Contents Section: Removal & Installation All sections

Engine Controls - Control System [L5]: Other Mazda CX-7 I рестайлинг

Removal & Installation 1 illustration ~315 words

Using M-MDS

Note. PIDs for the following parts are not available on this model. Go to the appropriate part inspection page. CMP sensor Main relay

Scheme 126

Scheme 126: Using M-MDS
  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. 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)

Monitor item (Definition)Unit/ConditionCondition/Specification (Reference)Inspection itemPCM terminal
AAT (Ambient air temperature)°C°FIndicates the ambient air temperatureIAT sensor1AC
AC_REQ (A/C request signal)OFF/ONA/C switch OFF: OFF A/C switch ON: ONPerform applicable DTC troubleshooting
ACCS (A/C relay)OFF/ONA/C relay OFF: OFF A/C relay ON: ONA/C relay Inspect following PIDs: RPM, TP REL, ECT.1I
AFR (Target air fuel ratio)Target air fuel ratio is displayedA/F sensor2Z 2AC 2AD
AFR_ACT (Actual air fuel ratio)Actual air fuel ratio is displayedA/F sensor2Z 2AC 2AD
ALTF (Generator field coil control duty value)%Just after A/C switch ON and fan switch ON at idle: Duty value risesGenerator Inspect following PIDs: IAT, ECT, RPM, VPWR, ALTT V.2AA
ALTT V (Generator output voltage)VTurn the ignition switch to the ON position: 0 V Idle: approx. 14 V (1) (E/L not operating)Generator2AF
APP (APP sensor)%Accelerator pedal released: approx. 0 % Accelerator pedal depressed: approx. 100%APP sensor1AO 1AP
APP1 (APP sensor No. 1)%Accelerator pedal released: approx. 15 % Accelerator pedal depressed: approx. 80 %APP sensor No. 11AP
VAccelerator 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. 21AO
VAccelerator pedal released: approx. 0.4 V Accelerator pedal depressed: approx. 2.0 V
ARPMDES (Target engine speed)RPMIndicate the target engine speedInspect following PIDs: IAT, RPM, MAP, ECT, MAF, TP REL, INGEAR, ALTT V.
BARO (Barometric pressure)KPa, psi, BarIndicate the BAROBARO sensor
VTurn the ignition switch to the ON position (at sea level): approx. 4.1 V
BOO (Brake switch)OFF/ONBrake pedal depressed: ON Brake pedal released: OFFBrake switch No. 11AB
BPA (2) (Brake pressure applied switch)OFF/ONBrake pedal depressed: ON Brake pedal released: OFFBrake switch No. 21AF
CATT11_DSD (Desired catalyst temperature bank one, sensor one)°C°FIndicate the estimated catalytic converter temperaturePerform applicable DTC troubleshooting.
CHRGLP (Generator warning light)OFF/ONTurn the ignition switch to the ON position: ON Idle: OFFPerform applicable DTC troubleshooting.
COLP (Refrigerant pressure sensor)OFF/ONRefrigerant pressure is above 1.96 Mpa {20.0 kgf/cm 2 , 284 psi}: ONRefrigerant pressure sensor
ECT (Engine coolant temperature)°C°FIndicate the ECTECT sensor2AH
VECT 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. 1Perform applicable DTC troubleshooting.2Z 2AC 2AD
EQ_RAT11_DSD (Desired equivalence ratio (lambda))Idling after warm-up: approx. 1Perform applicable DTC troubleshooting.
ETC_ACT (Electronic throttle control actual)°Indicate the desired TP by anglePerform applicable DTC troubleshooting.2BE, 2BF
ETC_DSD (Electronic throttle control desired)%Indicate the desired TP by percentTP 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/ONSimulation item (EVAPCV) is ON: ONCV solenoid valve1M
FAN_DUTY (Fan control module)%When all of following condition are met: 50% Test mode ON WOTFan control module1R
FCL (Fuel cap warning light)OFF/ONFuel cap warning light not illuminated: OFF Fuel cap warning light illuminated: ONPerform 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/ONTurn the ignition switch to the ON position: OFF Idle: ON Cranking: ONFuel pump relay Inspect following PIDs: RPM.1BG
FTP (Fuel tank pressure sensor)KPa, psi, BarIndicate the fuel tank pressureFuel tank pressure sensor1AH
VFuel tank pressure is equal to barometric pressure: approx. 2.6 V
FUELPW (Fuel injector duration)SecIdle (after warm up): approx. 2.2 msFuel 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-DriveIdle (after warm up): CLFuel injector Inspect following PIDs: IAT, MAF, TP REL, MAP, ECT, RPM, O2S11, O2S12, INGEAR, VPWR, ALTT V.
HTR11 (A/F sensor heater)OFF/ONIdle (after warm up): ON<=>OFFA/F sensor Inspect following PIDs: IAT, MAF, TP REL, ECT, RPM.2A
HTR12 (HO2S heater)OFF/ONIdle (after warm up): ON<=>OFFHO2S heater Inspect following PIDs: IAT, MAF, ECT, RPM.2B
IAT (Intake air temperature)°C°FIndicate the IATIAT sensor1AC
VIAT 20°C {68°F}: approx. 2.38 V IAT 60°C {140°F}: approx. 0.89 V
IMRC (Variable tumble solenoid valve)OFF/ONECT below 60°C {140°F} and engine speed below 3,750 RPM : On ECT above 60°C {140°F} while idling.: OffVariable tumble solenoid valve Inspect following PIDs: TP REL, ECT, RPM.21
IMRC_POS (Variable tumble shutter valve switch)VECT 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 VVariable tumble shutter valve switch2R
IMTV (Variable Intake air control solenoid valve)OFF/ONEngine speed is below approx. 4,400 RPM: On Others: OffVariable intake air control solenoid valve Inspect following PIDs: RPM.2J
INGEAR (Load/no load condition)OFF/ONDriving range: On Except above: OffTR switch
IVS (CTP condition)Idle/Off_IdleCTP: Idle Others: Off IdlePerform applicable DTC troubleshooting.
KNOCKR (Knocking retard)°Turn the ignition switch to the ON position: 0° Idle: 0°KS2U 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/secIndicate the MAFMAF sensor1AK
VTurn 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, BarIndicate the MAPMAP sensor2AG
VTurn the ignition switch to the ON position (at sea level): approx. 4.1 V Idle: approx. 1.2 V
MIL (Malfunction indicator lamp)OFF/ONDTC stored: On DTC not stored: OffPerform applicable DTC troubleshooting.
MIL_DIS (Travelled distance since the MIL illuminated)KmMilesIndicate the travelled distance since the MIL illuminated
O2S11 (A/F sensor)AIdle (After warm up): approx. 0 mAA/F sensor2Z 2AC 2AD
O2S12 (HO2S)VIdle (After warm up): 0-1.0 VHO2S2Q
RO2FT1 (HO2S fuel trim)%Idle (after warm up): approx. -0.03-0.03Perform applicable DTC troubleshooting.
RPM (Engine speed)RPMIndicate the engine speedCKP sensor2W
SC_CANCEL (2) (CANCEL switch)Inactive/ActiveCANCEL switch pressed in: Active Except above: InactiveCruise control switch1AQ
SC_OFF (2) (ON/OFF switch)Inactive/ActiveON/OFF switch pressed in (OFF): Active Except above: InactiveCruise control switch1AQ
SC ON (2) (ON/OFF switch)Inactive/ActiveON/OFF switch pressed in (ON): Active Except above: InactiveCruise control switch1AQ
SC_RES (2) (RESUME switch)Inactive/ActiveRESUME switch pressed in: Active Except above: InactiveCruise control switch1AQ
SC_SET (2) (SET(-) switch)Inactive/ActiveSET(-) switch pressed in: Active Except above: InactiveCruise control switch1AQ
SC_SET (2) (SET(+) switch)Inactive/ActiveSET(+) switch pressed in: Active Except above: InactiveCruise control switch1AQ
SCCS (2) (Cruise control switch)VOFF 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 VCruise control switch1AQ
SEGRP (EGR valve (stepping motor) position)Turn the ignition switch to the ON position: 0 Idle: 0 step Cranking: 0-52EGR 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 positionInspect 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 timingIgnition coil Inspect following PIDs: MAF, TP REL, ECT, RPM, INGEAR, VPWR.2G, 2H, 2K, 2L
TEST (Test mode)OFF/ONTest 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 finishedThermostat
°C°FIndicates 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 executionThermostat
°c°FIndicates 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 executionThermostat
°c°FIndicates 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 sensor2AK 2AL
TP1 (TP sensor No. 1)%Accelerator pedal released: approx. 12% Accelerator pedal depressed: approx. 84%TP sensor No. 12AK
VAccelerator 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. 22AL
VAccelerator pedal released: approx. 4.4 V Accelerator pedal depressed: approx. 0.8 V
TPCT (TP sensor voltage at CTP)VTurn the ignition switch to the ON position: approx. 0.5 VTP sensor2AK 2AL
VPWR (Battery positive voltage)VTurn the ignition switch to the ON position: B+Battery1C
VSS (Vehicle speed)KPHIndicate the vehicle speedPerform applicable DTC troubleshooting.
VT ACT1 (Actual valve timing)°Idle: approx. 0° Racing after warm up: 0-25°CMP sensor2S
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
(1)Calculated value; differs from terminal voltage
(2)With cruise control system

PID/DATA MONITOR CHART

  1. Following PIDs are for the ATX models. If inspects for following PIDs, (See «ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [FS5A-EL]»(ref-375402-S21806660812010102800000) .)

Without Using the M-MDS

CAUTIONThe PCM terminal voltages vary with change in measuring conditions and vehicle conditions. Always carry out a total inspection of the input systems, output systems, and PCM to determine the cause of trouble. Otherwise, a wrong diagnosis will be made.

PCM CONFIGURATION [L5]

Note. Use the IDS (laptop PC) because the PDS (Pocket PC) does not support the PCM CONFIGURATION.

  1. Connect the M-MDS to the DLC-2.
  2. After the vehicle is identified, select the following items from the initial screen of the M-MDS. When using the IDS (laptop PC) Select the "Module Programming".
  3. Then, select items from the screen menu in the following order. Select "Programmable Module Installation". Select "PCM".
  4. Perform the configuration according to the directions on the screen.
  5. Retrieve DTCs by the M-MDS, then verify that there is no DTC present. If a DTC(s) is detected, perform the applicable DTC inspection. (See «DTC TABLE [L5]»(ref-375346-S28771957642010102800000) .)