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Home >> Mazda >> 2021 >> MX-5 Miata Club, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine Control >> No. 12 - Lack/Loss Of Power-Acceleration/Cruise >> Related PIDs

Related PIDs

Item (definition) Unit/Condition Definition Condition/Specification (Reference)
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}, mBar {BAR}, psi, in H20 Fuel pressure (absolute) input from fuel pressure sensor
  • Displays fuel pressure (absolute)
V Fuel pressure sensor voltage Idle (ECT 80°C {176°F})
  • Fuel pressure is 10 MPa {102 kgf/cm2 , 1450 psi}: Approx. 1.4 V
IAT °C, °F Intake air temperature (No. 1) input from IAT sensor No. 1
  • Displays IAT (No. 1)
V IAT sensor No. 1 voltage
  • IAT is 60°C {140°F}: Approx. 1.13 V
  • IAT is 63°C {145°F}: Approx. 1.07 V
  • IAT is 65°C {149°F}: Approx. 1.01 V
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})
MAF g/Sec Mass air flow input from MAF sensor
  • Displays MAF
V MAF sensor voltage
  • Ignition switched ON (engine off) (MAF: 0.00 g/s {0 lb/min}): Approx. 1.69 V (ECT is 53°C {127°F})
  • Idle (after warm up) (MAF: 2.50 g/s {0.331 lb/min}): Approx. 1.89 V (ECT is 93°C {199°F})
  • Racing (engine speed is 2, 000 RPM) (MAF: 3.80 g/s {0.503 lb/min}): Approx. 2.02 V (ECT is 95°C {203°F})
MAP KPa {MPA}, mBar {BAR}, psi, in H20 Manifold absolute pressure input from MAP sensor
  • Displays MAP
MAP_V V MAP sensor voltage
  • Ignition switched ON (engine off) (MAP:101 kPa {1.03 kgf/cm 2 , 14.6 psi}): Approx. 4.08 V (ECT is 89°C {192°F})
  • Idle (after warm up) (MAP: 31 kPa {0.32 kgf/cm 2 , 4.5 psi}): Approx. 1.25 V (ECT is 88°C {190°F})
  • Racing (engine speed is 2, 000 RPM) (MAP: 32 kPa {0.33 kgf/cm 2 , 4.6 psi}): Approx. 1.31 V (ECT is 89°C {192°F})
  • Racing (engine speed is 4, 000 RPM) (MAP: 49 kPa {0.50 kgf/cm 2 , 7.1 psi}): Approx. 2.03 V (ECT is 89°C {192°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
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