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 INSPECTIONFUEL PUMP OPERATION INSPECTION
2008 Mazda 6 s Sport, 4D Hatchback, Standard
Fuel Pump Operation Inspection
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Fuel Pump Operation 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.
If simulation function of M-MDS is not used:
- Connect the M-MDS to the DLC-2.
- Remove the fuel-filler cap.
- Turn the ignition switch to the ON position.
- Turn the fuel pump relay from off to on using the FP PID and inspect if the operation sound of the fuel pump is heard.
- If no operation sound is heard, proceed to the next step.
- Measure the voltage at the wiring harness side fuel pump connector terminal B with the FIP PID turned on.
- If the voltage is as specified, inspect the following:
- Fuel pump continuity
- Fuel pump ground
- Wiring harness between the fuel pump relay and PCM terminal 4Q
- If not as specified, inspect the following:
- Fuel pump relay
- Fuel pump speed control relay
- Wiring harness connector (Main relay-fuel pump relay-fuel pump resister-fuel pump).
Specification
8.0-11.5 V (Ignition switch at ON)
- If the voltage is as specified, inspect the following:
If simulation function of M-MDS is not used:
CAUTION:
- Connecting the wrong check connector terminal may possibly cause a malfunction. Carefully connect the specified terminal only.
- Short the check connector terminal F/P to body ground using a jumper wire.
- Remove the fuel-filler cap.
- Turn the ignition switch to the ON position.
- Verify that the fuel pump operation sound is heard.
- If no operation sound is heard, proceed to the next step.
- Measure the voltage at wiring harness side fuel pump connector terminal B.
- If the voltage is as specified, inspect the following:
- Fuel pump continuity
- Fuel pump ground
- Wiring harness between the fuel pump relay and PCM terminal, 4Q
- If not as specified, inspect the following:
- Fuel pump relay
- Fuel pump speed control relay
- Wiring harness connector (Main relay - fuel pump relay - fuel pump resister - fuel pump).
Specification
8.0-11.5 V (Ignition switch at on)
- If the voltage is as specified, inspect the following:
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.