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Home >> Honda >> 2000 >> CR-V SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Engine Controls - Self-Diagnostics - 4.3L) >> Diagnostic Trouble Code Identification >> DTC P1404: EGR Valve Closed Pintle Position >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform On-Board Diagnostic II (OBD-II) System Check. See SELF-DIAGNOSTICS - INTRODUCTION article. Retrieve and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Turn ignition on, with engine off. Using scan tool, command EGR valve to zero, 25, 50, 75, and then 100 percent. If ACTUAL EGR POSITION follows DESIRED EGR POSITION, go to next step. If ACTUAL EGR POSITION does not follow DESIRED EGR POSITION, go to step  4.
  3. DTC P1404 is intermittent. If any additional DTCs are set, diagnose affected DTCs. If no additional DTCs are set, go see DIAGNOSTIC AIDS .
  4. Disconnect EGR valve harness connector. If ACTUAL EGR POSITION is near zero percent, go to step  6. If not, go to next step.
  5. Check EGR valve signal circuit (Brown wire) for short to voltage. Repair as necessary. After repairs, go to step  13. If circuit is okay, go to next step.
  6. Using DVOM connected to ground, probe EGR valve 5-volt reference circuit (Gray wire) terminal at harness connector. If about 5 volts exist, go to next step. If about 5 volts does not exist, go to step  8.
  7. Using a test light connected to ground, probe EGR ignition feed circuit (Red wire). If test light comes on, go to step  9. If test light does not come on, go to step  10.
  8. Check EGR valve 5-volt reference circuit (Gray wire) for short to voltage. Repair circuit as necessary. After repair, go to step  16. If circuit is okay, go to step  14.
  9. Check EGR ignition feed circuit (Red wire) for short to voltage. Repair as necessary. After repair, go to step  16. If circuit is okay, go to step  14.
  10. Using a test light connected to battery voltage, probe EGR sensor ground circuit (Black wire) terminal. If test light comes on, go to next step. If test light does not come on, go to step  12.
  11. Check EGR valve sensor ground circuit (Black wire) for poor connection at EGR harness connector. Repair as necessary. After repair, go to step  16. If circuit is okay, go to step  13.
  12. Check EGR valve sensor ground circuit (Black wire) for open. Repair as necessary. After repair, go to step  16. If circuit is okay, go to step  14.
  13. Replace EGR valve. After replacing EGR, go to step  16.
  14. Check VCM harness connector for poor connection. Repair as necessary. After repair, go to step  16. If connections are okay, go to next step.
  15. Replace VCM. Program replacement VCM. See PROGRAMMING . After replacing VCM, go to next step.
  16. Using scan tool, select CLEAR INFO or CLEAR DTCS function to clear DTCs. Start engine and allow it to idle. Ensure engine is at normal operating temperature. Operate vehicle within conditions required for setting this DTC. Select SPECIFIC DTC function then enter DTC P1404. If scan tool indicates TEST RAN AND PASSED, go to next step. If scan tool does not indicate TEST RAN AND PASSED, repeat step  2.
  17. If any other DTCs are set, diagnose DTCs as necessary. If no other DTCs are set, no problem is indicated at this time. See DIAGNOSTIC AIDS.
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