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Home >> Nissan-Datsun >> 2012 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0603 To P2A03 (Qr25DE) >> DTC P1421: Cold Start Control >> DTC Confirmation Procedure
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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 11 V at idle  .

WITH CONSULT

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Select "DATA MONITOR" mode with CONSULT.
  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 "COOLAN 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. Check 1st trip DTC.
  7. If 1st trip DTC is detected, go to "DIAGNOSIS PROCEDURE ".

WITH GST

Follow the procedure "WITH CONSULT" above.

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