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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 194 (ENGINE CONTROL SYSTEM)
1999 Mazda 626 ES, 2.5 D, Standard
Section 194 (Engine Control System)
1999 Mazda 626 ES, 2.5 D, StandardSECTION Section 194 (Engine Control System)
WARNING: This page is about a different car, the 2004 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
- Control System Component Location Index
- Control System Diagram
- Control System Wiring Diagram
- Pcm Removal/Installation
- Pcm Inspection
- Notes
- PCM Inspection Using the SST (104 Pin Breakout Box)
- Inspection Using An Oscilloscope (Reference)
- Vehicle speed signal
- Engine speed signal (output)
- HO2S signal (front, RH/LH)
- SGC signal
- IAC control signal
- Fuel injection signal
- IGT signal
- NE signal
- Purge control signal
- Generator output voltage signal
- Generator field coil signal
- Torque reduction request signal
- Torque reduction inhibit signal
- Cooling fan control signal
- Water temperature gauge control signal
- PCM Inspection Using the SST (WDS or equivalent)
- Freeze Frame Data Monitor Table
- Mass Airflow (MAF)/Intake Air Temperature (IAT) Sensor Inspection
- Throttle Position (TP) Sensor Inspection
- Throttle Position (TP) Sensor Removal/Installation
- Engine Coolant Temperature (ECT) Sensor Inspection
- Engine Coolant Temperature (ECT) Sensor Removal/Installation
- Crankshaft Position (CKP) Sensor Inspection
- Crankshaft Position (CKP) Sensor Removal/Installation
- Camshaft Position (CMP) Sensor Inspection
- Camshaft Position (CMP) Sensor Removal/Installation
- Knock Sensor Inspection
- Knock Sensor Removal/Installation
- Heated Oxygen Sensor (Ho2S) Inspection
- EGR Boost Sensor Inspection
- Power Steering Pressure (PSP) Switch Inspection
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.