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Home >> Nissan-Datsun >> 2008 >> Maxima SL >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS P1148 To P2A03 >> 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 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: 

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

WITH CONSULT-III 

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

WITH GST 

Follow the procedure "WITH CONSULT-III" above.

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