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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 891 (Engine Control System (Diagnostic Codes & Symptom Tests)) >> DTC/Circuit Diagnosis >> DTC P0128: Thermostat Function >> DTC Confirmation Procedure >> With Consult

With Consult

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

TESTING CONDITION: 

  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.
  5. Check the indication of "COOLAN TEMP/S".

    If it is below 56°C (133°F), go to following 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.
  7. Drive vehicle for 10 consecutive minutes under the following conditions.
    VHCL SPEED SE More than 56 km/h (35 MPH)

    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. 

  8. Check 1st trip DTC.
  9. If 1st trip DTC is detected, go to "DTC CONFIRMATION PROCEDURE ".