Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 445 (ENGINE CONTROL SYSTEM)PCM INSPECTIONUSING THE WDS OR EQUIVALENT
1999 Mazda 626 ES, 2.5 D, Standard
Using the WDS or Equivalent
1999 Mazda 626 ES, 2.5 D, StandardSECTION Using the WDS or Equivalent
WARNING: This page is about a different car, the 2005 Mazda RX-8 and 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- PIDs for the following parts are not available on this model. Go to the appropriate part inspection page.
- Main relay (See RELAY INSPECTION .)
- Connect the WDS or equivalent to the DLC-2.
- Turn the ignition switch to ON position.
- 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 |
|
|
5AA | |||||||||
| ACSW (A/C switch) | On/Off |
|
|
4W | |||||||||
| AIP RLY (AIR pump relay) | On/Off |
|
|
4O | |||||||||
| ALTF (Generator field coil control duty value) | % |
|
|
2I | |||||||||
| ALTT V (Generator output voltage) | V |
|
Generator. | 2T | |||||||||
| APP (Accelerator pedal position) | % |
|
|
- | |||||||||
| APP1 (Accelerator pedal position) | % |
|
APP sensor | 5F | |||||||||
| V |
|
||||||||||||
| APP2 (Accelerator pedal position) | % |
|
APP sensor | 5C | |||||||||
| V |
|
||||||||||||
| APV (APV motor) | Opening/Closing |
|
|
3G, 3J | |||||||||
| APV_POS (APV position sensor) | V |
|
|
3B | |||||||||
| ARPMDES (Target engine speed) | RPM | MT
AT
|
|
- | |||||||||
| B+ (Battery positive voltage) | V |
|
|
5J | |||||||||
| BARO (Barometric pressure) | kPa, Bar, psi |
|
|
5S | |||||||||
| V |
|
||||||||||||
| BOO (Brake switch) | On/Off |
|
|
4P | |||||||||
| CATT11_DSD (Estimated catalytic converter temperature) | °C | °F |
|
|
- | ||||||||
| CHRGLP (Generator warning light) | On/Off |
|
|
- | |||||||||
| COLP (Refrigerant pressure switch (middle)) | ON/OFF |
|
4Z | ||||||||||
| CPP (Clutch pedal position) | On/Off |
|
|
4F | |||||||||
| CPP/PNP (Shift lever position) | Drive/Neutral |
|
|
2O | |||||||||
| DEI (VDI solenoid valve) | On/Off |
|
|
1W | |||||||||
| DTC_CNT (Number of DTC detected) | - | - | - | - | |||||||||
| ECT (Engine coolant temperature) | °C | °F |
|
|
2K | ||||||||
| V |
|
||||||||||||
| ECT_DES (Estimated ECT) | °C | °F |
|
|
- | ||||||||
| EQ_RAT11 (Front oxygen sensor) | - |
|
|
2B, 2C | |||||||||
| ETC_ACT (Electronic throttle control actual) | ° |
|
|
- | |||||||||
| ETC_DSD (Electronic throttle control desired) | ° |
|
|
- | |||||||||
| % |
|
||||||||||||
| EVAPCP (Purge solenoid valve duty value) | % |
|
|
2P | |||||||||
| FAN1 (Cooling fan control) | On/Off |
|
|
5X | |||||||||
| FAN2 (Cooling fan control) | On/Off |
|
|
5AD | |||||||||
| FLI (Fuel level) | % |
|
|
- | |||||||||
| FP (Fuel pump relay) | On/Off |
|
|
5P | |||||||||
| FPRR (Fuel pump speed control relay) | On/Off |
|
|
4M | |||||||||
| FUELPW (Fuel injector duration) | ms |
|
|
2J, 2M | |||||||||
| FUELSYS (Fuel system status) | OL/CL/OL Drive/OL Fault/CL Fault |
|
|
- | |||||||||
| GENVDSD (Generator voltage desired) | V |
|
|
- | |||||||||
| HTR11 (Front HO2S heater) | On/Off |
|
|
1V | |||||||||
| HTR12 (Rear HO2S heater) | On/Off |
|
|
2A | |||||||||
| IAC (Idle air control) | % |
|
|
1B, 1C | |||||||||
| IASV (VFAD solenoid valve) | On/Off |
|
|
5Z | |||||||||
| IAT (Intake air temperature) | °C | °F |
|
|
5K | ||||||||
| V |
|
||||||||||||
| INGEAR (In gear) | On/Off | MT
AT
|
|
- | |||||||||
| IVS (CTP condition) | Idle/Off Idle |
|
|
- | |||||||||
| KNOCKR (Knocking retard) | ° |
|
|
1T | |||||||||
| LDP_MON (EVAP System leak detection pump monitoring current) | mA |
|
4D | ||||||||||
| LDP_REF(EVAP System leak detection pump reference current) | mA |
|
4D | ||||||||||
| LDF_IDL (EVAP System leak detection pump idle current) | mA |
|
4D | ||||||||||
| LDP_SLDV (EVAP Control system small leak detection value) | mA |
|
4D | ||||||||||
| LDP_VSLDV (EVAP Control system very small leak detection value) | mA |
|
4D | ||||||||||
| LDP_EVAPCP (EVAP Control system incorrect purge flow detection value) | mA |
|
4D | ||||||||||
| LOAD (Engine load) | % | MT
AT
|
|
- | |||||||||
| LONGFT1 (long term fuel trim) | % |
|
|
- | |||||||||
| MAF (Mass airflow) | g/s | MT
AT
|
|
5N | |||||||||
| V | MT
AT
|
||||||||||||
| MIL (Malfunction indicator lamp) | On/Off |
|
|
- | |||||||||
| MIL_DIS (Travelled distance since the MIL illuminated) | Indicates travelled distance since the MIL illuminated | ||||||||||||
| MOP_POS (Metering oil pump) | - |
|
|
2V, 2W, 2Y, 2AB | |||||||||
| MOP_SW (Metering oil pump switch) | On/Off |
|
|
2N | |||||||||
| O2S11 (Front oxygen sensor) | mA |
|
|
2B | |||||||||
| O2S12 (Rear oxygen sensor) | V |
|
|
2Q | |||||||||
| PSCNTV (AIR solenoid valve control) | On/Off |
|
|
1O | |||||||||
| PCM_T (PCM temperature sensor) | V |
|
|
- | |||||||||
| RO2FT1 (Rear oxygen sensor fuel trim) | - |
|
|
- | |||||||||
| RPM (Engine speed) | RPM |
|
|
- | |||||||||
| SC_SET (Cruise set indicator light) | On/Off |
|
|
- | |||||||||
| SCCS (Cruise control switch) | V |
|
|
5V | |||||||||
| SELTESTDTC (DTC) | Indicates Number of the DTCs detected by the KOEO/KOER self-test function | ||||||||||||
| SHRTFT1 (Short term fuel trim (front)) | % |
|
|
- | |||||||||
| SHRTFT12 (Short term fuel trim (rear)) | % |
|
|
- | |||||||||
| SPARK-L (Ignition timing) | °(BTDC) |
|
|
2AA | |||||||||
| SPARK-T (Ignition timing) | °(BTDC) |
|
|
2AD | |||||||||
| SSV (SSV solenoid valve) | On/Off |
|
|
1L | |||||||||
| test | On/Off |
|
- | - | |||||||||
| TIRE SIZE (Tire revolution per mile) | rev/mile |
|
|||||||||||
| TP (TP) | V |
|
|
- | |||||||||
| TP_REL (Relative TP) | % |
|
|
- | |||||||||
| TP1 (TP sensor 1) | % |
|
|
1J | |||||||||
| V |
|
||||||||||||
| TP2 (TP sensor 2) | % |
|
|
1M | |||||||||
| V |
|
||||||||||||
| TPCT (TP sensor voltage at CTP) | V |
|
|
1J, 1M | |||||||||
| VSS (Vehicle speed) | km/h | MPH |
|
|
- | ||||||||
|
|||||||||||||
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.