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Home >> Infiniti >> 2010 >> M45 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 To P0159 >> DTC P0128 Thermostat Function >> DTC Confirmation Procedure >> With Consult-III
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With Consult-III

  1. Turn A/C switch OFF.
  2. Turn blower fan switch OFF.
  3. Turn ignition switch ON.
  4. Select "COOLAN TEMP/S" in "DATA MONITOR" mode with CONSULT-III.
  5. Check that the "COOLAN TEMP/S" is above 56°C (133°F).

    If it is below 56°C (133°F), go to next step.

    If it is above 56°C (133°F), cool down the engine to less than 56°C (133°F). Then go to next steps.

  6. Start engine and drive vehicle for 10 consecutive minutes under the following conditions.
    VEHICLE SPEED SPECIFICATION

    VHCL SPEED SE More than 56 km/h (35 MP)

    If "COOLAN TEMP/S" increases to more than 75°C (167°F) within 10 minutes, turn ignition switch OFF because the test result will be OK  .

  7. Check 1st trip DTC.
  8. If 1st trip DTC is detected, go to "DIAGNOSIS PROCEDURE ".
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