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Home >> Mazda >> 2010 >> 3 Mazdaspeed, 2.3 3 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System [L3 With TC] >> Pcm Inspection >> Using the M-MDS

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 DUTY1 wt, WGC
    Fig 1: Identifying Data Link Connector (DLC-2)
    G06730862Courtesy of MAZDA MOTORS CORP.

PID/DATA monitor table (reference) 

PID/DATA MONITOR CHART

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
ALTTV (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, INGEAR, 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 °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
 -
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
 1S
ECT (Engine coolant temperature) °C °F Indicate 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) % 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, MAR 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. 2.0 ms
  • 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 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:
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 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) % 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.
 -
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:
    • TPREL, 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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