 °F})
  • Deceleration fuel cut (accelerator pedal released from engine speed of 4, 000 RPM or more): Approx. 0 V (ECT is 92 °C {198 °F})
RPM RPM Engine speed
  • Displays engine speed
SHRTFT1 % Fuel feedback correction amount estimated based on A/F sensor signal
  • Idle (after warm up): Approx. 0% (ECT is 91 °C {196 °F})
  • Racing (engine speed is 2, 000 RPM): Approx. 0.78% (ECT is 89 °C {192 °F})
  • Racing (engine speed is 4, 000 RPM): Approx. -21.87% (ECT is 87 °C {189 °F})
TP_REL % Throttle valve opening angle (relative value) with value at throttle valve fully close timing as the start point
  • Accelerator pedal released: Approx. 12.15%
  • Accelerator pedal fully depressed: Approx. 81.96%
VSS KPH, MPH Vehicle speed
  • Displays vehicle speed