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DTC P0451: FTP Sensor Circuit Range/Performance Problem Honda Odyssey III

Auxiliary Emission Control Systems 25 illustrations ~4309 words

Note. If DTC P2422 is stored at the same time as DTC P0451, troubleshoot DTC P2422 first, then recheck for DTC P0451.

  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine, and let it idle 1 minute.
  4. Monitor the OBD STATUS for DTC P0451 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES - Go to step5 NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the PCM. If the screen indicates NOT COMPLETED, go to step 3 and recheck.
  5. Turn the ignition switch OFF.
  6. Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(ref-220957-S25518953132006022100000) ).
  7. Turn the ignition switch ON (II).
  8. Reset the PCM with the HDS.
  9. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  10. Start the engine, and let it idle 1 minute.
  11. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0451 is indicated, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - Go to step 12.
  12. Monitor the OBD STATUS for DTC P0451 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 10 and recheck.

Scheme 34

Scheme 34: DTC P0452: FTP Sensor Circuit Low Voltage
Scheme 34: DTC P0452: FTP Sensor Circuit Low Voltage

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Scheme 37
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Turn the ignition switch OFF.
  4. Remove the fuel fill cap.
  5. Turn the ignition switch ON (II).
  6. Check the FTP SENSOR in the DATA LIST with the HDS. Is about --7.3 kPa (-2.16 in.Hg, --55 mmHg), or 0.3 V or less indicated? YES - Go to step 10 . NO - Go to step 7.
  7. Install the fuel fill cap.
  8. Start the engine.
  9. Monitor the OBD STATUS for DTC P0452 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES - Go to step 10. NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the PCM. If the screen indicates NOT COMPLETED, go to step 5 and recheck.
  10. Turn the ignition switch OFF.
  11. Disconnect the FTP sensor 3P connector.
  12. Turn the ignition switch ON (II).
  13. Check the FTP SENSOR in the DATA LIST with the HDS. Is about 7.3 kPa (2.15 in.Hg, 54.7 mmHg), or 4.90 V indicated? YES - Go to step 24 . NO - Go to step 14.
  14. Measure voltage between FTP sensor 3P connector terminal No. 1 and body ground. Is there about 5 V? YES - Go to step 20 . NO - Go to step 15.
  15. Turn the ignition switch OFF.
  16. Jump the SCS line with the HDS.
  17. Disconnect PCM connector A (44P).
  18. Connect FTP sensor 3P connector terminal No. 1 to body ground with a jumper wire.
  19. Check for continuity between PCM connector terminal A19 and body ground. Is there continuity? YES - Go to step 32 . NO - Repair open in the wire between the PCM (A19) and the FTP sensor, then go to step 26 .
  20. Turn the ignition switch OFF.
  21. Jump the SCS line with the HDS.
  22. Disconnect PCM connector A (44P).
  23. Check for continuity between FTP sensor 3P connector terminal No. 2 and body ground. Is there continuity? YES - Repair short in the wire between the PCM (A33) and the FTP sensor, then go to step 26 . NO - Go to step 32 .
  24. Turn the ignition switch OFF.
  25. Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(ref-220957-S25518953132006022100000) ).
  26. Reconnect all connectors.
  27. Turn the ignition switch ON (II).
  28. Reset the PCM with the HDS.
  29. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  30. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0452 is indicated, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - Go to step 31.
  31. Monitor the OBD STATUS for DTC P0452 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 29 and recheck.
  32. Update the PCM if it does not have the latest software, or substitute a known-good PCM (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220945-S16531944742006022100000) ).
  33. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0452 is indicated, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-220946-S32339521312006022100000) ).

Scheme 38

Scheme 38: DTC P0453: FTP Sensor Circuit High Voltage
Scheme 38: DTC P0453: FTP Sensor Circuit High Voltage

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Scheme 43
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Turn the ignition switch OFF.
  4. Remove the fuel fill cap.
  5. Turn the ignition switch ON (II).
  6. Check the FTP SENSOR in the DATA LIST with the HDS. Is about 7.3 kPa (2.16 in.Hg, 55 mmHg), or 4.7 V or more indicated? YES - Go to step 10 . NO - Go to step 7.
  7. Install the fuel fill cap.
  8. Start the engine.
  9. Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES - Go to step 10 . NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the PCM. If the screen indicates NOT COMPLETED, go to step 6 and recheck.
  10. Turn the ignition switch OFF.
  11. Disconnect the FTP sensor 3P connector.
  12. Connect FTP sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
  13. Turn the ignition switch ON (II).
  14. Check the FTP SENSOR in the DATA LIST with the HDS. Is about 7.3 kPa (2.16 in.Hg, 55 mmHg), or 4.7 V or more indicated? YES - Go to step 15. NO - Go to step 26 .
  15. Measure voltage between FTP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES - Go to step 21 . NO - Go to step 16.
  16. Turn the ignition switch OFF.
  17. Jump the SCS line with the HDS.
  18. Disconnect PCM connector A (44P).
  19. Connect FTP sensor 3P connector terminal No. 3 to body ground with a jumper wire.
  20. Check for continuity between PCM connector terminal A9 and body ground. Is there continuity? YES - Go to step 34 . NO - Repair open in the wire between the PCM (A9) and the FTP sensor, then go to step 28 .
  21. Turn the ignition switch OFF.
  22. Jump the SCS line with the HDS.
  23. Disconnect PCM connector A (44P).
  24. Connect FTP sensor 3P connector terminal No. 2 to body ground with a jumper wire.
  25. Check for continuity between PCM connector terminal A33 and body ground. Is there continuity? YES - Go to step 34 . NO - Repair open in the wire between the PCM (A33) and the FTP sensor, then go to step 28 .
  26. Turn the ignition switch OFF.
  27. Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(ref-220957-S25518953132006022100000) ).
  28. Reconnect all connectors.
  29. Turn the ignition switch ON (II).
  30. Reset the PCM with the HDS.
  31. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  32. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0453 is indicated, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - Go to step 33.
  33. Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 31 and recheck.
  34. Update the PCM if it does not have the latest software, or substitute a known-good PCM (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220945-S16531944742006022100000) ).
  35. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0453 is indicated, check for poor connections or loose terminals at the FTP sensor and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-220946-S32339521312006022100000) ).

Note. The fuel system is designed to allow specified maximum vacuum and pressure conditions. Do not deviate from the vacuum and pressure tests as indicated in these procedures. Excessive pressure/vacuum would damage the EVAP components or cause eventual fuel tank failure.

Special Tools Required

  1. Vacuum pump/gauge, 0-30 in.Hg, Snap-on YA4000A or equivalent, commercially available
  2. Vacuum/pressure gauge, 0-4 in.Hg, 07JAZ-001000B

Note. Fresh fuel has a higher volatility that will create greater pressure/vacuum. The optimum condition for testing is less than a full tank of fresh fuel, If possible, to assist in leak detection, add 1 gallon of fresh fuel to the tank (as long as it will not fill the tank), just before starting these procedures.

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Scheme 47
  1. Check the fuel fill cap (the cap must say "Tighten to click"). It should turn 1/4 turn after it's tight, then it clicks. Is the fuel fill cap installed and properly tightened? YES - Go to step 2. NO - Replace or tighten the cap, then go to step 22.
  2. Check the fuel fill cap seal (A) and the fuel fill pipe mating surface (B). Verify that the fuel fill cap tether cord (C) is not caught under the cap. Is the fuel fill cap seal missing or damaged, is the fuel fill pipe damaged, or is the tether cord caught under the cap? YES - Replace the fuel fill cap or the fuel fill pipe, then go to step 22. NO - Go to step 3
  3. Turn the ignition switch ON (II).
  4. Clear the DTC with the HDS.
  5. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, or the EVAP canister vent shut valve and the PCM. NO - Go to step 6.
  6. Turn the ignition switch OFF.
  7. Turn the ignition switch ON (II).
  8. Check for a poor connection or damage at the fuel tank vapor recirculation tube. Is the tube OK? YES - Go to step 9. NO - Replace the fuel tank vapor recirculation tube, then go to step 22. If necessary, replace the fuel tank (see «FUEL TANK REPLACEMENT»(ref-220952-S23043706852006022200000) ), then go to step 22.
  9. Disconnect the fuel tank vapor recirculation tube (A) from the EVAP canister (B), and plug the EVAP canister port (C).
  10. Disconnect the vacuum hose (purge line) (A) from the EVAP canister purge valve (B) in the engine compartment, and connect a T-fitting (C) from the vacuum gauge and the vacuum pump/gauge, 0-30 in.Hg, to the vacuum hose (A) (Scheme 46)
  11. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
  12. Apply vacuum to the hose until the FTP reads 1.90 V (-0.59 in.Hg, -15.1 mmHg).
  13. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS. Does the voltage increase more than 0.2 V (0.1 in.Hg, 0.5 mmHg)? YES - Go to step 14. NO - Go to step 19.
  14. Select EVAP CVS OFF in the INSPECTION MENU with the HDS.
  15. Disconnect the fresh air hoses (A) from the EVAP canister vent shut valve (B), and plug the EVAP canister vent shut valve ports (C).
  16. Apply vacuum to the EVAP system until the FTP reads 1.90 V (-0.59 in.Hg, -15.1 mmHg).
  17. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS. Does the voltage increase more than 0.2 V (0.1 in.Hg, 2.5 mmHg)? YES - Go to step 18. NO - Replace the EVAP canister vent shut valve, then go to step 21.
  18. Check for a loose or damaged EVAP canister purge line between the EVAP canister and the EVAP canister purge valve. Is the line OK? YES - Replace these parts, then go to step 21. FTP sensor O-ring EVAP canister vent shut valve case and O-ring EVAP canister NO - Reconnect or repair the EVAP canister purge hose, then go to step 21.
  19. Select EVAP CVS OFF in the INSPECTION MENU with the HDS.
  20. Check these parts for looseness or damage. Fuel fill pipe Fuel vapor return pipe Are the parts OK? YES - Check the fuel tank unit base gasket (see «FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT»(ref-220952-S20217710322006022200000) ), and check the fuel tank, then go to step 21. NO - Repair or replace the damaged parts, then go to step 21.
  21. Reconnect all hoses and connectors.
  22. Turn the ignition switch ON (II).
  23. Reset the PCM with the HDS.
  24. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  25. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Troubleshooting is complete. NO - Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, or the EVAP canister vent shut valve and the PCM, then go to step 1.

Scheme 48

Scheme 48: DTC P0457: EVAP System Leak Detected/Fuel Fill Cap Loose or Missing
Scheme 48: DTC P0457: EVAP System Leak Detected/Fuel Fill Cap Loose or Missing

Scheme 49

Scheme 49
Scheme 49
  1. Check the fuel fill cap (the cap must say "Tighten to click"). It should turn 1/4 turn after it's tight, then it clicks. Is the correct fuel fill cap installed and properly tightened? YES - Go to step 2. NO - Replace or tighten the cap, then go to step 19 .
  2. Check the fuel fill cap seal (A) and the fuel fill pipe mating surface (B). Verify that the fuel fill cap tether cord (C) is not caught under the cap. Is the fuel fill cap seal missing or damaged, is the fuel fill pipe damaged, or is the tether cord caught under the cap? YES - Replace the fuel fill cap or the fuel fill pipe, then go to step 19 . NO - Go to step 3.
  3. Turn the ignition switch ON (II).
  4. Clear the DTC with the HDS.
  5. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM. NO - Go to step 6.
  6. Turn the ignition switch OFF.
  7. Remove the EVAP canister vent shut valve from the EVAP canister (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(ref-220957-S14403349612006022100000) ).
  8. Connect the 2P connector to the EVAP canister vent shut valve.
  9. Turn the ignition switch ON (II).
  10. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
  11. Check the EVAP canister vent shut valve (A) operation. Does the valve operate? YES - Check the routing of the EVAP canister vent tube, then go to step 18 . NO - Go to step 12.
  12. Turn the ignition switch OFF.
  13. Replace the EVAP canister vent shut valve (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(ref-220957-S14403349612006022100000) ).
  14. Turn the ignition switch ON (II).
  15. Reset the PCM with the HDS.
  16. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  17. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Troubleshooting is complete. NO - Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM, then go to step 1 .
  18. Reinstall the EVAP canister vent shut valve.
  19. Turn the ignition switch ON (II).
  20. Reset the PCM with the HDS.
  21. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  22. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Troubleshooting is complete. NO - Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM, then go to step 1 .
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM. NO - Go to step 4.
  4. Turn the ignition switch OFF.
  5. Replace the EVAP canister purge valve (see «EVAP CANISTER PURGE VALVE REPLACEMENT»(ref-220957-S26088231072006022100000) ).
  6. Turn the ignition switch ON (II).
  7. Reset the PCM with the HDS.
  8. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  9. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Troubleshooting is complete. NO - Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM, then go to step 1 .

Special Tools Required

  1. Vacuum/pressure gauge, 0-4 in.Hg, 07JAZ-001000B
  2. Vacuum pump/gauge, 0-30 in.Hg, Snap-on YA4000A or equivalent, commercially available

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Scheme 53
  1. Check the fuel fill cap installation. Is the fuel fill cap installed and properly tightened? YES - Go to step 2. NO - Properly install the fuel fill cap (the cap must say "Tighten to click"). It should turn 1/4 turn after it's tight, then go to step 23.
  2. Turn the ignition switch ON (II).
  3. Clear the DTC with the HDS.
  4. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM. NO - Go to step 5.
  5. Check for a loose or damaged EVAP canister purge line between the intake manifold and the EVAP canister purge valve. Is the line OK? YES - Go to step 6. NO - Reconnect or repair the EVAP canister purge line, then go to step 23.
  6. Disconnect the vacuum hose (A) from the purge joint (B) in the engine compartment, and connect a T-fitting (C) from the vacuum gauge and the vacuum pump/gauge, 0-30 in.Hg, to the vacuum hose (A) (Scheme 50)
  7. Select EVAP PCS ON in the INSPECTION MENU with the HDS.
  8. Slowly apply about 0.6 in.Hg (15 mmHg) of vacuum to the hose. Does it hold vacuum? YES - Replace the EVAP canister purge valve, then go to step 22. NO - Go to step 9.
  9. Reconnect the vacuum hose to the purge joint.
  10. Disconnect the vacuum hose from the EVAP canister purge line (at the EVAP canister side), and connect a T-fitting (A) from the vacuum gauge and the vacuum pump/gauge, 0-30 in.Hg, to the hose (Scheme 51)
  11. Select EVAP PCS ON in the INSPECTION MENU with the HDS.
  12. Slowly apply about 2 kPa (0.6 in.Hg, 15 mmHg) of vacuum to the hose. Does it hold vacuum? YES - Check for a restricted EVAP canister purge line between the EVAP canister purge valve and the EVAP canister, then go to step 22. NO - Go to step 13.
  13. Remove the FTP sensor with its connector connected (see «FTP SENSOR REPLACEMENT»(ref-220957-S25518953132006022100000) ).
  14. Connect a T-fitting (A) from the vacuum pump/gauge, 0-30 in.Hg, and the vacuum pump to the FTP sensor (B) (Scheme 52)
  15. Check and record the FTP SENSOR reading in the DATA LIST with the HDS.
  16. Slowly apply about 1.3 kPa (0.4 in.Hg, 10 mmHg) of vacuum to the hose.
  17. Check the FTP SENSOR in the DATA LIST with the HDS. Is the difference more than 1.1 kPa (0.31 in.Hg, 8 mmHg) before and after applying vacuum? YES - Go to step 18. NO - Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(ref-220957-S25518953132006022100000) ), then go to step 22.
  18. Reconnect the vacuum hoses to the EVAP canister purge line (EVAP canister side), and reinstall the FTP sensor.
  19. Disconnect the vacuum hose (purge line) (A) from the EVAP canister purge valve (B), and connect a T-fitting (C) from the vacuum gauge and the vacuum pump/gauge, 0-30 in.Hg, to the hose (Scheme 53)
  20. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
  21. Slowly apply about 2 kPa (0.6 in.Hg, 15 mmHg) of vacuum to the hose. Does the hose hold vacuum? YES - Check for blockage at the EVAP canister port, then go to step 22. NO - Replace the EVAP canister vent shut valve (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(ref-220957-S14403349612006022100000) ), then go to step 22.
  22. Reconnect all hoses.
  23. Turn the ignition switch ON (II).
  24. Reset the PCM with the HDS.
  25. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  26. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Troubleshooting is complete. NO - Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM, then go to step 1.

Scheme 54

Scheme 54: DTC P0498: EVAP Canister Vent Shut Valve Control Circuit Low Voltage
Scheme 54: DTC P0498: EVAP Canister Vent Shut Valve Control Circuit Low Voltage

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Scheme 58
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0498 indicated? YES - Go to step 6 . NO - Go to step 4.
  4. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
  5. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0498 indicated? YES - Go to step 6. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM.
  6. Turn the ignition switch OFF.
  7. Disconnect the EVAP canister vent shut valve 2P connector.
  8. Turn the ignition switch ON (II).
  9. Measure voltage between EVAP canister vent shut valve 2P connector terminal No. 2 and body ground. Is there battery voltage? YES - Go to step 10. NO - Repair open in the wire between the EVAP canister vent shut valve and the A/F sensor relay (LAF), then go to step 18 .
  10. Turn the ignition switch OFF.
  11. Measure resistance between EVAP canister vent shut valve 2P connector terminals No. 1 and No. 2. Is there about 25-30 ohm at room temperature? YES - Go to step 12. NO - Go to step 17 .
  12. Jump the SCS line with the HDS.
  13. Disconnect PCM connector A (44P).
  14. Check for continuity between PCM connector terminal A10 and body ground. Is there continuity? YES - Repair short in the wire between the EVAP canister vent shut valve and the PCM (A10), then go to step 18 . NO - Go to step 15.
  15. Connect EVAP canister vent shut valve 2P connector terminal No. 1 to body ground with a jumper wire.
  16. Check for continuity between PCM connector terminal A10 and body ground. Is there continuity? YES - Go to step 24 . NO - Repair open in the wire between the EVAP canister vent shut valve and the PCM (A10), then go to step 18 .
  17. Replace the EVAP canister vent shut valve (see «EVAP CANISTER VENT SHUT VALVE REPLACEMENT»(ref-220957-S14403349612006022100000) ).
  18. Reconnect all connectors.
  19. Turn the ignition switch ON (II).
  20. Reset the PCM with the HDS.
  21. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-220951-S17680691112006022100000) ).
  22. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
  23. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0498 is indicated, check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - Troubleshooting is complete.
  24. Update the PCM if it does not have the latest software, or substitute a known-good PCM (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220945-S16531944742006022100000) ).
  25. Select EVAP CVS ON in the INSPECTION MENU with the HDS.
  26. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0498 is indicated, check for poor connections or loose terminals at the EVAP canister vent shut valve and the PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-220946-S32339521312006022100000) ).

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