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Home >> Mazda >> 2006 >> MX-5 Miata Base >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting [Engine] >> Engine Control System Operation Inspection >> Electronic Throttle Control System Inspection >> Throttle Position (TP) Sweep Inspection
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Throttle Position (TP) Sweep Inspection

  1. Connect the WDS or equivalent to the DLC-2.
  2. Turn the ignition switch to the ON position.
  3. Verify that none of the following DTC are displayed:
    • P0122, P0123, P0222, P0223, P0638, P2101, P2107, P2108, P2109, P2112, P2119, P2122, P2123, P2127, P2128, P2135, P2138
      • If any one DTC is displayed, perform DTC inspection.
  4. Access TP_REL PID.
  5. 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 the air duct from the throttle valve body.
      • Verify that the throttle valve opens when the accelerator pedal is depressed.
        • If the throttle valve opens, inspect the throttle position sensor and related wiring harness.
        • If the throttle valve does not open, inspect the throttle actuator control motor and related wiring harness.
  6. Gradually depress the throttle pedal and verify that the PID reading increases accordingly.
    • If the PID reading drops momentarily, inspect the following:
      • Throttle position sensor
  7. Fully depress the throttle pedal and verify that the PID reading is within WOT value. (See PCM INSPECTION .)
    • If the PID reading is out of range, perform the followings:
      • Remove the air duct from throttle valve body.
      • Verify that the throttle valve opens when throttle pedal is depressed.
        • If the throttle valve opens, inspect the throttle position sensor and related wiring harness.
        • If the throttle valve does not open, inspect the throttle actuator control motor and related wiring harness.