P0443
DTC P0443: EVAP Canister Purge Valve Circuit MalfunctionSpecial Tools Required
- Vacuum pump/gauge, 0 - 30 in.Hg A973X-041-XXXXX
- Vacuum/pressure gauge, 0 - 4 in.Hg 07JAZ-001000B
1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch ON (II).
4. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0443 indicated?
YES - Go to step 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 PCM.
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 131 °F (56 °C).
Is there vacuum?
YES - Go to step 8.
NO - Go to step 15.
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 terminal No.1 and body ground.
Is there continuity?
YES - Go to step 11.
NO - Go to step 24.
11. Turn the ignition switch OFF.
12. Jump the SCS line with the HDS.
13. Disconnect PCM connector A (73P).
14. Check for continuity between EVAP canister purge valve 2P connector terminal No.1 and body ground.
Is there continuity?
YES - Repair short in the wire between the EVAP canister purge valve and the PCM (A16), then go to step 25.
NO - Go to step 32.
15. Turn the ignition switch OFF.
16. Disconnect the EVAP canister purge valve 2P connector.
17. Turn the ignition switch ON (II).
18. Measure voltage between the EVAP canister purge valve 2P connector terminal No.2 and body ground.
Is there battery voltage?
YES - Go to step 19.
NO - Repair open in the wire between the EVAP canister purge valve and the A/F sensor relay, then go to step 26.
19. Turn the ignition switch OFF.
20. Jump the SCS line with the HDS.
21. Disconnect PCM connector A (73P).
22. Check for continuity between the PCM connector terminal A16 and EVAP canister purge valve 2P connector terminal No.1.
Is there continuity?
YES - Go to step 23.
NO - Repair open in the wire between the EVAP canister purge valve and the PCM (A16), then go to step 25.
23. Measure resistance between the EVAP canister purge valve 2P connector terminals No.1 and No.2.
Is there about 28 Ohms at room temperature?
YES - Go to step 32.
NO - Go to step 24.
24. Replace the EVAP canister purge valve.
25. Reconnect PCM connector A (73P).
26. Reconnect the EVAP canister purge valve 2P connector.
27. Turn the ignition switch ON (II).
28. Reset the PCM with the HDS.
29. Do the PCM idle learn procedure.
30. Start the engine. Hold the engine speed at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle.
31. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC P2413 is indicated, check for poor connections or loose terminals at the EVAP canister purge valve and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Troubleshooting is complete.
32. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
33. Start the engine. Hold the engine speed at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle.
34. Check for Temporary DTCs or DTCs with 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 PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM.