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 MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 332 (SYMPTOM TROUBLESHOOTING (ENGINE CONTROL SYSTEM L3))ENGINE CONTROL SYSTEM OPERATION INSPECTIONFUEL CUT CONTROL SYSTEM INSPECTION

2008 Mazda 6 s Sport, 4D Hatchback, Standard

Fuel Cut Control System Inspection

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Fuel Cut Control System Inspection

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Warm up engine and idle it.
Turn off the electrical loads and A/C switch.
Connect WDS or equivalent to the DLC-2.
Select RPM PID.
Listen for the fuel injector operation sound at all cylinders using the soundscope and monitor both PIDs while performing the following steps:
1. Depress the accelerator pedal and increase the engine speed to 4, 000 rpm.
2. Quickly release the accelerator pedal (brake pedal is not depressed) and verify that the fuel injector operation sound stops, and starts again when the engine speed drops below 1, 200 rpm.
  - If not as specified, inspect the following:
    - ECT sensor and related harness
      (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION .)
    - Neutral/clutch pedal position switch and related harness (MTX)
      (See CLUTCH PEDAL POSITION (CPP) SWITCH INSPECTION .)
    - TR switch and related harness (ATX)
      (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FN4A-EL] .)

RENDER: 1.0x

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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.