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Home >> Mazda >> 2011 >> CX-7 s Touring, 2.3 L, AWD >> 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:
  • PIDs for the following parts are not available on this model. Perform the specific inspections for the following parts:
  1. Connect the M-MDS to the DLC-2.
  2. Turn the ignition switch to the ON position.
  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, FAN_DUTY2, FP, IMRC, INJ_1, INJ_2, INJ_3, INJ_4, SEGRP, TEST, VT DUTY1 Wt, WGC
        Fig 1: Locating DLC-2 Connector
        G06724811Courtesy of MAZDA MOTORS CORP.

      PID/DATA monitor table (reference) 

      PID/DATA MONITOR REFERENCE CHART

      Monitor item (Definition) Unit/Condition Condition/Specification (Reference) Inspection item PCM terminal
      AAT (Ambient air temperature) °C °F Ignition switch to the ON position: 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) % Ignition switch to the ON position:
      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 (Accelerator pedal position) % Accelerator pedal is released: 31.0-32.4%
      Accelerator pedal is depressed: 69.8-81.8%
      • APP sensor
      		 1Y
      V Accelerator pedal is released: 1.56-1.65V
      Accelerator pedal is depressed: 3.65-3.93 V
      APP2 (Accelerator pedal position) % Accelerator pedal is released: 20.2-21.4%
      Accelerator pedal is depressed: 58.8-70.8%
      • APP sensor
      		 1AC
      V Accelerator pedal is released: 1.01-1.10V
      Accelerator pedal is depressed: 3.10-3.38 V
      ARPMDES (Target engine speed) RPM Indicate the target engine speed
      • The following PIDs:

      • IAT, RPM, MAP, ECT, MAF, TP REL, INGEAR, PSP, ALTT V
      		 -
      BARO (Barometric pressure) Pa Ignition switch is ON at sea level: Approx. 101 kPa{1.01 Bar, 14.6 psi}
      • BARO sensor
      		 -
      V Ignition switch is ON at sea level: Approx. 4.0 V
      BAT (Boost air temperature) °C Boost air temperature is displayed
      • 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°F}: 1.7-1.9 V
      BOO (Brake switch) OFF/ON Brake pedal depressed: ON
      Brake pedal released: OFF
      • Brake switch No. 1
      		 1AB
      BPA (Brake pressure applied switch) OFF/ON Brake pedal depressed: ON
      Brake pedal released: OFF
      • Brake switch NO. 2
      		 1AF
      CATT11_DSD (Estimated catalytic converter temperature) °C °F Indicates the estimated catalytic converter temperature
      • Perform applicable DTC troubleshooting.
      		 -
      CHRGLP (Generator warning light) OFF/ON Ignition switch to the ON position: ON
      Idle: OFF
      • Perform applicable DTC troubleshooting.
      		 -
      ECT (Engine coolant temperature) °C °F Ignition switch to the ON position: Indicates the ECT
      • ECT sensor
      		 2AH
      V ECT 20°C {68°F}: 3.04-3.14 V
      ECT 60°C {140°F}: 1.29-1.39 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) % Ignition switch to the ON position: 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 100°C {212°F}: 30%
      ECT 106°C {223°F}: 70%
      ECT 110°C {230°F}: 100%
      • Fan control module NO. 1
      		 1AE
      FAN_DUTY2 (Fan duty cycle) % ECT less than 98°C {208°F}: 0%
      ECT 100°C {212°F}: 30%
      ECT 106°C {223°F}: 70%
      ECT 110°C {230°F}: 100%
      • Fan control module NO. 2
      		 1R
      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. 2.625 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
      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/CL/OL-Drive/OL-Fault/CL-Fault Ignition switch to the ON position: OL_Drive
      Idle (after warm up): CL
      • The following PIDs:
        • IAT, MAF, TP REL, MAP, ECT, RPM, O2S11, O2S12, INGEAR, PSP, VPWR, ALTT V
      • Fuel injector
      		 -
      HTR11 (A/F sensor heater) OFF/ON Idle (after warm up): ON OFF
      • The following PIDs:
        • IAT, MAF, TP, 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, ACSW
      • HO2S heater
      		 2D
      IAT
      (Intake air temperature)      		 °C °F Ignition switch to the ON position position: Indicates 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 60°C {140°F}:ON
      Others: OFF
      • The following PIDs:
        • TP, 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) ° Ignition switch to the ON position: 0 °
      Idle: 0 °
      • KS
      		 2U
      2V
      LOAD (Engine load) % Ignition switch to the ON position: 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/s Ignition switch to the ON position: Approx. 0 g/s
      Idle (after warm up): 2.72-2.94 g/s
      Engine speed is 2,500 rpm: 8.00-8.66
      • MAF/IAT sensor
      		 1AK
      V Ignition switch to the ON position: Approx. 0.7 V
      Idle (after warm up): Approx. 1.3 V
      MAP (Manifold absolute pressure) Pa Ignition switch to the ON position: Indicates the atmospheric pressure
      • MAP sensor
      		 2AG
      V Ignition switch to the ON position: Approx. 1.9 V
      Idle (after warm up): Below 1.0 V
      MIL (Malfunction indicator lamp) OFF/ON Ignition switch to the ON position: 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
      PSP (Power steering pressure switch) OFF/ON Steering wheel in straight ahead position: OFF
      Wheel turning steering wheel: ON
      • PSP switch
      		 1AD
      RO2FT1 (HO2S fuel trim) %
      • Idle after warm-up: Approx. 0.2
      • The following PI D - O2S12
      		 2Q
      RPM (Engine speed) RPM Indicates the engine speed
      • CKP sensor
      		 2W
      SCCS (Speed control command switch) V Press ON/OFF: Approx. 0 V
      Press CANCEL: Approx. 1.1 V
      Press SET/-: Approx. 3.1 V
      Press RES/+: Approx. 4.2 V
      Others: Approx. 5.0 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, PSP, VPWR
      • Ignition coil
      		 2AT
      2AW
      2AX
      2BA
      TEST OFF/ON - - -
      TH_M (Thermostat monitor) - Indicates heat radiation ratio (heat radiation when thermostat is malfunctioning/heat radiation when thermostat is normal) when thermostat monitoring is finished
      • Thermostat
      		 -
      °C °F Indicates engine coolant temperature when thermostat monitoring is finished -
      TH_M_MAX (Thermostat monitor max) - Indicates upper limit of heat radiation ratio (heat radiation when thermostat is malfunctioning/heat radiation when thermostat is normal) for thermostat monitoring execution
      • Thermostat
      		 -
      °C °F Indicates upper limit of engine coolant temperature for thermostat monitoring execution -
      TH_M_MIN (Thermostat monitor min) - Indicates lower limit of heat radiation ratio (heat radiation when thermostat is malfunctioning/heat radiation when thermostat is normal) for thermostat monitoring execution
      • Thermostat
      		 -
      °C °F Indicates lower limit of engine coolant temperature for thermostat monitoring execution -
      TP REL (Relative TP) % Ignition switch to the ON position (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 1) % Ignition switch to the ON position (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 Ignition switch to the ON position (after warm up)
      APP is released: Approx. 0.7 V
      APP is depressed: Approx. 0.7 V
      TP2 (TP sensor 2) % Ignition switch to the ON position (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 Ignition switch to the ON position (after warm up)
      APP is released: Approx. 4.3 V
      APP is depressed: Approx. 4.3 V
      TPCT (Lowest closed throttle voltage) V Ignition switch to the ON position: 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.
      		 -
      VT ACT1 (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, 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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