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Home >> Mazda >> 2011 >> CX-7 i SV, 2.5 5 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System [L5] >> Pcm Inspection >> Using M-MDS
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Using M-MDS

NOTE:
  • PIDs for the following parts are not available on this model. Go to the appropriate part inspection information.
    • CMP sensor
    • Main relay
  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 Action 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.
        Fig 1: Locating DLC-2 Connector
        G06724812Courtesy of MAZDA MOTORS CORP.
      • 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, IMTV, INJ_1~4, SEGRP, TEST, VT Duty1 wt

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 Indicates the ambient air temperature IAT sensor 1AC
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
A/C relay
Inspect following PIDs: RPM, TP REL, ECT.
1I
AFR (Target 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) % Just after A/C switch ON and fan switch ON at idle: Duty value rises Generator
Inspect following PIDs: IAT, ECT, RPM, VPWR, ALTT V.
2AA
ALTT V (Generator output voltage) V Turn the ignition switch to the ON position: 0 V
Idle: approx. 14 V(1) (E/L not operating)
Generator 2AF
APP (APP sensor) %
  • Accelerator pedal released: approx. 0 %
  • Accelerator pedal depressed: approx. 100%
APP sensor 1AO
1AP
APP1 (APP sensor No. 1) %
  • Accelerator pedal released: approx. 15 %
  • Accelerator pedal depressed: approx. 80 %
APP sensor No. 1 1AP
V
  • Accelerator pedal released: 1.56-1.65V
  • Accelerator pedal depressed: 3.65-3.93 V
APP 2 (APP sensor No. 2) %
  • Accelerator pedal released: approx. 7.5 %
  • Accelerator pedal depressed: approx. 42 %
APP sensor No. 2 1AO
V
  • Accelerator pedal released: approx. 0.4 V
  • Accelerator pedal depressed: approx. 2.0 V
ARPMDES (Target engine speed) RPM
  • Indicate the target engine speed
Inspect following PIDs: IAT, RPM, MAP, ECT, MAF, TP REL, INGEAR, ALTT V. -
BARO (Barometric pressure) kPa, psi, Bar Indicate the BARO BARO sensor -
V
  • Turn the ignition switch to the ON position (at sea level): approx. 4.1 V
BOO (Brake switch) OFF/ON Brake pedal depressed: ON
Brake pedal released: OFF
Brake switch No. 1 1AB
BPA(2) (Brake pressure applied switch) OFF/ON Brake pedal depressed: ON
Brake pedal released: OFF
Brake switch No. 2 1AF
CATT11_DSD (Desired catalyst temperature bank one, sensor one) °C °F Indicate the estimated catalytic converter temperature Perform applicable DTC troubleshooting. -
CHRGLP (Generator warning light) OFF/ON Turn the ignition switch to the ON position: ON
Idle: OFF
Perform applicable DTC troubleshooting. -
COLP (Refrigerant pressure sensor) OFF/ON Refrigerant pressure is above 1.96 Mpa {20.0 kgf/cm2 , 284 psi}: ON Refrigerant pressure sensor -
ECT (Engine coolant temperature) °C °F Indicate the ECT ECT sensor 2AH
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. 2Z
2AC
2AD
EQ_RAT11_DSD (Desired equivalence ratio (lambda)) - Idling after warm-up: approx. 1 Perform applicable DTC troubleshooting. -
ETC_ACT (Electronic throttle control actual) ° Indicate the desired TP by angle Perform applicable DTC troubleshooting. 2BE, 2BF
ETC_DSD (Electronic throttle control desired) % Indicate the desired TP by percent TP sensor
Inspect following PIDs: APP1, APP2, ETC_ACT.
-
° Indicate the desired TP by angle
EVAPCP (Purge solenoid valve duty value) % Turn the ignition switch to the ON position: 0%
Idle: 0%
Purge solenoid valve
Inspect following PIDs: IAT, RPM, ECT, MAF, O2S11, INGEAR, VPWR.
1BA
EVAPCV (Evaporative emission canister vent valve) OFF/ON Simulation item (EVAPCV) is ON: ON CV solenoid valve 1M
FAN_DUTY (Fan control module) %
  • When all of following condition are met: 50%
    • Test mode ON
    • WOT
Fan control module 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. -
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 Turn the ignition switch to the ON position: OFF
Idle: ON
Cranking: ON
Fuel pump relay
Inspect following PIDs: RPM.
1BG
FTP (Fuel tank pressure sensor) kPa, psi, Bar Indicate the fuel tank pressure Fuel tank pressure sensor 1AH
V Fuel tank pressure is equal to barometric pressure: approx. 2.6 V
FUELPW (Fuel injector duration) sec Idle (after warm up): approx. 2.2 ms Fuel injector
Inspect following PIDs: IAT, MAF, TP REL, MAP, ECT, RPM, O2S11, O2S12, INGEAR, VPWR, ALTT V.
2AZ
2BB
2BC
2BD
FUELSYS (Fuel system status) OL/CL/CL-Fault/OL-Fault/OL-Drive Idle (after warm up): CL Fuel injector
Inspect following PIDs: IAT, MAF, TP REL, MAP, ECT, RPM, O2S11, O2S12, INGEAR, VPWR, ALTT V.
-
HTR11 (A/F sensor heater) OFF/ON Idle (after warm up): ON<=>OFF A/F sensor
Inspect following PIDs: IAT, MAF, TP REL, ECT, RPM.
2A
HTR12 (HO2S heater) OFF/ON Idle (after warm up): ON<=>OFF HO2S heater
Inspect following PIDs: IAT, MAF, ECT, RPM.
2B
IAT (Intake air temperature) °C °F Indicate the IAT IAT sensor 1AC
V IAT 20°C {68°F}: approx. 2.38 V
IAT 60°C {140°F}: approx. 0.89 V
IMRC (Variable tumble solenoid valve) OFF/ON
  • ECT below 60°C {140°F} and engine speed below 3,750 RPM : On
  • ECT above 60°C {140°F} while idling.: Off
Variable tumble solenoid valve Inspect following PIDs: TP REL, ECT, RPM. 21
IMRC_POS (Variable tumble shutter valve switch) V
  • ECT below 60°C {140°F} and engine speed below 3,750 RPM : 3.408-4.432 V
  • ECT above 60°C {140°F} while idling.: 0.808-1.832 V
Variable tumble shutter valve switch 2R
IMTV (Variable Intake air control solenoid valve) OFF/ON Engine speed is below approx. 4,400 RPM: On
Others: Off
Variable intake air control solenoid valve
Inspect following PIDs: RPM.
2J
INGEAR (Load/no load condition) OFF/ON
  • Driving range: On
  • Except above: Off
TR switch -
IVS (CTP condition) Idle/Off_Idle
  • CTP: Idle
  • Others: Off Idle
Perform applicable DTC troubleshooting. -
KNOCKR (Knocking retard) ° Turn the ignition switch to the ON position: 0°
Idle: 0°
KS 2U
2V
LOAD (Engine load) % Turn the ignition switch to the ON position: 0%
Idle (after warm up): approx.15%
Inspect following PIDs: MAP, IAT, MAF, RPM. -
LONGFT1 (long term fuel trim) % Idle (after warm up): -15-20% Perform applicable DTC troubleshooting. -
MAF (Mass airflow) g/sec Indicate the MAF MAF sensor 1AK
V Turn the ignition switch to the ON position: approx. 0.7 V
Idle (after warm up): approx. 1.2 V
MAP (Manifold absolute pressure) kPa, psi, Bar Indicate the MAP MAP sensor 2AG
V
  • Turn the ignition switch to the ON position (at sea level): approx. 4.1 V
  • Idle: approx. 1.2 V
MIL (Malfunction indicator lamp) OFF/ON
  • DTC stored: On
  • DTC not stored: Off
Perform applicable DTC troubleshooting. -
MIL_DIS (Travelled distance since the MIL illuminated) km miles Indicate the travelled distance since the MIL illuminated
O2S11 (A/F sensor) A Idle (After warm up): approx. 0 mA A/F sensor 2Z
2AC
2AD
O2S12 (HO2S) V Idle (After warm up): 0-1.0 V HO2S 2Q
PSP (Power steering pressure switch) OFF/ON Steering wheel in straight ahead position: OFF Wheel turning steering wheel: ON PSP switch 2T
RO2FT1 (HO2S fuel trim) % Idle (after warm up): approx. -0.03-0.03 Perform applicable DTC troubleshooting. -
RPM (Engine speed) RPM Indicate the engine speed CKP sensor 2W
SC_CANCEL(2) (CANCEL switch) Inactive/Active CANCEL switch pressed in: Active
Except above: Inactive
Cruise control switch 1AQ
SC_OFF(2) (ON/OFF switch) Inactive/Active ON/OFF switch pressed in (OFF): Active
Except above: Inactive
Cruise control switch 1AQ
SC ON(2) (ON/OFF switch) Inactive/Active ON/OFF switch pressed in (ON): Active
Except above: Inactive
Cruise control switch 1AQ
SC_RES(2) (RESUME switch) Inactive/Active RESUME switch pressed in: Active
Except above: Inactive
Cruise control switch 1AQ
SC_SET(2) (SET(-) switch) Inactive/Active SET(-) switch pressed in: Active
Except above: Inactive
Cruise control switch 1AQ
SC_SET(2) (SET (+) switch) Inactive/Active SET (+) switch pressed in: Active
Except above: Inactive
Cruise control switch 1AQ
SCCS(2) (Cruise control switch) V OFF switch pressed in: approx. 0.05 V
CANCEL switch pressed in: approx. 0.98 V
SET(-) switch pressed in: approx. 1.88 V
SET (+) switch pressed in: approx. 2.73 V
RESUME switch pressed in: approx. 3.45 V
ON switch pressed in (ON): approx. 4.05 V
Cruise control switch 1AQ
SEGRP (EGR valve (stepping motor) position) - Turn the ignition switch to the ON position: 0
Idle: 0 step
Cranking: 0-52
EGR valve
Inspect following PIDs: MAF, TP REL, ECT, RPM, VSS.
2AT, 2AW, 2AX, 2BA
SEGRP DSD (Desired EGR valve position) % Indicate the desired EGR valve position Inspect following PIDs: MAF, TP REL, ECT, RPM, VSS. -
SHRTFT1 (Short term fuel trim) % Idle (after warm up): approx.-25- 25% Perform applicable DTC troubleshooting. -
SPARKADV (Ignition timing) ° Indicate the ignition timing Ignition coil
Inspect following PIDs: MAF, TP REL, ECT, RPM, INGEAR, VPWR.
2G, 2H, 2K, 2L
TEST (Test mode) OFF/ON Test mode ON: On
Test mode OFF: Off
- -
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 throttle position) % Accelerator pedal released: approx. 3%
Accelerator pedal depressed: approx. 75%
TP sensor 2AK
2AL
TP1 (TP sensor No. 1) % Accelerator pedal released: approx. 12%
Accelerator pedal depressed: approx. 84%
TP sensor No. 1 2AK
V Accelerator pedal released: approx. 0.6 V
Accelerator pedal depressed: approx. 4.2 V
TP2 (TP sensor No. 2) % Accelerator pedal released: approx. 12%
Accelerator pedal depressed: approx. 84%
TP sensor No. 2 2AL
V Accelerator pedal released: approx. 4.4 V
Accelerator pedal depressed: approx. 0.8 V
TPCT (TP sensor voltage at CTP) V Turn the ignition switch to the ON position: approx. 0.5 V TP sensor 2AK
2AL
VPWR (Battery positive voltage) V Turn the ignition switch to the ON position: B+ Battery 1C
VSS (Vehicle speed) KPH Indicate the vehicle speed Perform applicable DTC troubleshooting. -
VT ACT1 (Actual valve timing) ° Idle: approx. 0°
Racing after warm up: 0-25°
CMP sensor 2S
VT DIFF1 (Difference between target and actual valve timing) ° Idle: approx. 0° CMP sensor OCV
Inspect following PIDs: TP REL, ECT, RPM.
2E
2S
VT DUTY1 (Oil control valve duty value) % Idle: approx. 11.5% OCV
Inspect following PIDs: TP REL, ECT, RPM.
2E
(1) Calculated value; differs from terminal voltage
(2) With cruise control system