LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2018 >> 3 Touring, 4D Hatchback, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine Control >> Engine Control System Operation Inspection >> Related PIDs
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Related PIDs

Item (definition) Unit/Condition Definition Condition/Specification (Reference)
VT IN_ACT ° Actual intake valve timing
  • Displays actual intake valve timing
VT IN_DES ° Desired intake valve timing
  • Displays desired intake valve timing


Item (definition) Unit/Condition Definition Condition/Specification (Reference)
ECT °C, °F Engine coolant temperature
  • Displays ECT
V ECT sensor No. 1 voltage
  • ECT is 20 °C {68 °F}: Approx. 3.10 V
  • ECT is 40 °C {104 °F}: Approx. 2.16 V
  • ECT is 60 °C {140 °F}: Approx. 1.40 V
  • ECT is 80 °C {176 °F}: Approx. 0.87 V
  • ECT is 100 °C {212 °F}: Approx. 0.54 V
OIL_P_SOL Off/On Engine oil solenoid valve operation status
  • ECT below 98 °C {208 °F} and engine speed below 4, 000 RPM: On
  • ECT above 98 °C {208 °F} or engine speed above 4, 000 RPM: Off
RPM RPM Engine speed
  • Displays engine speed


Item (definition) Unit/Condition Definition Condition/Specification (Reference)
ECT °C, °F Engine coolant temperature
  • Displays ECT
V ECT sensor No. 1 voltage
  • ECT is 20 °C {68 °F}: Approx. 3.10 V
  • ECT is 40 °C {104 °F}: Approx. 2.16 V
  • ECT is 60 °C {140 °F}: Approx. 1.40 V
  • ECT is 80 °C {176 °F}: Approx. 0.87 V
  • ECT is 100 °C {212 °F}: Approx. 0.54 V
IAT °C, °F Intake air temperature (No. 1)
  • Displays IAT (No. 1)
V IAT sensor No. 1 voltage
  • IAT is 20 °C {68 °F}: Approx. 2.70 V
  • IAT is 40 °C {104 °F}: Approx. 1.80 V
  • IAT is 60 °C {140 °F}: Approx. 1.20 V
RPM RPM Engine speed
  • Displays engine speed


Item (definition) Unit/Condition Definition Condition/Specification (Reference)
RPM RPM Engine speed
  • Displays engine speed


Item (definition) Unit/Condition Definition Condition/Specification (Reference)
ETC_ACT ° Actual throttle valve opening angle Ignition switched ON (engine off)
  • Accelerator pedal released: Approx. 12.89 °
  • Accelerator pedal fully depressed: Approx. 86.03 °

    Idle (after warm up)

  • Accelerator pedal released: Approx. 3.2 °
ETC_DSD % Target throttle valve opening angle (percent)
  • Displays target TP opening angle (percent)
° Target throttle valve opening angle
  • Displays target TP opening angle


Item (definition) Unit/Condition Definition Condition/Specification (Reference)
FUELPW Sec Fuel injection pulse width (fuel injector energization time) output to fuel injector
  • Idle (after warm up): Approx. 1.4 ms
  • Racing (engine speed is 2, 000 RPM): Approx. 1.1 ms
  • Racing (engine speed is 4, 000 RPM): Approx. 1.0 ms
RPM RPM Engine speed
  • Displays engine speed

If data monitor function of M-MDS is not used:

  1. Warm up the engine and idle it.
  2. Measure the fuel injector control signal wave profile using the oscilloscope while performing the following steps:
    1. Depress the accelerator pedal and increase the engine speed to 4, 000 RPM.
    2. Quickly release the accelerator pedal (brake pedal is not depressed) and verify that the wave profile constant B+, and the wave appears when the engine speed drops below 1, 200 RPM. (See PCM INSPECTION .)


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%
  • Accelerator pedal fully depressed: Approx. 82%
V APP sensor No. 1 voltage
  • Accelerator pedal released: Approx. 0.75 V
  • Accelerator pedal fully depressed: Approx. 4.1 V
APP2 % Accelerator pedal opening angle (absolute value) input from APP sensor No. 2
  • Accelerator pedal released: Approx. 7.45%
  • Accelerator pedal fully depressed: Approx. 41%
V APP sensor No. 2 voltage
  • Accelerator pedal released: Approx. 0.38 V
  • Accelerator pedal fully depressed: Approx. 2.05 V
EVAPCP % Purge solenoid valve control duty value
  • Idle (after warm up): Approx. 0%
  • Racing (Engine speed 2, 000 RPM): 4.3-35%
  • Racing (Engine speed 4, 000 RPM): Approx. 66%
MAF g/Sec Mass air flow
  • Displays MAF
V MAF sensor voltage
  • 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. 0.86 V
  • Racing (engine speed is 2, 000 RPM) (MAF: 4.73 g/s {0.626 lb/min}): Approx. 1.07 V
LOAD % Ratio of actual amount of intake air to the maximum air charging amount (mass volume) of cylinder
  • Idle (after warm up): Approx. 17.64%
  • Racing (engine speed is 2, 000 RPM): Approx. 14.51%
  • Racing (engine speed is 4, 000 RPM): Approx. 21.17%
TP_REL % Throttle valve opening angle (relative value) with value at throttle valve fully open timing as the start point
  • Accelerator pedal released: Approx. 12%
  • Accelerator pedal fully depressed: Approx. 82%

If simulation function of M-MDS is not used:

  1. Start the engine.
  2. Disconnect the vacuum hose between the purge solenoid valve and the charcoal canister.
  3. Put a finger to the purge solenoid valve and verify that there is no vacuum applied when the engine is cold.
    • If there is a vacuum, inspect the following:
  4. Warm up the engine to the normal operating temperature.
  5. Stop the engine.
  6. Connect the M-MDS to the DLC-2 and verify that DTC P0443:00 is displayed.
  7. Switch the ignition ON (engine off).
  8. Select the ECT PID. (See ON-BOARD DIAGNOSTIC TEST .)
  9. Verify that the engine coolant temperature is above 60 °C {140 °F}.
  10. Set the vehicle on a dynamometer or chassis roller.
    WARNING:
    • When the dynamometer or chassis roller is operating, there is a possibility that the operator may come into contact with or be caught up in the rotating parts, leading to serious injuries or death. When performing work while the dynamometer or chassis roller is operating, be careful not to contact or be caught up in any of the rotating parts.
  11. Drive the vehicle at an engine speed to approx. 2000 RPM for 30 s or more.
  12. Put a finger to the purge solenoid valve and verify that there is no vacuum applied during Step  2.


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%
  • Accelerator pedal fully depressed: Approx. 82%
V APP sensor No. 1 voltage
  • Accelerator pedal released: Approx. 0.75 V
  • Accelerator pedal fully depressed: Approx. 4.1 V
APP2 % Accelerator pedal opening angle (absolute value) input from APP sensor No. 2
  • Accelerator pedal released: Approx. 7.45%
  • Accelerator pedal fully depressed: Approx. 41%
V APP sensor No. 2 voltage
  • Accelerator pedal released: Approx. 0.38 V
  • Accelerator pedal fully depressed: Approx. 2.05 V
ECT °C, °F Engine coolant temperature
  • Displays ECT
V ECT sensor No. 1 voltage
  • ECT is 20 °C {68 °F}: Approx. 3.10 V
  • ECT is 40 °C {104 °F}: Approx. 2.16 V
  • ECT is 60 °C {140 °F}: Approx. 1.40 V
  • ECT is 80 °C {176 °F}: Approx. 0.87 V
  • ECT is 100 °C {212 °F}: Approx. 0.54 V
MAF g/Sec Mass air flow
  • Displays MAF
V MAF sensor voltage
  • 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. 0.86 V
  • Racing (engine speed is 2, 000 RPM) (MAF: 4.73 g/s {0.626 lb/min}): Approx. 1.07 V
LOAD % Ratio of actual amount of intake air to the maximum air charging amount (mass volume) of cylinder
  • Idle (after warm up): Approx. 17.64%
  • Racing (engine speed is 2, 000 RPM): Approx. 14.51%
  • Racing (engine speed is 4, 000 RPM): Approx. 21.17%
TP_REL % Throttle valve opening angle (relative value) with value at throttle valve fully open timing as the start point
  • Accelerator pedal released: Approx. 12%
  • Accelerator pedal fully depressed: Approx. 82%


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%
  • Accelerator pedal fully depressed: Approx. 82%
V APP sensor No. 1 voltage
  • Accelerator pedal released: Approx. 0.75 V
  • Accelerator pedal fully depressed: Approx. 4.1 V
APP2 % Accelerator pedal opening angle (absolute value) input from APP sensor No. 2
  • Accelerator pedal released: Approx. 7.45%
  • Accelerator pedal fully depressed: Approx. 41%
V APP sensor No. 2 voltage
  • Accelerator pedal released: Approx. 0.38 V
  • Accelerator pedal fully depressed: Approx. 2.05 V
scientia non olet · About LEMON Manuals