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Home >> Nissan-Datsun >> 2009 >> Quest Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 To P0153 >> DTC P0128 Thermostat Function >> DTC Confirmation Procedure >> With Consult-III

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 the indication of "COOLAN TEMP/S".

    If it is below 52°C (126°F), go to following step.

    If it is above 52°C (126°F), cool down the engine to less than 52°C (126°F), then go to next step.

  6. Start engine.
  7. Drive vehicle for 10 consecutive minutes under the following conditions.
    SPEED REFERENCE CHART

    VHCL SPEED SE More than 56 km/h (35 MPH)
    WARNING: Always drive vehicle at a safe speed.
    If "COOLAN TEMP/S" increases to more than 71°C (160°F) within 10 minutes, turn ignition switch OFF because the test result will be OK.
  8. Check 1st trip DTC.
  9. If 1st trip DTC is detected, go to , "DIAGNOSIS PROCEDURE ".
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