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.
2007 Mazda 6 V6-3.0LFACTORY OEM SERVICE PROCEDURE
Air Flow Meter/Sensor: Testing and Inspection
MASS AIR FLOW (MAF) SENSOR INSPECTION[AJ]
NOTE: Perform the following inspection only when directed.
Visual Inspection
1. Visually inspect for the following on the MAF/IAT sensor.
- Damage
- Cracks
- Bent terminals
- Terminal rust
- If any of the above are found, replace the MAF/IAT sensor.
MAF Rate and Load Value
NOTE: The scan tool shows the MAF rate and load value.
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Inspect the following harnesses for open or short circuit. (Continuity check)
Open circuit
- MAF/IAT sensor terminal A and main relay terminal C
- MAF/IAT sensor terminal B and PCM terminal 1 P
- MAF/IAT sensor terminal C and PCM terminal 1AK
Short circuit
- MAF/IAT sensor terminal A and body ground
- MAF/IAT sensor terminal B and power supply
- MAF/IAT sensor terminal C and power supply
- MAF/IAT sensor terminal C and body ground
NOTE: Perform the following inspection only when directed.
Visual Inspection
1. Visually inspect for the following on the MAF/IAT sensor.
- Damage
- Cracks
- Bent terminals
- Terminal rust
- If any of the above are found, replace the MAF/IAT sensor.
MAF Rate and Load Value
Specification:
NOTE: The scan tool shows the MAF rate and load value.
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Inspect the following harnesses for open or short circuit. (Continuity check)
Open circuit
- MAF/IAT sensor terminal A and main relay terminal C
- MAF/IAT sensor terminal B and PCM terminal 1 P
- MAF/IAT sensor terminal C and PCM terminal 1AK
Short circuit
- MAF/IAT sensor terminal A and body ground
- MAF/IAT sensor terminal B and power supply
- MAF/IAT sensor terminal C and power supply
- MAF/IAT sensor terminal C and body ground
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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