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 155 (SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM (AJ))ENGINE CONTROL SYSTEM OPERATION INSPECTIONELECTRONIC THROTTLE CONTROL INSPECTIONTHROTTLE POSITION (TP) SWEEP INSPECTION
2008 Mazda 6 s Sport, 4D Hatchback, Standard
Throttle Position (TP) Sweep Inspection
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Throttle Position (TP) Sweep Inspection
WARNING: This page is about a different car, the 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
- Connect the WDS or equivalent to the DLC-2.
- Turn ignition switch to ON position.
- Verify that following DTCs are not displayed:
- P0121, P0122, P0123, P0221, P0222, P0223, P2100, P2101, P2102, P2103, P2107, P2108, P2119, P2122, P2123, P2127, P2128, P2135, P2136
- If any DTC is displayed, perform DTC inspection. (See DTC TABLE .)
- P0121, P0122, P0123, P0221, P0222, P0223, P2100, P2101, P2102, P2103, P2107, P2108, P2119, P2122, P2123, P2127, P2128, P2135, P2136
- Access TP_REL PID.
- Verify that the PID reading is within the CTP value. (See
PCM INSPECTION
.)
- If the PID reading is out of range, perform the following:
- Remove air duct from throttle body.
- Verify that throttle valve moves when the accelerator pedal is depressed.
- If the throttle valve moves, inspect the following:
- TP sensor and related harness
- If the throttle valve does not move, inspect the following:
- Throttle actuator control motor and related harness
- If the PID reading is out of range, perform the following:
- Gradually move the throttle valve and verify that the PID reading increases linearly.
- If the PID reading drops momentarily, inspect the following:
- TP sensor
- If the PID reading drops momentarily, inspect the following:
- Fully depress the accelerator pedal and verify that the PID reading is within the WOT value. (See
PCM INSPECTION
.)
- If the PID reading is out of range, perform the following:
- Remove air duct from throttle valve body.
- Verify that the throttle valve moves when the accelerator pedal is depressed.
- If the throttle valve moves, inspect the TP sensor and related harness.
- If the throttle valve does not move, inspect the throttle actuator control motor and related harness.
- If the PID reading is out of range, perform the following:
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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.