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 392 (SYMPTOM TROUBLESHOOTING (ENGINE CONTROL SYSTEM) AJ)
1999 Mazda 626 ES, 2.5 D, Standard
Section 392 (Symptom Troubleshooting (Engine Control System) AJ)
1999 Mazda 626 ES, 2.5 D, StandardSECTION Section 392 (Symptom Troubleshooting (Engine Control System) AJ)
WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
- Control System Device And Control Relationship Chart
- Foreword
- Intermittent Concern Troubleshooting
- Symptom Diagnostic Index
- Symptom Quick Diagnosis Chart
- No.1 Melting Of Main Or Other Fuses
- No.2 Mil Comes On
- No.3 Will Not Crank
- No.4 Hard Start/Long Crank/Erratic Start/Erratic Crank
- No.5 Engine Stalls-After Start/At Idle
- No.6 Cranks Normally But Will Not Start
- No. 7 Slow Return To Idle
- No.8 Engine Runs Rough/Rolling Idle
- No.9 Fast Idle/Runs On
- No.10 Low Idle/Stalls During Deceleration
- No.11 Engine Stalls/Quits, Engine Runs Rough, Misses, Buck/Jerk, Hesitation/Stumble, Surges
- No.12 Lack/Loss Of Power-Acceleration/Cruise
- No.13 Knocking/Pinging-Acceleration/Cruise
- No.14 Poor Fuel Economy
- No.15 Emission Compliance
- No.16 High Oil Consumption/Leakage
- No.17 Cooling System Concerns-Overheating
- No.18 Cooling System Concerns-Runs Cold
- No.19 Exhaust Smoke
- No.20 Fuel Odor (In Engine Compartment)
- No.21 Engine Noise
- No.22 Vibration Concerns (Engine)
- No.23 A/C Does Not Work Sufficiently
- No.24 A/C Always On/A/C Compressor Runs Continuously
- No.25 A/C Does Not Cut Off Under Wide Open Throttle Conditions
- No.26 Exhaust Sulphur Smell
- No.27 Fuel Refill Concerns
- No.28 Fuel Filling Shut Off Issues
- No.29 Constant Voltage
- No.30 Spark Plug Condition
- Engine Control System Operation Inspection
- Input Signal System Investigation Procedure
- Intake Manifold Vacuum Inspection
- Idle Air Control Inspection
- Intake Manifold Communication Control (IMCC) System Inspection
- Fuel Injector Operation Inspection
- Ignition Timing Control Inspection
- Fuel Cut Control System Inspection
- Fuel Pump Operation Inspection
- Fuel Pump Control System Inspection
- EGR Control System Inspection
- Purge Control System Inspection
- A/C Cut-off Control System Inspection
- Spark Test
- Evaporative Emission (EVAP) System Leak 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.