LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2007 >> Maxima SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1217 Through P2A03 >> DTC P1421 Cold Start Control >> DTC Confirmation Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Confirmation Procedure

NOTE:
  • If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
  • If DTC P1421 is displayed with other DTC, first perform the trouble diagnosis for other DTC.

TESTING CONDITION: 

Before performing the following procedure, confirm that battery voltage is more than 11V at idle  .

WITH CONSULT-II 

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Select "DATA MONITOR" mode with CONSULT-II.
  4. Check that the "COOLAN TEMP/S" indication is between 4°C (39°F) and 36°C (97°F).

    If "COOLAN TEMP/S" indication is within the specified value, go to the following step.

    If "COOLANT TEMP/S" indication is out of the specified value, cool engine down or warm engine up and go to step  1.

  5. Start engine and let it idle for 5 minutes.
  6. If 1st trip DTC is detected, go to "DTC CONFIRMATION PROCEDURE "
    Fig 1: CONSULT-II Display - Data Monitor
    G04900167Courtesy of NISSAN MOTOR CO., U.S.A.

WITH GST 

Follow the procedure "WITH CONSULT-II" above.