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Home >> Infiniti >> 2002 >> G20 Automatic, RE4F03W >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - G20 >> Diagnostic Tests >> DTC P1402: EGR Function >> DTC Confirmation Test (Using CONSULT-II)

DTC Confirmation Test (Using CONSULT-II)

Always perform the test at a temperature above 14°F (-10°C). Engine coolant temperature and EGR temperature must be verified in DATA MONITOR mode with CONSULT-II before starting DTC WORK SUPPORT test. If temperatures are out of the following ranges, the test cannot be conducted.

If the values are out of the ranges indicated above, park vehicle in a cool place and allow engine temperature to stabilize. DO NOT attempt to reduce engine coolant temperature or EGR temperature with a fan or means other than ambient air. Doing so may produce an inaccurate diagnostic result.

  1. Turn ignition off and wait at least 10 seconds. Turn ignition on. Select EGR SYSTEM P1402 of EGR SYSTEM in DTC WORK SUPPORT mode with CONSULT-II. Touch START.
  2. Start engine and let it idle until TESTING on CONSULT-II screen has changed to COMPLETED (It will take 80 seconds or more).
  3. If TESTING is not displayed after 5 minutes, turn ignition off and cool engine coolant temperature to the range of 14-122°F (-10 to 50°C). Retry from step  1.
  4. Press SELF-DIAG RESULTS. If OK is displayed, system is okay at this time. If NG is displayed, go to DIAGNOSTIC PROCEDURE .