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Home >> Mazda >> 2007 >> 3 Mazdaspeed, 2.3 L >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting (L3 With TC) >> Engine Control System Operation Inspection >> Electronic Throttle Control System Inspection >> Load compensation inspection
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Load compensation inspection

  1. Start the engine and run it is idling.
  2. Connect the M-MDS to the DLC-2.
  3. Verify that DTC P0506 or P0507 is not displayed.
    • If DTC P0506, or P0507 is displayed, perform the DTC inspection.

      (See DTC TABLE .)

  4. Select the RPM PID.
    NOTE:
    • Excludes temporary idle speed drop just after the loads are turned on.
  5. Verify that the engine speed is within the specification under each load condition.
    • If the load condition is not as specified, inspect the following:

Engine speed

ENGINE SPEED SPECIFICATIONS

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-S00
Refrigerant pressure high(4) 700-800
(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.