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Variable Valve Timing and Lift Electronic Control (vtec) with Vtc Acura TSX I

Testing & Diagnostics 32 illustrations ~6712 words

Scheme 229

Scheme 229: Component Location Index
Scheme 229: Component Location Index

DTC P0010: VTC Oil Control Solenoid Valve Malfunction

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

Scheme 230

Scheme 230: DTC P0010: VTC Oil Control Solenoid Valve Malfunction
Scheme 230: DTC P0010: VTC Oil Control Solenoid Valve Malfunction

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Scheme 234
  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 VTC TEST in the INSPECTION MENU with the HDS.
  5. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0010 indicated? YES -Go to step 6. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM.
  6. Turn the ignition switch OFF.
  7. Disconnect the VTC oil control solenoid valve 2P connector.
  8. At the solenoid valve side, measure resistance between VTC oil control solenoid valve 2P connector terminals No. 1 and No. 2. Is there 6.75-8.25 ohms at room temperature? YES -Go to step 9. NO -Go to step 15 .
  9. Check for continuity between VTC oil control solenoid valve 2P connector terminal No. 1 and body ground. Is there continuity? YES -Go to step 10. NO -Repair open in the wire between the VTC oil control solenoid valve and G101, then go to step 16 .
  10. Jump the SCS line with the HDS.
  11. Disconnect ECM/PCM connector B (24P).
  12. Check for continuity between ECM/PCM connector terminal B1 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (B1) and the VTC oil control solenoid valve, then go to step 16 . NO -Go to step 13.
  13. Connect VTC oil control solenoid valve 2P connector terminal No. 2 to body ground with a jumper wire.
  14. Check for continuity between ECM/PCM connector terminal B1 and body ground. Is there continuity? YES -Go to step 23 . NO -Repair open in the wire between the ECM/PCM (B1) and the VTC oil control solenoid valve, then go to step 16 .
  15. Replace the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ).
  16. Reconnect all connectors.
  17. Turn the ignition switch ON (II).
  18. Reset the ECM/PCM with the HDS.
  19. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  20. Do the VTC TEST in the INSPECTION MENU with the HDS.
  21. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0010 indicated? YES -Check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM, then go to step 1 . NO -Go to step 22.
  22. Monitor the OBD STATUS for DTC P0010 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 21 , go to the indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 20 .
  23. Reconnect all connectors.
  24. Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
  25. Do the VTC TEST in the INSPECTION MENU with the HDS.
  26. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0010 indicated? YES -Check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 25 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 27.
  27. Monitor the OBD STATUS for DTC P0010 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «'04-05 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 26 , go to the indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 25 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 25 .

DTC P0011: VTC System Malfunction

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

Scheme 235

Scheme 235: DTC P0011: VTC System Malfunction
Scheme 235: DTC P0011: VTC System Malfunction
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine.
  4. Watch the low oil pressure indicator with the engine running. Is the low oil pressure indicator on? YES -Check the oil pressure (see «OIL PRESSURE TEST»(/acura/tsx/i-2003-2008/remont/lubrication-system/#engine-lubrication-system__oil-pressure-test) ), then go to step 15 . NO -Go to step 5.
  5. Do the VTC TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Go to step 6. NO -Go to step 9 .
  6. Test-drive at a steady speed between 19-38 mph (30-60 km/h) for 10 minutes.
  7. Check the VTC STATUS in the DATA LIST with the HDS. Does it indicate ON? YES -Go to step 8. NO -Go to step 6 and recheck.
  8. Monitor the OBD STATUS for DTC P0011 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 9. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. If the screen indicates NOT COMPLETED, go to step 5 and recheck.
  9. Turn the ignition switch OFF.
  10. Remove the power steering pump (see «PUMP REPLACEMENT»(/acura/tsx/i-2003-2008/remont/manual-power-steering/#power-steering-system) ) and the auto-tensioner (see «DRIVE BELT AUTO-TENSIONER REPLACEMENT»(/acura/tsx/i-2003-2008/remont/charging-system/#charging-system) ).
  11. Remove the VTC strainer (A), and check it for clogging. Is the strainer OK? YES -Go to step 12. NO -Clean the VTC strainer, replace the engine oil filter and the engine oil, then go to step 14 .
  12. Test the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ). Is the VTC oil control solenoid valve OK? YES -Go to step 13. NO -Replace the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 14 .
  13. Inspect the VTC actuator (see «VTC ACTUATOR INSPECTION»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head) ). Is the VTC actuator OK? YES -Check the VTC system oil passages, then go to step 14. NO -Replace the VTC actuator (see «VTC ACTUATOR, EXHAUST CAMSHAFT SPROCKET REPLACEMENT»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head) ), then go to step 14.
  14. Turn the ignition switch ON (II).
  15. Reset the ECM/PCM with the HDS.
  16. Clear the CKP pattern with the HDS.
  17. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  18. Do the CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).
  19. Do the VTC TEST in the INSPECTION MENU with the HDS.
  20. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0011 indicated? YES -Check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM, then go to step 1 . NO -Go to step 21.
  21. Monitor the OBD STATUS for DTC P0011 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 20 , go to the indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 19 .

DTC P0340: CMP Sensor A No Signal

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

Scheme 236

Scheme 236: DTC P0340: CMP Sensor A No Signal
Scheme 236: DTC P0340: CMP Sensor A No Signal

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  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine.
  4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0340 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at CMP sensor A and the ECM/PCM.
  5. Turn the ignition switch OFF.
  6. Disconnect the CMP sensor A 3P connector.
  7. Turn the ignition switch ON (II).
  8. Measure voltage between CMP sensor A 3P connector terminal No. 3 and body ground. Is there battery voltage? YES -Go to step 9. NO -Repair open in the wire between the No. 18 ACC (15 A) fuse in the under-dash fuse/relay box and CMP sensor A, then go to step 18 .
  9. Measure voltage between CMP sensor A 3P connector terminal No. 1 and body ground. Is there about 5 V? YES -Go to step 10. NO -Go to step 11 .
  10. Measure voltage between CMP sensor A 3P connector terminals No. 2 and No. 3. Is there battery voltage? YES -Go to step 16 . NO -Repair open in the wire between CMP sensor A and G101, then go to step 18 .
  11. Measure voltage between ECM/PCM connector terminal A19 and body ground. Is there about 5 V? YES -Repair open in the wire between the ECM/PCM (A19) and CMP sensor A, then go to step 18 . NO -Go to step 12.
  12. Turn the ignition switch OFF.
  13. Jump the SCS line with the HDS.
  14. Disconnect ECM/PCM connector A (31P).
  15. Check for continuity between ECM/PCM connector terminal A19 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A19) and CMP sensor A, then go to step 18 . NO -Go to step 23 .
  16. Turn the ignition switch OFF.
  17. Replace CMP sensor A (see «CMP SENSOR A REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ).
  18. Reconnect all connectors.
  19. Turn the ignition switch ON (II).
  20. Reset the ECM/PCM with the HDS.
  21. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  22. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0340 indicated? YES -Check for poor connections or loose terminals at CMP sensor A and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
  23. Reconnect all connectors.
  24. Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
  25. Start the engine, and let it idle.
  26. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0340 indicated? YES -Check for poor connections or loose terminals at CMP sensor A and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 25 . If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «'04-05 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTC's are indicated, go to the indicated DTC's troubleshooting.

DTC P0341: CMP Sensor A and CKP Sensor Incorrect Phase Detected

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If DTC P1009 is stored at the same time as DTC P0341, troubleshoot DTC P1009 first, then recheck for DTC P0341.

  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Test-drive at a steady speed between 19-38 mph (30-60 km/h) for 10 minutes.
  4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0341 indicated? YES -Go to step 9 . NO -Go to step 5.
  5. Do the VTC TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Go to step 6. NO -Go to step 9 .
  6. Test-drive at a steady speed between 19-38 mph (30-60 km/h) for 10 minutes.
  7. Check the VTC STATUS in the DATA LIST with the HDS. Does it indicate ON? YES -Go to step 8. NO -Go to step 6 and recheck.
  8. Monitor the OBD STATUS for DTC P0341 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 9. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM. If the screen indicates NOT COMPLETED, go to step 6 and recheck.
  9. Turn the ignition switch OFF.
  10. Test the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ). Is the VTC oil control solenoid valve OK? YES -Go to step 11. NO -Replace the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 14 .
  11. Check the camshaft timing (see «CAM CHAIN INSTALLATION»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head__cam-chain-installation) ). Is the camshaft timing OK? YES -Go to step 12. NO -Reset the camshaft timing (see «CAM CHAIN INSTALLATION»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head__cam-chain-installation) ), then go to step 14 .
  12. Check for damage or stretch at the cam chain (see «CAM CHAIN INSPECTION»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head) ). Is the cam chain damaged or stretched? YES -Replace the cam chain and tensioner (see «CAM CHAIN REMOVAL»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head__cam-chain-removal) ), then go to step 14 . NO -Go to step 13.
  13. Inspect the VTC actuator (see «VTC ACTUATOR INSPECTION»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head) ). Is the actuator OK? YES -Go to step 14. NO -Replace the VTC actuator (see «VTC ACTUATOR, EXHAUST CAMSHAFT SPROCKET REPLACEMENT»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head) ), then go to step 14.
  14. Turn the ignition switch ON (II).
  15. Reset the ECM/PCM with the HDS.
  16. Clear the CKP pattern with the HDS.
  17. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  18. Do the CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).
  19. Test-drive at a steady speed between 19-38 mph (30-60 km/h) for 10 minutes.
  20. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0341 indicated? YES -Check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM, then go to step 1 . NO -Go to step 21.
  21. Monitor the OBD STATUS for DTC P0341 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 20 , go to the indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the VTC oil control solenoid valve and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 19 .

DTC P0344: CMP Sensor A Circuit Intermittent Interruption

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, and let it idle for 10 seconds.
  4. Check the CMP A NOISE in the DATA LIST with the HDS. Are 0 counts indicated? YES -Go to step 7 . NO -Go to step 5.
  5. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS
  6. Check the CMP A NOISE in the DATA LIST with the HDS. Are 0 counts indicated? YES -Go to step 7. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at CMP sensor A and the ECM/PCM.
  7. Check for poor or loose connections and terminals at these locations: CMP sensor A ECM/PCM Engine ground Body ground Are the connections and terminals OK? YES -Go to step 8. NO -Repair the connectors or terminals, then go to step 11 .
  8. Check for damage on the CMP sensor A pulse plate (see «CMP PULSE PLATE A REPLACEMENT»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head) ). Is the pulse plate damaged? YES -Replace the CMP sensor A pulse plate (see «CMP PULSE PLATE A REPLACEMENT»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head) ), then go to step 11 . NO -Go to step 9.
  9. Turn the ignition switch OFF.
  10. Replace CMP sensor A (see «CMP SENSOR A REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ).
  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/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  14. Start the engine, and let it idle for 10 seconds.
  15. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0344 indicated? YES -Check for poor connections or loose terminals at CMP sensor A and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

DTC P1009: VTC Advance Malfunction ('05-07 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If DTC P0341 is stored at the same time as DTC P1009, troubleshoot DTC P1009 first, then recheck for DTC P0341.

Scheme 241

Scheme 241: DTC P1009: VTC Advance Malfunction ('05-07 models)
Scheme 241: DTC P1009: VTC Advance Malfunction ('05-07 models)
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine.
  4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P1009 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time.
  5. Turn the ignition switch OFF.
  6. Remove the power steering pump (see «PUMP REPLACEMENT»(/acura/tsx/i-2003-2008/remont/manual-power-steering/#power-steering-system) ) and auto-tensioner (see «DRIVE BELT AUTO-TENSIONER REPLACEMENT»(/acura/tsx/i-2003-2008/remont/charging-system/#charging-system) ).
  7. Remove the VTC strainer (A), and check it for clogging. Is the strainer OK? YES -Go to step 8. NO -Clean the VTC strainer, replace the engine oil filter and the engine oil, then go to step 10 .
  8. Test the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ). Is the valve OK? YES -Go to step 9. NO -Replace the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 10 .
  9. Inspect the VTC actuator (see «VTC ACTUATOR INSPECTION»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head) ). Is the actuator OK? YES -Check the VTC system oil passages, then go to step 10. NO -Replace the VTC actuator (see «VTC ACTUATOR, EXHAUST CAMSHAFT SPROCKET REPLACEMENT»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head) ), then go to step 10.
  10. Turn the ignition switch ON (II).
  11. Reset the ECM/PCM with the HDS.
  12. Clear the CKP pattern with the HDS.
  13. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  14. Do the CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).
  15. Check for Temporary DTCs or DTCs with the HDS. Is DTC P1009 indicated? YES -Check the oil passages for the VTC system, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

DTC P2646: Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit Low Voltage

Special Tools Required

  1. Pressure gauge adapter 07NAJ-P07010A
  2. A/T low pressure gauge w/panel 07406-0070301
  3. A/T pressure hose 07406-0020201
  4. A/T pressure hose, 2,210 mm 07MAJ-PY4011A
  5. A/T pressure adapter 07MAJ-PY40120
  6. Oil pressure hose 07ZAJ-S5AA200

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

Scheme 242

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Scheme 243
  1. Check the engine oil level. Is the level OK? YES -Go to step 2. NO -Adjust the engine oil to the proper level, then go to step 19 .
  2. Turn the ignition switch ON (II).
  3. Clear the DTC with the HDS.
  4. Do the VTEC TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the rocker arm oil pressure switch (VTEC oil pressure switch), the rocker arm oil control solenoid (VTEC solenoid valve), and the ECM/PCM. NO -Go to step 5.
  5. Turn the ignition switch OFF.
  6. Disconnect the rocker arm oil pressure switch (VTEC oil pressure switch) 2P connector.
  7. Turn the ignition switch ON (II).
  8. Check the VTEC PRES SW in the DATA LIST with the HDS. Is SWITCH ON indicated? YES -Go to step 15 . NO -Go to step 9.
  9. Turn the ignition switch OFF.
  10. Remove the rocker arm oil pressure switch (VTEC oil pressure switch) (A) and install the special tools as shown, then install the rocker arm oil pressure switch (VTEC oil pressure switch) to the oil pressure gauge adapter (B). NOTE: Install the parts in the reverse order of removal with a new O-ring.
  11. Start the engine.
  12. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  13. Check the VTEC oil pressure. Does the oil pressure increase to at least 392 kPa (56.9 psi, 4.0 kgf/cm 2 )? YES -Replace the rocker arm oil pressure switch (VTEC oil pressure switch) (see «ROCKER ARM OIL PRESSURE SWITCH (VTEC OIL PRESSURE SWITCH) REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 19 . NO -Go to step 14.
  14. Check the engine oil pressure (see «OIL PRESSURE TEST»(/acura/tsx/i-2003-2008/remont/lubrication-system/#engine-lubrication-system__oil-pressure-test) ). Is the engine oil pressure OK? YES -Replace the rocker arm oil control solenoid (VTEC solenoid valve) (see «ROCKER ARM OIL CONTROL VALVE (VTEC SOLENOID VALVE) REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 19 . NO -Repair the cause of the low oil pressure, and replace the rocker arm oil control solenoid (VTEC solenoid valve) (see «ROCKER ARM OIL CONTROL VALVE (VTEC SOLENOID VALVE) REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 19 .
  15. Turn the ignition switch OFF.
  16. Jump the SCS line with the HDS.
  17. Disconnect ECM/PCM connector B (24P).
  18. Check for continuity between ECM/PCM connector terminal B11 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (B11) and the rocker arm oil pressure switch (VTEC oil pressure switch), then go to step 19. NO -Go to step 26 .
  19. Reconnect all connectors.
  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/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  23. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  24. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2646 indicated ? YES -Check for poor connections or loose terminals at the rocker arm oil pressure switch (VTEC oil pressure switch), the rocker arm oil control solenoid (VTEC solenoid valve), and the ECM/PCM, then go to step 1 . NO -Go to step 25.
  25. Monitor the OBD STATUS for DTC P2646 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 24 , go to the indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the rocker arm oil pressure switch (VTEC oil pressure switch), the rocker arm oil control solenoid (VTEC solenoid valve) and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 23 .
  26. Reconnect all connectors.
  27. Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
  28. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  29. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2646 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil pressure switch (VTEC oil pressure switch), the rocker arm oil control solenoid (VTEC solenoid valve), and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 28 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 30.
  30. Monitor the OBD STATUS for DTC P2646 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «'04-05 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 29 , go to indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the rocker arm oil pressure switch (VTEC oil pressure switch), the rocker arm oil control solenoid (VTEC solenoid valve), and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 28 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 28 .

DTC P2647: Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit High Voltage

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

Scheme 244

Scheme 244: DTC P2647: Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit High Voltage
Scheme 244: DTC P2647: Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit High Voltage

Scheme 245

Scheme 245
Scheme 245

Scheme 246

Scheme 246
Scheme 246
  1. Check the engine oil level. Is the level OK? YES -Go to step 2. NO -Adjust the engine oil to the proper level, then go to step 14 .
  2. Turn the ignition switch ON (II).
  3. Clear the DTC with the HDS.
  4. Do the VTEC TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the rocker arm oil pressure switch (VTEC oil pressure switch) and the ECM/PCM. NO -Go to step 5.
  5. Check the result of step 4 . VTEC Switch Failure VTEC Switch Open VTEC Switch SIG Line Open VTEC Switch GND Line Open Is the test result any of the above? YES -Go to step 6. NO -Check for poor connections or loose terminals at the rocker arm oil pressure switch (VTEC oil pressure switch). If it is OK, replace the rocker arm oil control valve (VTEC solenoid valve) (see «ROCKER ARM OIL CONTROL VALVE (VTEC SOLENOID VALVE) REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 14 .
  6. Turn the ignition switch OFF.
  7. Disconnect the rocker arm oil pressure switch (VTEC oil pressure switch) 2P connector.
  8. At the rocker arm oil pressure switch (VTEC oil pressure switch) side, check for continuity between rocker arm oil pressure switch (VTEC oil pressure switch) 2P connector terminals No. 1 and No. 2. Is there continuity? YES -Go to step 9. NO -Replace the rocker arm oil pressure switch (VTEC oil pressure switch) (see «ROCKER ARM OIL PRESSURE SWITCH (VTEC OIL PRESSURE SWITCH) REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 13 .
  9. Turn the ignition switch ON (II).
  10. Measure voltage between rocker arm oil pressure switch (VTEC oil pressure switch) 2P connector terminal No. 1 and body ground. Is there battery voltage? YES -Repair open in the wire between the rocker arm oil pressure switch (VTEC oil pressure switch) and G101, then go to step 13 . NO -Go to step 11.
  11. Measure voltage between ECM/PCM connector terminal B11 and body ground. Is there battery voltage? YES -Repair open in the wire between the ECM/PCM (B11) and the rocker arm oil pressure switch (VTEC oil pressure switch), then go to step 12. NO -Go to step 19 .
  12. Turn the ignition switch OFF.
  13. Reconnect the rocker arm oil pressure switch (VTEC oil pressure switch) 2P connector.
  14. Turn the ignition switch ON (II).
  15. Reset the ECM/PCM with the HDS.
  16. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  17. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2647 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil pressure switch (VTEC oil pressure switch) and the ECM/PCM, then go to step 1 . NO -Go to step 18.
  18. Monitor the OBD STATUS for DTC P2647 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 17 , go to the indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the rocker arm oil pressure switch (VTEC oil pressure switch) and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
  19. Turn the ignition switch OFF.
  20. Reconnect all connectors.
  21. Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
  22. Start the engine, and let it idle.
  23. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2647 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil pressure switch (VTEC oil pressure switch) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 22 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 24.
  24. Monitor the OBD STATUS for DTC P2647 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «'04-05 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 23 , go to indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the rocker arm oil pressure switch (VTEC oil pressure switch), and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 22 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P2648: Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit Low Voltage

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

Scheme 247

Scheme 247: DTC P2648: Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit Low Voltage
Scheme 247: DTC P2648: Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit Low Voltage

Scheme 248

Scheme 248
Scheme 248
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Do the VTEC TEST in the INSPECTION MENU with the HDS. Is the result OK? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the rocker arm oil control solenoid (VTEC solenoid valve) and the ECM/PCM. NO -Go to step 4.
  4. Turn the ignition switch OFF.
  5. Disconnect the rocker arm oil control solenoid (VTEC solenoid valve) 2P connector.
  6. At the solenoid side, measure resistance between rocker arm oil control solenoid (VTEC solenoid valve) 2P connector terminals No. 1 and No. 2. Is there 14-30 ohms at room temperature? YES -Go to step 7. NO -Go to step 10 .
  7. Jump the SCS line with the HDS.
  8. Disconnect ECM/PCM connector B (24P).
  9. Check for continuity between ECM/PCM connector terminal B6 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (B6) and the rocker arm oil control solenoid (VTEC solenoid valve), then go to step 11 . NO -Go to step 18 .
  10. Replace the rocker arm oil control valve (VTEC solenoid valve) (see «ROCKER ARM OIL CONTROL VALVE (VTEC SOLENOID VALVE) REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ).
  11. Reconnect all connectors.
  12. Turn the ignition switch ON (II).
  13. Reset the ECM/PCM with the HDS.
  14. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  15. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  16. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2648 Indicated? YES -Check for poor connections or loose terminals at the rocker arm oil control solenoid (VTEC solenoid valve) and the ECM/PCM, then go to step 1 . NO -Go to step 17.
  17. Monitor the OBD STATUS for DTC P2648 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 16 , go to the indicated DTCs troubleshooting. NO -If the screen indicates FAILED, go to step 1 . If the screen indicates NOT COMPLETED, go to step 15 .
  18. Reconnect all connectors.
  19. Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
  20. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  21. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2648 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil control solenoid (VTEC solenoid valve) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 20 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 22.
  22. Monitor the OBD STATUS for DTC P2648 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «'04-05 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 21 , go to indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the rocker arm oil control solenoid (VTEC solenoid valve), and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 20 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 20 .

DTC P2649: Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit High Voltage

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

Scheme 249

Scheme 249: DTC P2649: Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit High Voltage
Scheme 249: DTC P2649: Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit High Voltage

Scheme 250

Scheme 250
Scheme 250

Scheme 251

Scheme 251
Scheme 251

Scheme 252

Scheme 252
Scheme 252
  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. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2649 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the rocker arm oil control solenoid (VTEC solenoid valve) and the ECM/PCM.
  5. Turn the ignition switch OFF.
  6. Disconnect the rocker arm oil control solenoid (VTEC solenoid valve) 2P connector.
  7. At the solenoid side, measure resistance between rocker arm oil control solenoid (VTEC solenoid valve) 2P connector terminals No. 1 and No. 2. Is there 14-30 ohms at room temperature? YES -Go. to step 8. NO -Go to step 13 .
  8. Check for continuity between rocker arm oil control solenoid (VTEC solenoid valve) 2P connector terminal No. 1 and body grounds. Is there continuity? YES -Go to step 9. NO -Repair open in the wire between the rocker arm oil control solenoid (VTEC solenoid valve) and G101, then go to step 14 .
  9. Jump the SCS line with the HDS.
  10. Disconnect ECM/PCM connector B (24P).
  11. Connect rocker arm oil control solenoid (VTEC solenoid valve) 2P connector terminal No. 2 to body ground with a jumper wire.
  12. Check for continuity between ECM/PCM connector terminal B6 and body ground. Is there continuity? YES -Go to step 20 . NO -Repair open in the wire between the ECM/PCM (B6) and the rocker arm oil control solenoid (VTEC solenoid valve), then go to step 14 .
  13. Replace the rocker arm oil control valve (VTEC solenoid valve) (see «ROCKER ARM OIL CONTROL VALVE (VTEC SOLENOID VALVE) REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ).
  14. Reconnect all connectors.
  15. Turn the ignition switch ON (II).
  16. Reset the ECM/PCM with the HDS.
  17. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
  18. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2649 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil control solenoid (VTEC solenoid valve) and the ECM/PCM, then go to step 1 . NO -Go to step 19.
  19. Monitor the OBD STATUS for DTC P2649 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 18 , go to the indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at rocker arm oil control solenoid (VTEC solenoid valve) and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
  20. Reconnect all connectors.
  21. Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
  22. Start the engine, and let it idle.
  23. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2649 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil control solenoid (VTEC solenoid valve) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 22 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 24.
  24. Monitor the OBD STATUS for DTC P2649 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «'04-05 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 23 , go to the indicated DTCs troubleshooting. NO -If the screen indicates FAILED, check for poor connections or loose terminals at the rocker arm control solenoid (VTEC solenoid valve) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 22 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

Scheme 253

Scheme 253: VTC Oil Control Solenoid Valve Removal/Test/Installation
Scheme 253: VTC Oil Control Solenoid Valve Removal/Test/Installation

Scheme 254

Scheme 254
Scheme 254

Scheme 255

Scheme 255
Scheme 255

Scheme 256

Scheme 256
Scheme 256

Scheme 257

Scheme 257
Scheme 257
  1. Disconnect the VTC oil control solenoid valve 2P connector (A).
  2. Remove the bolt (B) and the VTC oil control solenoid valve (C).
  3. Check the VTC oil control solenoid valve for sticking and the solenoid valve filter for clogging. If the valve is stuck or clogged, replace the VTC oil control solenoid valve.
  4. Check clearance between the port (advance side) and the valve. Make sure the valves (A) closes fully. Closed
  5. Connect the battery positive terminal to VTC oil control solenoid valve 2P connector terminal No. 2.
  6. Connect the battery negative terminal to VTC oil control solenoid valve 2P connector terminal No. 1. Clearance (A) should be at least 1.2 mm (0.05 in.). If the valve does not open, replace it, then go to step 7. Open
  7. Remove the VTC valve O-rings (A).
  8. Coat a new O-ring with engine oil, then install it on the valve.
  9. Clean and dry the mating surface of the valve.
  10. Install the valve. NOTE: Do not install the valve while wearing fibrous cloth gloves. Be careful not to contaminate the cylinder head opening.

Scheme 258

Scheme 258: CMP Sensor A Replacement
Scheme 258: CMP Sensor A Replacement
  1. Remove the air cleaner (see «AIR CLEANER REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/mechanical/#intake-air-system) ).
  2. Disconnect the CMP sensor A 3P connector (A).
  3. Remove the bolt (B).
  4. Remove CMP sensor A (C) from the intake camshaft side of the cylinder head.
  5. Install the parts in the reverse order of removal with a new O-ring (D).

Scheme 259

Scheme 259: Rocker Arm Oil Control Valve (VTEC Solenoid Valve) Removal/Installation
Scheme 259: Rocker Arm Oil Control Valve (VTEC Solenoid Valve) Removal/Installation
  1. Disconnect the rocker arm oil control solenoid (VTEC solenoid valve) 2P connector (A) and the rocker arm oil pressure switch (VTEC oil pressure switch) 2P connector (B).
  2. Remove the bolts (C).
  3. Remove the rocker arm oil control valve (VTEC solenoid valve) (D).
  4. Install the parts in the reverse order of removal with a new solenoid valve filter (E).

Scheme 260

Scheme 260: Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Removal/Installation
Scheme 260: Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Removal/Installation
  1. Remove the rocker arm oil control solenoid (VTEC solenoid valve) assembly (see «ROCKER ARM OIL CONTROL VALVE (VTEC SOLENOID VALVE) REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ).
  2. Remove the cover (A).
  3. Remove the rocker arm oil pressure switch (VTEC oil pressure switch) (B).
  4. Install the parts in the reverse order of removal with a new O-ring (C).

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