| DTC P0443: | EVAP Canister Purge Valve Circuit Malfunction |
Special Tools Required
Vacuum Pump/Gauge, 0 30 in.Hg ( A973X-041-XXXXX)
| 1. | Turn the ignition switch ON (II). |
| 2. | Do the DTC CLEAR in the CLEAR MENU with the Honda PGM Tester or the HDS. |
| 3. | Turn the ignition switch ON (II). |
| 4. | Check for Temporary DTCs or DTCs in the DTCs MENU with the Honda PGM Tester or the HDS. Is DTC P0443 indicated? YES - Go to 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the EVAP canister purge valve and the ECM/PCM.n |
| 5. | Turn the ignition switch OFF. |
| 6. | Disconnect the vacuum hose (A) from the EVAP canister purge valve (B) and connect a vacuum pump/gauge to the hose. |
| 7. | Start the engine and let it idle. NOTE: The ECT SENSOR in the DATA LIST must be below 65°C (149°F). Is there vacuum? YES - Go to 8. NO - Go to 14. |
| 8. | Turn the ignition switch OFF. |
| 9. | Disconnect the EVAP canister purge valve 2P connector. |
| 10. | Check for continuity between the EVAP canister purge valve 2P connector No. 2 and body ground. Is there continuity? YES - Go to 11. NO - Go to 24. |
| 11. | Jump the SCS line with the Honda PGM Tester or the HDS. |
| 12. | Disconnect ECM/PCM connector B (24P). |
| 13. | Check for continuity between the EVAP canister purge valve 2P connector terminal No. 2 and body ground. Is there continuity? YES - Repair short in the wire between the EVAP canister purge valve and the ECM/PCM (B21), then go to 25. NO - Go to 32. |
| 14. | Turn the ignition switch OFF. |
| 15. | Disconnect the EVAP canister purge valve 2P connector. |
| 16. | Turn the ignition switch ON (II). |
| 17. | Measure voltage between the EVAP canister purge valve 2P connector terminal No. 1 and body ground. Is there battery voltage? YES - Go to 18. NO - Repair open in the wire between the EVAP canister purge valve and the No. 18 ACG (15A) fuse in the under-dash fuse/relay box, then go to 26. |
| 18. | Turn the ignition switch OFF. |
| 19. | Jump the SCS line with the Honda PGM Tester or the HDS. |
| 20. | Disconnect ECM/PCM connector B (24P). |
| 21. | Connect the EVAP canister purge valve 2P connector terminal No. 2 to body ground with a jumper wire. |
| 22. | Check for continuity between ECM/PCM connector terminal B21 and body ground. Is there continuity? YES - Go to 23. NO - Repair open in the wire between the EVAP canister purge valve and the ECM/PCM (B21), then go to 25. |
| 23. | Measure resistance between the EVAP canister purge valve 2P connector terminals No. 1 and No. 2. Is there about 33 W at room temperature? YES - Go to 32. NO - Go to 24. |
| 24. | Replace the EVAP canister purge valve. |
| 25. | Reconnect ECM/PCM connector B (24P). |
| 26. | Reconnect the EVAP canister purge valve 2P connector. |
| 27. | Turn the ignition switch ON (II). |
| 28. | Do the ECM/PCM RESET in the CLEAR MENU with the Honda PGM Tester or the HDS. |
| 29. | Do the ECM/PCM idle learn procedure. |
| 30. | Start the engine. Hold the engine speed at 3,000 rpm (min-1) with no load (in Park or neutral) until the radiator fan comes on, then let it idle. |
| 31. | Check for Temporary DTCs or DTCs in the DTCs MENU with the Honda PGM Tester or the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0443 is indicated, check for poor connections or loose terminals at the EVAP canister purge valve and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC troubleshooting. NO - Troubleshooting is complete.n |
| 32. | Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM. |
| 33. | Start the engine. Hold the engine speed at 3,000 rpm (min-1) with no load (in Park or neutral) until the radiator fan comes on, then let it idle. |
| 34. | Check for Temporary DTCs or DTCs in the DTCs MENU with the Honda PGM Tester or the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0443 is indicated, check for poor connections or loose terminals at the EVAP canister purge valve and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC troubleshooting. NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.n |