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Home >> Mazda >> 2021 >> CX-3 FWD >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine >> No. 13 Knocking/Pinging-Acceleration/Cruise >> Related PIDs
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Related PIDs

Item (definition) Unit/Condition Definition Condition/Specification (Reference)
BARO KPa {MPA}, mBar {BAR}, psi, in H20 Actually measured barometric pressure input from BARO sensor built into PCM
  • Displays BARO
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 29°C {84°F}: Approx. 2.65 V

Idle (after warm up)
  • ECT is 88°C {190°F}: Approx. 0.71 V
IAT2 °C, °F Intake air temperature (No. 2) input from IAT sensor No. 2
  • Displays IAT (No. 2)
V IAT sensor No. 2 voltage
  • IAT2 is 20°C {68°F}: Approx. 3.57 V
  • IAT2 is 40°C {104°F}: Approx. 2.70 V
  • IAT2 is 60°C {140°F}: Approx. 1.87 V
MAF g/Sec Mass air flow input from MAF sensor
  • Displays MAF
V MAF sensor voltage Without coolant control valve
  • Ignition switched ON (engine off) (MAF: 0.59 g/s {0.078 lb/min}): Approx. 0.72 V
  • Idle (after warm up) (MAF: 2.17 g/s {0.287 lb/min}): Approx. 0.97 V
  • Racing (engine speed is 2, 000 RPM) (MAF: 4.73 g/s {0.626 lb/min}): Approx. 1.26 V

With coolant control valve
  • 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. 4.12 V
  • Idle (after warm up) (MAP: 33 kPa {0.34 kgf/cm 2 , 4.8 psi}): Approx. 1.9 V
  • Racing (engine speed is 2, 000 RPM) (MAP: 26 kPa {0.27 kgf/cm 2 , 3.8 psi}): Approx. 1.23 V