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Home >> Mazda >> 2004 >> RX-8 1.3 3 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Pcm Inspection >> Using the WDS or Equivalent
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Using the WDS or Equivalent

NOTE:
  • PIDs for the following parts are not available on this model. Go to the appropriate part inspection page.
  1. Connect the WDS or equivalent to the DLC-2.
  2. Turn the ignition switch to 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, AIP RLY, ALTF, APV, ARPMDES, DEI, ETC_DSD, EVAPCP, FAN1, FAN2, FP, FPRR, FUELPW, GENVDSD, HTR11, HTR12, IASV, MOP POS, PACNTV, PREDELI, SSV, test
PID/DATA MONITOR

Monitor item (Definition) Unit/Condition Condition/Specification (Reference) Inspection item(s) PCM terminal
ACCS (A/C relay) On/Off
  • IG SW ON: Off
  • A/C switch ON and fan switch ON at idling: On
  • The following PIDs
    • ACSW, ECT, IVS, PCM_T, RPM, TP, VSS
  • A/C relay
 5AA
ACSW (A/C switch) On/Off
  • A/C switch and fan switch ON at ignition switch ON: On
  • A/C switch OFF at ignition switch ON: Off
  • A/C switch
 4W
AIP RLY (AIR pump relay) On/Off
  • During the specified period after cold: On
  • Idling after warm-up: Off
  • The following PIDs
    • CATT11_DSD, ECT, IAT
  • AIR pump relay
 4O
ALTF (Generator field coil control duty value) %
  • IG SW ON:0%
  • Just after A/C switch ON and fan switch ON at idling: Duty value rises
  • The following PIDs
    • ALTT V, B+, ECT, IAT, IVS, PCM_T, RPM, VSS
 2I
ALTT V (Generator output voltage) V
  • IG SW ON: 0 V
  • Idling: Approx. 14.9 V(1) (E/L not operating)
 Generator. 2T
APP (Accelerator pedal position) %
  • Accelerator pedal released: 0%
  • Accelerator pedal depressed: 100%
  • The following PIDs
    • APP1, APP2
  • APP sensor
 -
APP1 (Accelerator pedal position) %
  • Accelerator pedal released: 31.1-33.1%
  • Accelerator pedal depressed: 75.6-78.6%
 APP sensor 5F
V
  • Accelerator pedal released: 1.555-1.655 V
  • Accelerator pedal depressed: 3.78-3.93 V
APP2 (Accelerator pedal position) %
  • Accelerator pedal released: 20.1-22.1%
  • Accelerator pedal depressed: 64.6-67.6%
 APP sensor 5C
V
  • Accelerator pedal released: 1.005-1.105 V
  • Accelerator pedal depressed: 3.23-3.38 V
APV (APV motor) Opening/Closing
  • High engine speed after warm-up: Opening
  • Except above: Closing
  • The following PIDs
    • APV_POS, BARO, ECT, IAT, MAF, RPM, TP
  • APV motor
 3G, 3J
APV_POS (APV position sensor) V
  • High engine speed after warm-up: 1.5 V or less
  • Except above: 1.5 V or more
  • APV position sensor
 3B
ARPMDES (Target engine speed) RPM MT 
  • No load after warm-up: 750-850 rpm

AT 
  • No load after warm-up: 760-860 rpm
  • The following PIDs
    • ACCS, ALTT V, B+, COLP, ECT, IAT, MAF, RPM, TP
 -
B+ (Battery positive voltage) V
  • IG SW ON: B+
  • Battery
 5J
BARO (Barometric pressure) kPa, Bar, psi
  • IG SW ON: Indicates atmospheric pressure
  • BARO sensor
 5S
V
  • IG SW ON
    • Altitude 0 m {0 ft}: 3.8-4.2 V(4)
    • Altitude 305 m {1,000 ft}: 3.6-4.0 V(4)
    • Altitude 610 m {2,000 ft}: 3.5-3.9 V(4)
    • Altitude 914 m {3,000 ft}: 3.4-3.7 V(4)
    • Altitude 1,219 m {4,000 ft}: 3.2-3.6 V(4)
    • Altitude 1,524 m {5,000 ft}: 3.1-3.5 V(4)
    • Altitude 1,829 m {6,000 ft}: 3.0-3.4 V(4)
    • Altitude 2,134 m {7,000 ft}: 2.9-3.3 V(4)
BOO (Brake switch) On/Off
  • Brake pedal depressed: On
  • Brake pedal released: Off
  • Brake switch
 4P
CATT11_DSD (Estimated catalytic converter temperature) °C °F
  • Idling after warm-up: Approx. 531 °C {988 °F}
  • The following PIDs
    • ECT, IAT, LOAD, RPM
 -
CHRGLP (Generator warning light) On/Off
  • IG SW ON: On
  • Idling: Off
  • Generator warning light
 -
COLP (Refrigerant pressure switch (middle)) ON/OFF
  • Refrigerant pressure switch (middle) ON (2) at idling: ON
  • Refrigerant pressure switch (middle) OFF(3) at idling: OFF
  • Refrigerant pressure switch
 4Z
CPP (Clutch pedal position) On/Off
  • Clutch pedal depressed: On
  • Clutch pedal released: Off
  • CPP switch
 4F
CPP/PNP (Shift lever position) Drive/Neutral
  • Neutral position: Neutral
  • Except above: Drive
  • Neutral switch
 2O
DEI (VDI solenoid valve) On/Off
  • Idling: Off
  • High engine speed after warm-up: On
  • The following PID
    • RPM
  • VDI solenoid valve
 1W
DTC_CNT (Number of DTC detected) - - - -
ECT (Engine coolant temperature) °C °F
  • IG SW ON position: Indicates ECT
  • ECT sensor
 2K
V
  • ECT 20 °C {68 °F}: approx. 3.1 V
  • ECT 80 °C {176 °F}: approx. 0.9 V
ECT_DES (Estimated ECT) °C °F
  • IG SW ON position: Indicates estimated ECT
  • The following PIDs
    • ECT, IAT, LOAD, MAF, VSS
 -
EQ_RAT11 (Front oxygen sensor) -
  • Idling after warm-up: Approx. 1
  • Front HO2S
 2B, 2C
ETC_ACT (Electronic throttle control actual) °
  • CTP: Approx. 6.3°
  • WOT: Approx. 83°
  • The following PIDs
    • TP1, TP2
 -
ETC_DSD (Electronic throttle control desired) °
  • CTP: Approx. 6.3°
  • WOT: Approx. 83°
  • The following PIDs
    • APR, ECT_DES
 -
%
  • CTP: Approx. 7%
  • WOT: Approx. 100%
EVAPCP (Purge solenoid valve duty value) %
  • IG SW ON: 0%
  • Increase the engine speed: Duty value rises
  • The following PIDs
    • BARO, ECT, FUELSYS, IAT, LOAD, MAF, RPM
  • Purge solenoid valve
 2P
FAN1 (Cooling fan control) On/Off
  • The cooling fan is operating: On
  • Except above: Off
  • The following PIDs
    • ACSW, COLP, ECT, IAT, PCM_T
  • Cooling fan relay No.1
 5X
FAN2 (Cooling fan control) On/Off
  • The cooling fan is operating at high speed: On
  • Except above: Off
  • The following PIDs
    • ACSW, COLP, ECT, IAT, PCM_T
  • Cooling fan relay No.2
 5AD
FLI (Fuel level) %
  • Fuel gauge level F: Approx. 100%
  • Fuel gauge level E: Approx. 0%
  • Fuel tank gauge unit
 -
FP (Fuel pump relay) On/Off
  • IG SW ON: Off
  • Idling: On
  • Cranking: On
  • The following PID
    • RPM
  • Fuel pump relay
 5P
FPRR (Fuel pump speed control relay) On/Off
  • IG SW ON: Off
  • Idling: Off
  • Cranking: On
  • The following PIDs
    • B+, BARO, ECT, IAT, MAF, O2S11, O2S12, RPM, TP
  • Fuel pump speed control relay
 4M
FUELPW (Fuel injector duration) ms
  • Cranking (before warm-up [ECT: 20 °C {68 °F}]): approx. 48 ms
  • Cranking after warm-up: approx. 9.6 ms
  • Idling after warm-up: 2.9-3.5 ms
  • The following PIDs
    • ACSW, APP, B+, BARO, ECT, IAT, KNOCKR, MAF, O2S11, O2S12, RPM, TP, VSS
  • Fuel injector
 2J, 2M
FUELSYS (Fuel system status) OL/CL/OL Drive/OL Fault/CL Fault
  • Idling after warm-up: CL
  • The following PIDs
    • ACSW, APP, B+, BARO, ECT, IAT, KNOCKR, MAF, O2S11, O2S12, RPM, TP, VSS
 -
GENVDSD (Generator voltage desired) V
  • IG SW ON: 0 V
  • Idling: Approx. 14.9 V(1) (E/L not operating)
  • The following PIDs
    • ACSW, ALTT, V, B+, BOO, ECT, IAT, PCM_T, RPM, VSS
 -
HTR11 (Front HO2S heater) On/Off
  • Idling after warm-up: On
  • The following PIDs
    • B+, ECT, IAT, LOAD, MAF
  • Front HO2S heater
 1V
HTR12 (Rear HO2S heater) On/Off
  • Idling after warm-up: On
  • The following PIDs
    • B+, ECT, IAT, LOAD, MAF
  • Rear HO2S heater
 2A
IAC (Idle air control) %
  • IG SW ON: Approx. 26%
  • Idling after warm-up: Approx. 21%
  • The following PIDs
    • ACSW, ALTT V, APP, ARPMDES, COLP, ECT, EVAPCP, RPM, VSS
  • Throttle valve actuator
 1B, 1C
IASV (VFAD solenoid valve) On/Off
  • High engine speed: On
  • Idling: Off
  • The following PID
    • RPM
  • VFAD solenoid valve
 5Z
IAT (Intake air temperature) °C °F
  • IG SW ON position: Indicates IAT
  • IAT sensor
 5K
V
  • IAT 20 °C {68 °F}: Approx. 2.4 V
  • IAT 40 °C {104 °F}: Approx. 1.5 V
INGEAR (In gear) On/Off MT 
  • When the following conditions are satisfied: On
    • Engine runs
    • Not neutral
    • Clutch pedal released
  • Except above: Off

AT 
  • When the following conditions are satisfied: On
    • Engine runs
    • Driving range
  • Except above: Off
  • The following PIDs
    • CPP, CPP/PNP, RPM
 -
IVS (CTP condition) Idle/Off Idle
  • CTP: Idle
  • Except above: Off idle
  • The following PID
    • APP
 -
KNOCKR (Knocking retard) °
  • IG SW ON: 0°
  • Idling: 0°
  • KS
 1T
LDP_MON (EVAP System leak detection pump monitoring current) mA
  • Indicates EVAP System leak detection pump monitoring current
 4D
LDP_REF(EVAP System leak detection pump reference current) mA
  • Indicates EVAP System leak detection pump reference current
 4D
LDF_IDL (EVAP System leak detection pump idle current) mA
  • Indicates EVAP System leak detection pump idle current
 4D
LDP_SLDV (EVAP Control system small leak detection value) mA
  • Indicates EVAP Control system small leak detection value
 4D
LDP_VSLDV (EVAP Control system very small leak detection value) mA
  • Indicates EVAP Control system very small leak detection value
 4D
LDP_EVAPCP (EVAP Control system incorrect purge flow detection value) mA
  • Indicates EVAP Control system incorrect purge flow detection value
 4D
LOAD (Engine load) % MT 
  • Idling: 18.0-25.0%
  • Engine speed 2,500 rpm (no load): 13.5-19.5%

AT 
  • Idling: 20.0-28.0%
  • Engine speed 2,500 rpm (no load): 15.0-21.0%
  • The following PIDs
    • BARO, IAT, MAF, RPM
 -
LONGFT1 (long term fuel trim) %
  • Idling after warm-up: approx-12.5-12.5%
  • The following PIDs
    • ECT, LOAD, MAF, RPM, SHRTFT
 -
MAF (Mass airflow) g/s MT 
  • Idling after warm-up: 3.8-4.7 g/s
  • Engine speed 2,500 rpm (no load): 8.7-11.7 g/s

AT 
  • Idling after warm-up: 4.4-5.3 g/s
  • Engine speed 2,500 rpm (no load): 9.5-12.5 g/s
  • MAF sensor
 5N
V MT 
  • Idling after warm-up: 1.16-1.23 V
  • Engine speed 2,500 rpm (no load): 1.49-1.64 V

AT 
  • Idling after warm-up: 1.21-1.29 V
  • Engine speed 2,500 rpm (no load): 1.54-1.67 V
MIL (Malfunction indicator lamp) On/Off
  • IG SW ON: On
  • Idling: Off
  • MIL
 -
MIL_DIS (Travelled distance since the MIL illuminated) Indicates travelled distance since the MIL illuminated
MOP_POS (Metering oil pump) -
  • When the initial set function is operating: value is increased
  • The following PIDs
    • BARO, ECT, IAT, MOP_SW, RPM
  • Metering oil pump
 2V, 2W, 2Y, 2AB
MOP_SW (Metering oil pump switch) On/Off
  • When the initial set function is operating: On
  • Metering oil pump switch
 2N
O2S11 (Front oxygen sensor) mA
  • Idling after warm-up: Approx. 0 mA
  • Front HO2S
 2B
O2S12 (Rear oxygen sensor) V
  • Idling after warm-up: 0.1-0.9 V
  • Rear HO2S
 2Q
PSCNTV (AIR solenoid valve control) On/Off
  • AIR pump operating: On
  • AIR pump not operating: Off
  • The following PIDs
    • CATT11_DSD, ECT, IAT
  • AIR solenoid valve
 1O
PCM_T (PCM temperature sensor) V
  • IG SW ON position: Indicates PCM temperature sensor output voltage
  • PCM
 -
RO2FT1 (Rear oxygen sensor fuel trim) -
  • Idling after warm-up: approx.-0.03-0.03
  • The following PID
    • O2S12
 -
RPM (Engine speed) RPM
  • Engine runs: Indicates engine speed
  • Eccentric shaft position sensor
 -
SC_SET (Cruise set indicator light) On/Off
  • Cruise set indicator light ON: On
  • Cruise set indicator light OFF: Off
  • Cruise indicator light
 -
SCCS (Cruise control switch) V
  • Press ON/OFF: approx. 0 V
  • Press CANCEL: approx. 0.25 V
  • Press SET/COAST: approx. 1.18 V
  • Press RES/ACCEL: approx. 2.50 V
  • Others: approx. 5.0 V
  • Cruise control switch
 5V
SELTESTDTC (DTC) Indicates Number of the DTCs detected by the KOEO/KOER self-test function
SHRTFT1 (Short term fuel trim (front)) %
  • Idling after warm-up: approx.-4-4%
  • The following PIDs
    • ACSW, APP, B+, BARO, ECT, IAT, KNOCKR, LOAD, MAF, O2S11, O2S12, RPM, TP, VSS
 -
SHRTFT12 (Short term fuel trim (rear)) %
  • Idling after warm-up: approx. 99%
  • The following PIDs
    • ACSW, APP, B+, BARO, ECT, IAT, KNOCKR, LOAD, MAF, O2S11, O2S12, RPM, TP, VSS
 -
SPARK-L (Ignition timing) °(BTDC)
  • Idling after warm-up: BTDC approx. -5°
  • The following PIDs
    • ACSW, APP, ECT, IAT, IVS, KNOCKR, LOAD, MAF, RPM, TP, VSS
  • Ignition coil (L/F)
 2AA
SPARK-T (Ignition timing) °(BTDC)
  • Idling after warm-up: BTDC approx. -5°
  • The following PIDs
    • ACSW, APP, ECT, IAT, IVS, KNOCKR, LOAD, MAF, RPM, TP, VSS
  • Ignition coil (T/F)
 2AD
SSV (SSV solenoid valve) On/Off
  • High engine speed and high load after warm-up: On
  • Idling: Off
  • The following PIDs
    • BARO, ECT, IAT, MAF, RPM, TP
  • SSV solenoid valve
 1L
test On/Off
  • Test mode: On
  • Except above: Off
 - -
TIRE SIZE (Tire revolution per mile) rev/mile
  • Indicates tire revolution per a mile
TP (TP) V
  • CTP: Approx. 0.8 V
  • WOT: Approx. 3.92 V
  • The following PIDs
    • TP1, TP2
 -
TP_REL (Relative TP) %
  • CTP: Approx. 7%
  • WOT: Approx. 100%
  • The following PIDs
    • TP, TP1, TP2
 -
TP1 (TP sensor 1) %
  • CTP: 8.0-16.0%
  • WOT: 76.5-81.9%
  • TP sensor No.1
 1J
V
  • CTP: 0.40-0.80 V
  • WOT: 3.825-4.095 V
TP2 (TP sensor 2) %
  • CTP: 23.6-35.6%
  • WOT: 80.66-86.06%
  • TP sensor No.2
 1M
V
  • CTP: 1.18-1.78 V
  • WOT: 4.033-4.303 V
TPCT (TP sensor voltage at CTP) V
  • IG SW ON (CTP): 0.01 V
  • TP sensor
 1J, 1M
VSS (Vehicle speed) km/h MPH
  • Vehicle running: Indicates vehicle speed
  • ABS HU/CM
  • DSC HU/CM
 -
(1) Calculated value; differs from terminal voltage
(2) Refrigerant pressure switch (middle) turns off when the refrigerant pressure is 1.11 MPa {11.3 kgf/cm2 , 161 psi} or less
(3) Refrigerant pressure switch (middle) turns on when the refrigerant pressure is 1.60 MPa {16.3 kgf/cm2 , 232 psi} or more
(4) The voltage may vary excessively depending on the weather or battery conditions.
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