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 600 (SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM L3 WITH TC))ENGINE CONTROL SYSTEM OPERATION INSPECTIONELECTRONIC THROTTLE CONTROL SYSTEM INSPECTIONLOAD COMPENSATION INSPECTION

2008 Mazda 6 s Sport, 4D Hatchback, Standard

Load compensation inspection

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Load compensation inspection

WARNING: This page is about a different car, the 2007 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Start the engine and run it is idling.
Connect the M-MDS to the DLC-2.
Verify that DTC P0506 or P0507 is not displayed.
- If DTC P0506, or P0507 is displayed, perform the DTC inspection.
  (See DTC TABLE ).
Select the RPM PID.
NOTE:
- Excludes temporary idle speed drop just after the loads are turned on.

Verify that the engine speed is within the specification under each load condition.

If the load condition is not as specified, inspect the following:
- A/C switch and related wiring harness
  (See CLIMATE CONTROL UNIT INSPECTION [L3 WITH TC] ).
- Fan switch and related wiring harness
  (See CLIMATE CONTROL UNIT INSPECTION [L3 WITH TC] ).
- PSP switch and related wiring harness
  (See POWER STEERING PRESSURE (PSP) SWITCH INSPECTION ).

Engine speed

ENGINE SPEED REFERENCE CHART

Load condition

Engine speed (RPM)⁽¹⁾

No load

650-750

E/L operating

650-750

P/S operating

650-750

A/C operating⁽²⁾

Refrigerant pressure low⁽³⁾

700-800

Refrigerant pressure high⁽⁴⁾

725-825

⁽¹⁾

Neutral

⁽²⁾	A/C switch and fan switch are on.

⁽³⁾	Refrigerant pressure switch (middle pressure) is off.

⁽⁴⁾	Refrigerant pressure switch (middle pressure) is on.

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.