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Home >> Nissan-Datsun >> 2008 >> Maxima SL >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS U1000 To P0153 >> DTC P0128 Thermostat Function >> DTC Confirmation Procedure
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DTC Confirmation Procedure

NOTE: If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION: 

WITH CONSULT-III 

  1. Turn A/C switch OFF.
  2. Turn blower fan switch OFF.
  3. Turn ignition switch ON.
  4. Check the indication of "COOLAN TEMP/S".
  5. If it is below 71°C (160°F), go to following step.

    If it is above 71°C (160°F), cool down the engine to less than 71°C (160°F), then go to next step.

  6. Start engine.
  7. Wait at idle for a least 30 minutes.

    If "COOLAN TEMP/S" increases to more than 71°C (160°F) within 30 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 "DIAGNOSTIC PROCEDURE ".

WITH GST 

  1. Follow the procedure "WITH CONSULT-III" above.