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Home >> Mazda >> 2011 >> 3 Mazdaspeed, 2.3 4 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System [L3 With TC] >> Pcm Inspection >> Using the M-MDS
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Using the M-MDS

NOTE:
  1. Connect the M-MDS to the DLC-2.
  2. Switch the ignition to ON.
  3. Measure the PID value.
    • If PID value is not within the specification, follow the instructions in the "Inspection item" column.
      NOTE:
      • The PID/DATA MONITOR function monitors the calculated value of the input/output signals in the PCM. Therefore, an output device malfunction is not directly indicated as a malfunction of the monitored value for the output device. If a monitored value of an output device is out of specification, inspect the monitored value of the input device related to the output control.
      • For input/output signals except those of the monitoring items, use a voltmeter to measure the PCM terminal voltage.
      • The simulation items that are used in the ENGINE CONTROL SYSTEM OPERATION INSPECTION are as follows.
        • ACCS, ALTF, ARPMDES, EVAPCP, EVAPCV, FAN_DUTY, FP, IMRC, INJ_1, INJ_2, INJ_3, INJ_4, SEGRP, TEST, VT DUTY, wt, WGC
          Fig 1: Identifying DLC-2
          G07868457Courtesy of MAZDA MOTORS CORP.
    PID/DATA MONITOR TABLE (REFERENCE)

    Monitor item (Definition) Unit/Condition Condition/Specification (Reference) Inspection item PCM terminal
    AAT (Ambient air temperature) °C °F Switch the ignition to ON: Indicates the ambient air temperature
    • IAT sensor
    		 1M
    AC_REQ (A/C request signal) OFF/ON A/C switch OFF: OFF
    A/C switch ON: ON    		 Perform applicable
    DTC troubleshooting    		 -
    ACCS (A/C relay) OFF/ON A/C relay OFF: OFF
    A/C relay ON: ON
    • The following PIDs:
      • RPM, TP REL, ECT
    • A/C relay
    		 1I
    AFR (Air/fuel ratio) - Target air-fuel ratio is displayed
    • A/F sensor
    		 2Z
    2AC
    2AD
    AFR_ACT (Actual air/fuel ratio) - Actual air-fuel ratio is displayed
    • A/F sensor
    		 2Z
    2AC
    2AD
    ALTF (Generator field coil control duty value) % Switch the ignition to ON: 0% Idle: 0-100%
    Just after A/C switch ON and fan switch ON at idle: Duty value rises
    • The following PIDs:
      • IAT, ECT, RPM, VPWR, ALTT V
    • Generator
    		 1AW
    ALTT V (Generator output voltage) V Idle (no E/L): Approx. 14 V (This is an internal calculation value and differs from the terminal voltage).
    • Generator
    		 1AX
    APP1 (APP sensor No. 1) % Accelerator pedal is released: Approx. 8%
    Accelerator pedal is depressed: Approx. 68%
    • APP sensor
    		 1Y
    V Accelerator pedal is released: Approx. 0.4 V
    Accelerator pedal is depressed: Approx. 3.4 V
    APP2 (APP sensor No. 2) % Accelerator pedal is released: Approx. 8%
    Accelerator pedal is depressed: Approx. 68%
    • APP sensor
    		 1AC
    V Accelerator pedal is released: Approx. 0.4 V
    Accelerator pedal is depressed: Approx. 3.4 V
    ARPMDES (Target engine speed) RPM Indicate the target engine speed
    • The following PIDs:
      • IAT, RPM, MAP, ECT, MAF, TP REL, ING EAR, ALTT V
    		 -
    BARO (Barometric pressure) Pa Indicate the BARO
    • BARO sensor
    		 -
    V Switch the ignition to ON at sea level: Approx. 4.0 V
    BAT (Boost air temperature) °C °F Indicate the boost air temperature
    • MAP/boost air temperature sensor
    		 2N
    V Boost air temperature 20°C {68°F}: 2.4-2.6 V Boost air temperature 30°C {86 CF}: 1.7-1.9 V
    BOO (Brake switch) OFF/ON Brake pedal depressed: ON Brake pedal released: OFF
    • Brake switch No. 1
    		 1AB
    BRA (Brake pressure applied switch) OFF/ON Brake pedal depressed: ON Brake pedal released: OFF
    • Brake switch No. 2
    		 -
    CATT11_DSD (Estimated catalytic converter temperature) °C °F Indicates the estimated catalytic converter temperature
    • Perform applicable DTC troubleshooting.
    		 -
    CHRGLP (Generator warning light) OFF/ON Switch the ignition to ON: ON Idle: OFF
    • Perform applicable DTC troubleshooting.
    		 -
    COLP (Refrigerant pressure sensor) OFF/ON Refrigerant pressure is more than the specification: ON
    Refrigerant pressure is less than the specification: OFF
    • Refrigerant pressure sensor
    		 -
    CPP (Clutch pedal position) OFF/ON Clutch pedal depressed: ON Clutch pedal released: OFF
    • Clutch switch
    		 1D
    CPP/PNP (Shift lever position) OFF/ON Neutral position: ON Others: OFF
    • Neutral switch
    		 IS
    ECT (Engine coolant temperature No. 1) °C °F Indicate the ECT
    • ECT sensor No. 1
    		 2AH
    V ECT 20°C {68°F}: 3.04-3.14 V
    ECT 60°C {140°F}: 1.29-1.39 V
    ECT2 (Engine coolant temperature No. 2) °C °F Indicate the ECT No. 2
    • ECT sensor No. 2
    		 2AP
    V ECT 20°C {68°F}: 3.04-3.14 V ECT 80°C {176°F}: 0.76-0.83 V
    EQ_RAT11 (Equivalence ratio (lambda)) - Idling after warm-up: Approx. 1
    • Perform applicable DTC troubleshooting.
    		 -
    EQ_RAT11_DSD (Desired equivalence ratio (lambda)) - Idling after warm-up: Approx. 1
    • Perform applicable DTC troubleshooting.
    		 -
    ETC_ACT (Electronic throttle control actual) ° Indicates the desired TP by angle
    • Perform applicable DTC troubleshooting.
    		 2A
    2B
    ETC_DSD (Electronic throttle control desired) % Indicates the desired TP by percent
    • The following PIDs:
      • APP1, APP2, ETC_ACT
    • TP sensor
    		 -
    ° Indicates the desired TP by angle
    EVAPCP (Purge solenoid valve duty value) % Switch the ignition to ON: 0%
    Idle: 0%
    • The following PIDs:
      • IAT, RPM, ECT, MAF, O2S11, BARO, INGEAR, VPWR
    • Purge solenoid valve
    		 2AB
    EVAPCV (Evaporative emission canister vent valve) OFF/ON Simulation item (EVAPCV) is ON: ON
    • CV solenoid valve
    		 1AS
    FAN_DUTY (Fan duty cycle) % ECT less than 98°C {208°F}: 0%
    ECT more than 110°C {230°F}: 90%
    • Fan control module
    		 1AE
    FCL (Fuel cap warning light) OFF/ON
    • Fuel cap warning light not illuminated: OFF
    • Fuel cap warning light illuminated: ON
    • Perform applicable DTC troubleshooting.
    		 -
    FIA (Fuel injection amount) - Indicates the fuel injection amount.
    • Fuel injector
    • Fuel Injector relay
    		 -
    FLI (Fuel level) % Fuel gauge level F: Approx. 100%
    Fuel gauge level E: Approx. 0%
    • Perform applicable DTC troubleshooting.
    		 -
    FP (Fuel pump relay) OFF/ON Idle: ON Cranking: ON
    • The following PIDs:
      • RPM
    • Fuel pump relay
    		 1H
    FP_Hi_PRES (High pressure fuel pump) Off/On Spill valve control solenoid valve work: On Spill valve control solenoid valve don't work: Off
    • High pressure fuel pump
    		 2F
    2G
    FTP (Fuel tank pressure sensor) Pa Indicate the fuel tank pressure
    • Fuel tank pressure sensor
    		 1AG
    V Fuel tank pressure is equal to barometric pressure: approx. 2.6 V
    FUEL_P_DSD (Fuel pressure desired) Pa Indicate the target fuel pressure.
    • The following PIDs:
      • ECT, FUEL PRES, MAF, RPM, VPWR,
    		 -
    FUEL_PRES (Fuel pressure sensor) Pa Idle: Approx. 3 MPa
    Load 60% or more: Approx. 11.5 MPa
    • Fuel pressure sensor
    		 2R
    V Idle: Approx. 1.4 V
    FUELPW (Fuel injector duration) sec Idle: Approx. 450-650 μs
    • The following PIDs:
      • ECT, IAT, RPM, TP REL, MAF, O2S11, O2S12, MAP, VSS, BOO, AC_REQ, VPWR
    		 2AZ
    2BB
    2BC
    2BD
    FUELSYS (Fuel system status) OL/CU OL-Drive/OL-Fault/CL-Fault Switch the ignition to ON: OL_Drive Idle (after warm up): CL
    • The following PIDs:
      • IAT, MAF, TP REL, MAP, ECT, RPM, O2S11, O2S12, INGEAR, VPWR, ALTT V
    • Fuel injector
    		 -
    HTR11 (A/F sensor heater) OFF/ON Idle (after warm up): ON<==>OFF
    • The following PIDs:
      • IAT, MAF, TP REL, ECT, RPM
    • A/F sensor heater
    		 2C
    HTR12 (HO2S heater) OFF/ON Idle: ON
    Engine speed is above 4, 000 rpm: OFF
    • The following PIDs:
      • IAT, MAF, ECT, RPM
    • HO2S heater
    		 2D
    IAT (Intake air temperature) °C °F Indicate the IAT
    • MAF/IAT sensor
    		 1M
    V IAT 20°C {68°F}: 2.4-2.6V IAT 30°C {86°F}: 1.7-1.9V
    IMRC (Variable swirl solenoid valve) OFF/ON Engine speed is below Approx. 3, 250 rpm and ECT is below 0°C {32°F}: ON
    Others: OFF
    • The following PIDs:
      • TP REL, ECT, RPM
    • Variable swirl solenoid valve
    		 2AS
    INGEAR (Load/no load condition) OFF/ON Driving range: ON
    Except above: OFF
    Others: ON
    • Perform applicable DTC troubleshooting.
    		 -
    IVS (CTP condition) Idle/Off Idle APP closed: Idle Others: Off Idle
    • Perform applicable DTC troubleshooting.
    		 -
    KNOCKR (Knocking retard) ° Switch the ignition to ON: 0 ° Idle: 0 °
    • KS
    		 2U
    2V
    LOAD (Engine load) % Switch the ignition to ON: 0%
    Idle (after warm up): 17.1-18.5%
    Engine speed is 2, 500 rpm: 14.2-15.2
    • MAF/IAT sensor
    		 -
    LONGFT1 (long term fuel trim) % Idle (after warm up):-14-14%
    • Perform applicable DTC troubleshooting.
    		 -
    MAF (Mass airflow) g/sec Indicate the MAF
    • MAF/IAT sensor
    		 1AK
    V Switch the ignition to ON: Approx. 0.7 V Idle (after warm up): Approx. 1.3 V
    MAP (Manifold absolute pressure) Pa Indicate the MAP
    • MAP sensor
    		 2AG
    V Switch the ignition to ON: Approx. 1.9V Idle (after warm up): Below 1.0 V
    MIL (Malfunction indicator lamp) OFF/ON Switch the ignition to ON: ON
    Idle: OFF
    • Perform applicable DTC troubleshooting.
    		 -
    MIL_DIS (Traveled distance since the MIL illuminated) km mile No DTC: 0 km {0 mile} DTC detected: Not 0 km {0 mile}
    • Perform applicable DTC troubleshooting.
    		 -
    O2S11 (A/F sensor) A Idle (after warm up): -1.0-1.0 A Deceleration (after warm up): 0.25 A or more
    • A/F sensor
    		 2Z
    2AC
    2AD
    O2S12 (HO2S) V Idle: 0-1 V
    • HO2S
    		 2Q
    RO2FT1 (HO2S fuel trim) %
    • Idle after warm-up: Approx. 0.2
    • The following PID
      • O2S12
    		 2Q
    RPM (Engine speed) RPM Indicates the engine speed
    • CKP sensor
    		 2W
    SCCS (Speed control command switch) V OFF switch pressed in: Approx. 0 V CANCEL switch pressed in:
    Approx. 1.4 V
    SET/- switch pressed in: Approx. 2.4 V
    RES/+ switch pressed in: Approx. 3.9 V
    ON switch pressed in: Approx. 4.3 V
    Except above: Approx. 4.7 V
    • Cruise control switch
    		 1AQ
    SEGRP (EGR valve (stepping motor) position) - Idle: 0
    Engine speed is 1, 187-4200 rpm: 0-57
    • The following PIDs:
      • MAF, TP REL, ECT, RPM, VSS
    • EGR valve
    		 2AM
    2AN
    2AQ
    2AR
    SEGRP DSD (Desired EGR valve (stepping motor) position) % Indicate the desired EGR valve position
    • The following PIDs:
      • MAF, TP REL, ECT, RPM, VSS
    		 -
    SHRTFT1 (Short term fuel trim [A/F sensor]). % Idle (after warm up): Approx.-30-25%
    • Perform applicable DTC troubleshooting.
    		 -
    SPARKADV (Ignition timing) ° Indicate the ignition timing
    • The following PIDs:
      • MAF, TP REL, ECT, RPM, INGEAR, VPWR
    • Ignition coil
    		 2AT
    2AW
    2AX
    2BA
    Test (Test mode) OFF/ON Test mode ON: On Test mode OFF: Off - -
    THM_1 (Thermostat monitor engine coolant temperature No. 1) °C °F Indicates engine coolant temperature No. 1 when thermostat monitoring is finished Thermostat -
    THM_2 (Thermostat monitor engine coolant temperature No. 2) °C °F Indicates engine coolant temperature No. 2 when thermostat monitoring is finished Thermostat -
    THM_MAX_2 (Thermostat monitor engine coolant temperature No. 2 max limit) °C °F Indicates upper limit of engine coolant temperature No. 2 for thermostat monitoring execution Thermostat -
    THM_MIN_1 (Thermostat monitor engine coolant temperature No. 1 min limit) °C °F Indicates lower limit of engine coolant temperature No. 1 for thermostat monitoring execution Thermostat -
    THM_MIN_2 (Thermostat monitor engine coolant temperature No. 2 min limit) °C °F Indicates lower limit of engine coolant temperature No. 2 for thermostat monitoring execution Thermostat -
    TP REL (Relative TP) % Switch the ignition to ON (after warm up) APP is released: Approx. 5% APP is depressed: Approx. 5 %
    NOTE:
    • When the ignition switch is in the ON position (engine is off), the throttle valve is fully closed regardless of the accelerator pedal opening angle.
    • TP sensor
    		 2AK
    2AL
    TP1 (TP sensor No. 1) % Switch the ignition to ON (after warm up) APP is released: Approx. 15 % APP is depressed: Approx. 15 %
    NOTE:
    • When the ignition switch is in the ON position (engine is off), the throttle valve is fully closed regardless of the accelerator pedal opening angle.
    • TP sensor
    		 2AK
    V Switch the ignition to ON (after warm up)
    APP is released: Approx. 0.85 V
    APP is depressed: Approx. 0.85 V
    TP2 (TP sensor No. 2) % Switch the ignition to ON (after warm up)
    APP is released: Approx. 15 %
    APP is depressed: Approx. 15 %
    NOTE:
    • When the ignition switch is in the ON position (engine is off), the throttle valve is fully closed regardless of the accelerator pedal opening angle.
    • TP sensor
    		 2AL
    V Switch the ignition to ON (after warm up) APP is released: Approx. 4.15 V
    APP is depressed: Approx. 4.15 V
    TPCT (Lowest closed throttle voltage) V Switch the ignition to ON: Approx 0.5 V
    • TP sensor
    		 2AK
    2AL
    VPWR (Battery positive voltage) V Indicates the battery voltage
    • Battery
    		 1BA
    VSS (Vehicle speed) KPH MPH Indicates the vehicle speed
    • Perform applicable DTC troubleshooting.
    		 -
    VTACT1 (Actual valve timing) ° Idle: Approx. 0°
    • CMP sensor
    • CKP sensor
    		 2S
    2W
    VT DIFF1 (Difference between actual valve timing and target valve timing) ° Idle: Approx. 0°
    • The following PIDs:
      • RPM, LOAD, VT ACT1
    • CMP sensor
    		 -
    VT DUTY1 (Camshaft position commanded duty cycle) % Idle: Approx. 11.5%
    • The following PIDs:
      • TP REL, ECT, RPM
    • OCV
    		 2AF
    WGC (Wastegate control solenoid valve) % Racing with the accelerator pedal fully depressed: 10-100 %
    • Wastegate control solenoid valve
    		 2AA
    Fully closed: 0 %
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