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EGR System Acura TL III

Auxiliary Emission Control Systems 36 illustrations ~4506 words

Scheme 91

Scheme 91: Component Location Index
Scheme 91: Component Location Index

DTC Troubleshooting

DTCDescription
DTC P0401EGR Insufficient Flow
DTC P0404EGR Control Circuit Range/Performance Problem
DTC P0406EGR Valve Position Sensor Circuit High Voltage (2004-2005 models)
DTC P0406EGR Valve Position Sensor Circuit High Voltage (2006 model)
DTC P2413EGR System Malfunction (2004-2005 models)
DTC P2413EGR System Malfunction (2006 model)

DTC TROUBLESHOOTING INDEX

DTC P0401: EGR Insufficient Flow

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  4. Do the EGR TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Go to step 5 . NO - Go to step 7 .
  5. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 4th gear) Vehicle speed at 25 mph (40 km/h) or more, and engine speed between 1,100 rpm and 3,000 rpm During the drive, decelerate (with the throttle fully closed) for 5 seconds
  6. Monitor the OBD STATUS for DTC P0401 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES - Remove the intake manifold cover (see step 1 ), clean the intake manifold cover, and EGR ports with throttle plate and induction cleaner, then go to step 9 . NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 5 and recheck.
  7. Turn the ignition switch OFF.
  8. Replace the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  9. Turn the ignition switch ON (II).
  10. Reset the ECM/PCM with the HDS.
  11. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  12. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 4th gear) Vehicle speed at 25 mph (40 km/h) or more, and engine speed between 1,100 rpm and 3,000 rpm During the drive, decelerate (with the throttle fully closed) for 5 seconds
  13. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0401 is indicated, check for poor connections or loose terminals at the EGR valve and the ECM/PCM, then go to step 1 . If the connections are OK, go to step 15 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Go to step 14 .
  14. Monitor the OBD STATUS for DTC P0401 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, go to step 1 and recheck. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 12 and recheck.
  15. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO TROUBLESHOOT CIRCUITS AT THE ECM/PCM»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-troubleshoot-circuits-at-the) ).
  16. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 4th gear) Vehicle speed at 25 mph (40 km/h) or more, and engine speed between 1,100 rpm and 3,000 rpm During the drive, decelerate (with the throttle fully closed) for 5 seconds
  17. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0401 is indicated, check for poor connections or loose terminals at the EGR valve and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0404: EGR Control Circuit Range/Performance Problem

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 92

Scheme 92: DTC P0404: EGR Control Circuit Range/Performance Problem
Scheme 92: DTC P0404: EGR Control Circuit Range/Performance Problem

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  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  4. Do the EGR TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Intermittent failure, system is OK at this time. Clean any carbon build-up on the EGR valve with throttle plate and induction cleaner. NO - Go to step 5 .
  5. Turn the ignition switch OFF.
  6. Disconnect the EGR valve 6P connector.
  7. At the sensor side, measure resistance between EGR valve 6P connector terminals No. 1 and No. 2. Is there 100 kohm or more? YES - Go to step 26 . NO - Go to step 8 .
  8. Measure resistance between EGR valve 6P connector terminals No. 1 and No. 3. Is there 100 kohm or more? YES - Go to step 26 . NO - Go to step 9 .
  9. Check for continuity between EGR valve 6P connector terminal No. 6 and body ground. Is there continuity? YES - Go to step 10 . NO - Repair open in the wire between the EGR valve and G101, then go to step 27 .
  10. Jump the SCS line with the HDS.
  11. Disconnect ECM/PCM connector B (24P).
  12. Check for continuity between ECM/PCM connector terminal B5 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (B5) and the EGR valve, then go to step 27 . NO - Go to step 13 .
  13. Connect EGR valve 6P connector terminal No. 4 to body ground with a jumper wire.
  14. Check for continuity between ECM/PCM connector terminal B5 and body ground. Is there continuity? YES - Go to step 15 . NO - Repair open in the wire between the ECM/PCM (B5) and the EGR valve, then go to step 27 .
  15. Remove the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  16. Clean the intake manifold EGR port and the passage inside the EGR valve with throttle plate and induction cleaner.
  17. Install the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  18. Reconnect the EGR valve 6P connector.
  19. Reconnect ECM/PCM connector B (24P).
  20. Turn the ignition switch ON (II).
  21. Reset the ECM/PCM with the HDS.
  22. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  23. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  24. Do the EGR TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Go to step 33 . NO - Go to step 25 .
  25. Turn the ignition switch OFF.
  26. Replace the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  27. Reconnect all connectors.
  28. Turn the ignition switch ON (II).
  29. Reset the ECM/PCM with the HDS.
  30. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  31. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  32. Do the EGR TEST in the INSPECTION MENU with the HDS.
  33. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0404 is indicated, check for poor connections or loose terminals at the EGR valve and the ECM/PCM. If the connections and terminals are OK, go to step 35 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Go to step 34 .
  34. Monitor the OBD STATUS for DTC P0404 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, go to step 1 and recheck. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 31 and recheck.
  35. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO TROUBLESHOOT CIRCUITS AT THE ECM/PCM»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-troubleshoot-circuits-at-the) ).
  36. Do the EGR TEST in the INSPECTION MENU with the HDS.
  37. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0404 is indicated, check for poor connections or loose terminals at the EGR valve and the ECM/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 ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0406: EGR Valve Position Sensor Circuit High Voltage (2004-2005 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 98

Scheme 98: DTC P0406: EGR Valve Position Sensor Circuit High Voltage (2004-2005 models)
Scheme 98: DTC P0406: EGR Valve Position Sensor Circuit High Voltage (2004-2005 models)

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  1. Turn the ignition switch ON (II).
  2. Check the EGR VLS in the DATA LIST with the HDS. Is 4.88 V or more indicated? YES - Go to step 3 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the EGR valve and the ECM/PCM.
  3. Turn the ignition switch OFF.
  4. Disconnect the EGR valve 6P connector.
  5. Turn the ignition switch ON (II).
  6. Measure voltage between EGR valve 6P connector terminals No. 2 and No. 3. Is there about 5 V? YES - Go to step 8 . NO - Go to step 7 .
  7. Measure voltage between ECM/PCM connector terminals D12 and D10. Is there about 5 V? YES - Repair open in the wire between the EGR valve and the ECM/PCM (D10), then go to step 10 . NO - Go to step 15 .
  8. Turn the ignition switch OFF.
  9. Replace the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  10. Reconnect all connectors.
  11. Turn the ignition switch ON (II).
  12. Reset the ECM/PCM with the HDS.
  13. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  14. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0406 is indicated, check for poor connections or loose terminals at the EGR valve and the ECM/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.
  15. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO TROUBLESHOOT CIRCUITS AT THE ECM/PCM»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-troubleshoot-circuits-at-the) ).
  16. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0406 is indicated, check for poor connections or loose terminals at the EGR valve and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting. NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0406: EGR Valve Position Sensor Circuit High Voltage (2006 Model)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 100

Scheme 100: DTC P0406: EGR Valve Position Sensor Circuit High Voltage (2006 Model)
Scheme 100: DTC P0406: EGR Valve Position Sensor Circuit High Voltage (2006 Model)

Scheme 101

Scheme 101
Scheme 101
  1. Turn the ignition switch ON (II).
  2. Check the EGR VLS in the DATA LIST with the HDS. Is 4.88 V or more indicated? YES - Go to step 3 . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the EGR valve and the ECM/PCM.
  3. Turn the ignition switch OFF.
  4. Disconnect the EGR valve 6P connector.
  5. Turn the ignition switch ON (II).
  6. Measure voltage between EGR valve 6P connector terminals No. 2 and No. 3. Is there about 5 V? YES - Go to step 8 . NO - Go to step 7 .
  7. Measure voltage between ECM/PCM connector terminals C14 and C12. Is there about 5 V? YES - Repair open in the wire between the EGR valve and the ECM/PCM (C12), then go to step 10 . NO - Go to step 15 .
  8. Turn the ignition switch OFF.
  9. Replace the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  10. Reconnect all connectors.
  11. Turn the ignition switch ON (II).
  12. Reset the ECM/PCM with the HDS.
  13. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  14. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0406 is indicated, check for poor connections or loose terminals at the EGR valve and the ECM/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.
  15. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO TROUBLESHOOT CIRCUITS AT THE ECM/PCM»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-troubleshoot-circuits-at-the) ).
  16. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0406 is indicated, check for poor connections or loose terminals at the EGR valve and the ECM/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 ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#pgm-fi-system) ).

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 102

Scheme 102: DTC P2413: EGR System Malfunction (2004-2005 models)
Scheme 102: DTC P2413: EGR System Malfunction (2004-2005 models)

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  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  4. Do the EGR 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 EGR valve and the ECM/PCM. NO - Go to step 5 .
  5. Turn the ignition switch OFF.
  6. Turn the ignition switch ON (II).
  7. Check the EGR VLS in the DATA LIST with the HDS. Is about 0 V indicated? YES - Go to step 8 . NO - Go to step 19 .
  8. Turn the ignition switch OFF.
  9. Disconnect the EGR valve 6P connector.
  10. Turn the ignition switch ON (II).
  11. Measure voltage between EGR valve 6P connector terminal No. 3 and body ground. Is there about 5 V? YES - Go to step 13 . NO - Go to step 12 .
  12. Measure voltage between ECM/PCM connector terminal D12 and body ground. Is there about 5 V? YES - Repair open in the wire between the EGR valve and the ECM/PCM (D12), then go to step 44 . NO - Go to step 50 .
  13. Turn the ignition switch OFF.
  14. Jump the SCS line with the HDS.
  15. Disconnect ECM/PCM connector D (17P).
  16. Check for continuity between ECM/PCM connector terminal D11 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (D11) and the EGR valve, then go to step 44 . NO - Go to step 17 .
  17. Connect EGR valve 6P connector terminal No. 1 to body ground with a jumper wire.
  18. Check for continuity between ECM/PCM connector terminal D11 and body ground. Is there continuity? YES - Go to step 19 . NO - Repair open in the wire between the ECM/PCM (D11) and the EGR valve, then go to step 44 .
  19. Turn the ignition switch OFF.
  20. Disconnect the EGR valve 6P connector (Skip this step if the connector is already disconnected).
  21. At the sensor side, measure resistance between EGR valve 6P connector terminals No. 1 and No. 2. Is there continuity or resistance of 100 kohm or more? YES - Go to step 43 . NO - Go to step 22 .
  22. Measure resistance between EGR valve 6P connector terminals No. 1 and No. 3. Is there 100 kohm or more? YES - Go to step 43 . NO - Go to step 23 .
  23. Jump the SCS line with the HDS.
  24. Disconnect ECM/PCM connector B (24P).
  25. Check for continuity between ECM/PCM connector terminal B5 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (B5) and the EGR valve, then go to step 44 . NO - Go to step 26 .
  26. Connect EGR valve 6P connector terminal No. 4 to body ground with a jumper wire.
  27. Check for continuity between ECM/PCM connector terminal B5 and body ground. Is there continuity? YES - Go to step 28 . NO - Repair open in the wire between the ECM/PCM (B5) and the EGR valve, then go to step 44 .
  28. Remove the jumper wire from the EGR valve 6P connector.
  29. Check for continuity between EGR valve 6P connector terminal No. 6 and body ground. Is there continuity? YES - Go to step 30 . NO - Repair open in the wire between the EGR valve and G101, then go to step 44 .
  30. Reconnect ECM/PCM connector B (24P).
  31. Connect the battery positive terminal to EGR valve 6P connector terminal No. 4 with a jumper wire.
  32. Start the engine and let it idle, then connect the battery negative terminal to EGR valve 6P connector terminal No. 6 with a jumper wire. Does the engine stall or run rough? YES - Go to step 51 . NO - Go to step 33 .
  33. Turn the ignition switch OFF.
  34. Remove the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  35. Clean the intake manifold EGR port and the passage inside the EGR valve with throttle plate and induction cleaner.
  36. Install the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  37. Reconnect all connectors.
  38. Turn the ignition switch ON (II).
  39. Reset the ECM/PCM with the HDS.
  40. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  41. Do the EGR TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Go to step 49 . NO - Go to step 42 .
  42. Turn the ignition switch OFF.
  43. Replace the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  44. Reconnect all connectors.
  45. Turn the ignition switch ON (II).
  46. Reset the ECM/PCM with the HDS.
  47. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  48. Do the EGR TEST in the INSPECTION MENU with the HDS.
  49. 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 EGR valve and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Go to step 50 .
  50. Monitor the OBD STATUS for DTC P2413 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, go to step 1 and recheck. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 48 and recheck.
  51. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO TROUBLESHOOT CIRCUITS AT THE ECM/PCM»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-troubleshoot-circuits-at-the) ).
  52. Do the EGR TEST in the INSPECTION MENU with the HDS.
  53. 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 EGR valve and the ECM/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 ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#pgm-fi-system) ).

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 114

Scheme 114: DTC P2413: EGR System Malfunction (2006 model)
Scheme 114: DTC P2413: EGR System Malfunction (2006 model)

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  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  4. Do the EGR 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 EGR valve and the ECM/PCM. NO - Go to step 5 .
  5. Turn the ignition switch OFF.
  6. Turn the ignition switch ON (II).
  7. Check the EGR VLS in the DATA LIST with the HDS. Is about 0 V indicated? YES - Go to step 8 . NO - Go to step 19 .
  8. Turn the ignition switch OFF.
  9. Disconnect the EGR valve 6P connector.
  10. Turn the ignition switch ON (II).
  11. Measure voltage between EGR valve 6P connector terminal No. 3 and body ground. Is there about 5 V? YES - Go to step 13 . NO - Go to step 12 .
  12. Measure voltage between ECM/PCM connector terminal C14 and body ground. Is there about 5 V? YES - Repair open in the wire between the EGR valve and the ECM/PCM (C14), then go to step 44 . NO - Go to step 50 .
  13. Turn the ignition switch OFF.
  14. Jump the SCS line with the HDS.
  15. Disconnect ECM/PCM connector C (22P).
  16. Check for continuity between ECM/PCM connector terminal C13 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (C13) and the EGR valve, then go to step 44 . NO - Go to step 17 .
  17. Connect EGR valve 6P connector terminal No. 1 to body ground with a jumper wire.
  18. Check for continuity between ECM/PCM connector terminal C13 and body ground. Is there continuity? YES - Go to step 19 . NO - Repair open in the wire between the ECM/PCM (C13) and the EGR valve, then go to step 44 .
  19. Turn the ignition switch OFF.
  20. Disconnect the EGR valve 6P connector (Skip this step if the connector is already disconnected).
  21. At the sensor side, measure resistance between EGR valve 6P connector terminals No. 1 and No. 2. Is there continuity or resistance of 100 kohm or more? YES - Go to step 43 . NO - Go to step 22 .
  22. Measure resistance between EGR valve 6P connector terminals No. 1 and No. 3. Is there 100 kohm or more? YES - Go to step 43 . NO - Go to step 23 .
  23. Jump the SCS line with the HDS.
  24. Disconnect ECM/PCM connector B (24P).
  25. Check for continuity between ECM/PCM connector terminal B5 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (B5) and the EGR valve, then go to step 44 . NO - Go to step 26 .
  26. Connect EGR valve 6P connector terminal No. 4 to body ground with a jumper wire.
  27. Check for continuity between ECM/PCM connector terminal B5 and body ground. Is there continuity? YES - Go to step 28 . NO - Repair open in the wire between the ECM/PCM (B5) and the EGR valve, then go to step 44 .
  28. Remove the jumper wire from the EGR valve 6P connector.
  29. Check for continuity between EGR valve 6P connector terminal No. 6 and body ground. Is there continuity? YES - Go to step 30 . NO - Repair open in the wire between the EGR valve and G101, then go to step 44 .
  30. Reconnect ECM/PCM connector B (24P).
  31. Connect the battery positive terminal to EGR valve 6P connector terminal No. 4 with a jumper wire.
  32. Start the engine and let it idle, then connect the battery negative terminal to EGR valve 6P connector terminal No. 6 with a jumper wire. Does the engine stall or run rough? YES - Go to step 51 . NO - Go to step 33 .
  33. Turn the ignition switch OFF.
  34. Remove the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  35. Clean the intake manifold EGR port and the passage inside the EGR valve with throttle plate and induction cleaner.
  36. Install the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  37. Reconnect all connectors.
  38. Turn the ignition switch ON (II).
  39. Reset the ECM/PCM with the HDS.
  40. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  41. Do the EGR TEST in the INSPECTION MENU with the HDS. Is the result OK? YES - Go to step 49 . NO - Go to step 42 .
  42. Turn the ignition switch OFF.
  43. Replace the EGR valve (see «EGR VALVE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#egr-system) ).
  44. Reconnect all connectors.
  45. Turn the ignition switch ON (II).
  46. Reset the ECM/PCM with the HDS.
  47. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  48. Do the EGR TEST in the INSPECTION MENU with the HDS.
  49. 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 EGR valve and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Go to step 50 .
  50. Monitor the OBD STATUS for DTC P2413 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, go to step 1 and recheck. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 48 . and recheck.
  51. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO TROUBLESHOOT CIRCUITS AT THE ECM/PCM»(/acura/tl/iii-2003-2006/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-troubleshoot-circuits-at-the) )
  52. Do the EGR TEST in the INSPECTION MENU with the HDS.
  53. 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 EGR valve and the ECM/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 ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iii-2003-2006/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 126

Scheme 126: EGR Valve Replacement
Scheme 126: EGR Valve Replacement
  1. Remove the intake manifold cover (see step 1 on «REMOVAL»(/acura/tl/iii-2003-2006/remont/exhaust/#intake-manifold-and-exhaust-system) ).
  2. Disconnect EGR valve 6P connector (A).
  3. Remove the EGR valve (B).
  4. Install the valve in the reverse order of removal with a new gasket (C).
  5. Install the intake manifold cover (see step 9 on «INSTALLATION»(/acura/tl/iii-2003-2006/remont/exhaust/#intake-manifold-and-exhaust-system) ).

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