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Home >> Nissan-Datsun >> 2004 >> Frontier Base, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control System - KA24DE >> DTC P0402: EGRC-BPT Valve Function >> Diagnostic Procedure

Diagnostic Procedure

  1. CHECK HOSE 

    Check vacuum hose for clogging and improper connection.

    OK or NG 

    1. OK: GO TO 2.
    2. NG: Repair or replace vacuum hose.
  2. CHECK EXHAUST SYSTEM 

    Check exhaust system for collapse.

    OK or NG 

    1. OK: GO TO 3.
    2. NG: Repair or replace exhaust system.
  3. CHECK ORIFICE 

    Check if orifice is installed in vacuum hose between EGRC-BPT valve and EGRC solenoid valve.

    OK or NG 

    1. OK: GO TO 4.
    2. NG: Replace vacuum hose.
  4. CHECK EGRC-BPT VALVE 

    Refer to COMPONENT INSPECTION .

    OK or NG 

    1. OK: GO TO 5.
    2. NG: Replace EGRC-BPT valve.
  5. CHECK CAMSHAFT POSITION SENSOR 

    Refer to COMPONENT INSPECTION .

    OK or NG 

    1. OK: GO TO 6.
    2. NG: Replace camshaft position sensor.
  6. CHECK MASS AIR FLOW SENSOR 

    Refer to COMPONENT INSPECTION .

    OK or NG 

    1. OK: GO TO 7.
    2. NG: Replace mass air flow sensor.
  7. CHECK EGRC SOLENOID VALVE 

    Refer to COMPONENT INSPECTION .

    OK or NG 

    1. OK: GO TO 8.
    2. NG: Replace EGRC solenoid valve.
  8. CHECK EGR VALVE 

    Refer to COMPONENT INSPECTION .

    OK or NG 

    1. OK: GO TO 9.
    2. NG: Replace EGR valve.
  9. CHECK INTERMITTENT INCIDENT 

    Perform TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    1. : INSPECTION END. 
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