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Contents Section: Mechanical All sections

Vtec/vtc Acura RDX I рестайлинг

Mechanical 28 illustrations ~6206 words

Scheme 309

Scheme 309: Component Location Index
Scheme 309: 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 310

Scheme 310: DTC P0010: VTC Oil Control Solenoid Valve Malfunction
Scheme 310: DTC P0010: VTC Oil Control Solenoid Valve Malfunction

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Scheme 313
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3, 000 RPM without load (in P or N) 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 Pending or Confirmed 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 PCM.
  6. Turn the ignition switch to LOCK (0).
  7. Disconnect the VTC oil control solenoid valve 2P connector.
  8. At the solenoid side, measure the 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 (about 68°F, 20°C)? YES -Go to step 9. NO -Go to step 14 .
  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 an open in the wire between the VTC oil control solenoid valve and G101 (see «CONNECTOR TO FUSE/RELAY BOX INDEX»(/acura/rdx/i-2009-2012/remont/body-electrical/#fuserelay-boxes__connector-to-fuserelay-box-index) ), then go to step 15 .
  10. Jump the SCS line with the HDS.
  11. Disconnect PCM connector C (44P).
  12. Check for continuity between PCM connector terminal C23 and body ground. Is there continuity? YES -Repair a short in the wire between the PCM (C23) and the VTC oil control solenoid valve, then go to step 15 . NO -Go to step 13.
  13. Check for continuity between PCM connector terminal C23 and VTC oil control solenoid valve 2P connector terminal No. 2. Is there continuity? YES -Go to step 22 . NO -Repair an open in the wire between the PCM (C23) and the VTC oil control solenoid valve, then go to step 15 .
  14. Replace the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ).
  15. Reconnect all connectors.
  16. Turn the ignition switch to ON (II).
  17. Reset the PCM with the HDS.
  18. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
  19. Do the VTC TEST in the INSPECTION MENU with the HDS.
  20. Check for Pending or Confirmed 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 PCM, then go to step 1 . NO -Go to step 21.
  21. Monitor the OBD STATUS for DTC P0010 in the DTCs MENU with the HDS. Does the HDS indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 20 , go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) . NO -If the HDS indicates FAILED, check for poor connections or loose terminals at the VTC oil control solenoid valve and the PCM, then go to step 1 . If the HDS indicates NOT COMPLETED, go to step 19 .
  22. Reconnect all connectors.
  23. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
  24. Do the VTC TEST in the INSPECTION MENU with the HDS.
  25. Check for Pending or Confirmed 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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 24 . If the PCM was substituted, go to step 1 . NO -Go to step 26.
  26. Monitor the OBD STATUS for DTC P0010 in the DTCs MENU with the HDS. Does the HDS indicate PASSED? YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). If any other Pending or Confirmed DTCs were indicated in step 25 , go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) . NO -If the HDS indicates FAILED, check for poor connections or loose terminals at the VTC oil control solenoid valve and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 24 . If the PCM was substituted, go to step 1 . If the HDS indicates NOT COMPLETED, go to step 24 .

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 314

Scheme 314: DTC P0011: VTC System Malfunction
Scheme 314: DTC P0011: VTC System Malfunction
  1. Turn the ignition switch to 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/rdx/i-2009-2012/remont/lubrication-system/#engine-lubrication__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 25-75 mph (40-120 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 HDS indicate FAILED? YES -Go to step 9. NO -If the HDS indicates PASSED, intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, go to step 5 and recheck.
  9. Turn the ignition switch to LOCK (0).
  10. Remove the drive belt auto-tensioner (see «DRIVE BELT AUTO-TENSIONER REMOVAL/INSTALLATION»(/acura/rdx/i-2009-2012/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/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ). 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/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ), then go to step 14 .
  13. Inspect the VTC actuator (see «VTC ACTUATOR INSPECTION»(/acura/rdx/i-2009-2012/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 «CMP PULSE PLATE B REPLACEMENT»(/acura/rdx/i-2009-2012/remont/mechanical/#cylinder-head) ), then go to step 14.
  14. Turn the ignition switch to ON (II).
  15. Reset the PCM with the HDS.
  16. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
  17. Do the CKP pattern clear/CKP pattern learn procedure (see «CKP PATTERN CLEAR/CKP PATTERN LEARN»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems) ).
  18. Do the VTC TEST in the INSPECTION MENU with the HDS.
  19. Check for Pending or Confirmed 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 PCM, then go to step 1 . NO -Go to step 20.
  20. Monitor the OBD STATUS for DTC P0011 in the DTCs MENU with the HDS. Does the HDS indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 19 , go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) . NO -If the HDS indicates FAILED, check for poor connections or loose terminals at the VTC oil control solenoid valve and the PCM, then go to step 1 . If the HDS indicates NOT COMPLETED, go to step 18 .

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 315

Scheme 315: DTC P0340: CMP Sensor A No Signal
Scheme 315: DTC P0340: CMP Sensor A No Signal

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Scheme 319
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine.
  4. Check for Pending or Confirmed 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 PCM.
  5. Turn the ignition switch to LOCK (0).
  6. Disconnect the CMP sensor A 3P connector.
  7. Turn the ignition switch to ON (II).
  8. Measure the voltage between CMP sensor A 3P connector terminal No. 3 and body ground. Is there battery voltage? YES -Go to step 9. NO -Repair an open in the wire between CMP sensor A and the No. 3 IG1 ACG (15 A) fuse, then go to step 18 .
  9. Measure the 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 the voltage between CMP sensor A 3P connector terminals No. 2 and No. 3. Is there battery voltage? YES -Go to step 16 . NO -Repair an open in the wire between CMP sensor A and G101 (see «CONNECTOR TO FUSE/RELAY BOX INDEX»(/acura/rdx/i-2009-2012/remont/body-electrical/#fuserelay-boxes__connector-to-fuserelay-box-index) ), then go to step 18 .
  11. Turn the ignition switch to LOCK (0).
  12. Jump the SCS line with the HDS.
  13. Disconnect PCM connector C (44P).
  14. Check for continuity between PCM connector terminal C41 and body ground. Is there continuity? YES -Repair a short in the wire between the PCM (C41) and CMP sensor A, then go to step 18 . NO -Go to step 15.
  15. Check for continuity between PCM connector terminal C41 and CMP sensor A 3P connector terminal No. 1. Is there continuity? YES -Go to step 23 . NO -Repair an open in the wire between the PCM (C41) and CMP sensor A, then go to step 18 .
  16. Turn the ignition switch to LOCK (0).
  17. Replace CMP sensor A (see «CMP SENSOR A REPLACEMENT»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ).
  18. Reconnect all connectors.
  19. Turn the ignition switch to ON (II).
  20. Reset the PCM with the HDS.
  21. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
  22. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0340 indicated? YES -Check for poor connections or loose terminals at CMP sensor A and the PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) .
  23. Reconnect all connectors.
  24. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
  25. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0340 indicated? YES -Check for poor connections or loose terminals at CMP sensor A and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) .

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 ).

  1. Turn the ignition switch to 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 Pending or Confirmed 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 HDS indicate FAILED? YES -Go to step 9. NO -If the HDS 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 PCM. If the HDS indicates NOT COMPLETED, go to step 6 and recheck.
  9. Turn the ignition switch to LOCK (0).
  10. Test the VTC oil control solenoid valve (see «VTC OIL CONTROL SOLENOID VALVE REMOVAL/TEST/INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ). 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/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ), then go to step 14 .
  11. Check the camshaft timing (see step 6 under «CAM CHAIN REMOVAL»(/acura/rdx/i-2009-2012/remont/mechanical/#cylinder-head__cam-chain-removal) ). Is the camshaft timing OK? YES -Go to step 12. NO -Reset the camshaft timing (see step 6 under «CAM CHAIN REMOVAL»(/acura/rdx/i-2009-2012/remont/mechanical/#cylinder-head__cam-chain-removal) ), then go to step 14 .
  12. Check for damage or stretch at the cam chain (see «CAM CHAIN CASE OIL SEAL INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#cylinder-head__cam-chain-case-oil-seal-installation) ). Is the cam chain damaged? YES -Replace the cam chain and auto-tensioner (see «CAM CHAIN AUTO-TENSIONER REMOVAL AND INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#cylinder-head) ), then go to step 14 . NO -Go to step 13.
  13. Inspect the VTC actuator (see «VTC ACTUATOR INSPECTION»(/acura/rdx/i-2009-2012/remont/mechanical/#cylinder-head) ). Is the actuator OK? YES -Go to step 14. NO -Replace the VTC actuator (see «CMP PULSE PLATE B REPLACEMENT»(/acura/rdx/i-2009-2012/remont/mechanical/#cylinder-head) ), then go to step 14.
  14. Turn the ignition switch to ON (II).
  15. Reset the PCM with the HDS.
  16. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
  17. Do the CKP pattern clear/CKP pattern learn procedure (see «CKP PATTERN CLEAR/CKP PATTERN LEARN»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems) ).
  18. Test-drive at a steady speed between 19-38 mph (30-60 km/h) for 10 minutes.
  19. Check for Pending or Confirmed 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 PCM, then go to step 1 . NO -Go to step 20.
  20. Monitor the OBD STATUS for DTC P0341 in the DTCs MENU with the HDS. Does the HDS indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 19 , go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) . NO -If the HDS indicates FAILED, check for poor connections or loose terminals at the VTC oil control solenoid valve and the PCM, then go to step 1 . If the HDS indicates NOT COMPLETED, go to step 18 .

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 to 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 VEHICLE SPEED
  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 PCM.
  7. Check for poor or loose connections and terminals at these locations: CMP sensor A PCM Engine ground Body ground Are the connections and terminals OK? YES -Go to step 8. NO -Repair the connections or terminals, then go to step 11 .
  8. Check for damage on the CMP pulse plate A (see «CMP PULSE PLATE A REPLACEMENT»(/acura/rdx/i-2009-2012/remont/mechanical/#cylinder-head) ). Is the pulse plate damaged? YES -Replace the CMP pulse plate A (see «CMP PULSE PLATE A REPLACEMENT»(/acura/rdx/i-2009-2012/remont/mechanical/#cylinder-head) ), then go to step 11 . NO -Go to step 9.
  9. Turn the ignition switch to LOCK (0).
  10. Replace CMP sensor A (see «CMP SENSOR A REPLACEMENT»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ).
  11. Turn the ignition switch to ON (II).
  12. Reset the PCM with the HDS.
  13. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
  14. Start the engine, and let it idle for 10 seconds.
  15. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0344 indicated? YES -Check for poor connections or loose terminals at CMP sensor A and the PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) .

DTC P1009: VTC Advance Malfunction

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 320

Scheme 320: DTC P1009: VTC Advance Malfunction
Scheme 320: DTC P1009: VTC Advance Malfunction
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine.
  4. Check for Pending or Confirmed 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 to LOCK (0).
  6. Remove the drive belt auto-tensioner (see «DRIVE BELT AUTO-TENSIONER REMOVAL/INSTALLATION»(/acura/rdx/i-2009-2012/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/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ). 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/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ), then go to step 10 .
  9. Inspect the VTC actuator (see «VTC ACTUATOR INSPECTION»(/acura/rdx/i-2009-2012/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 «CMP PULSE PLATE B REPLACEMENT»(/acura/rdx/i-2009-2012/remont/mechanical/#cylinder-head) ), then go to step 10.
  10. Turn the ignition switch to ON (II).
  11. Reset the PCM with the HDS.
  12. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
  13. Do the CKP pattern clear/CKP pattern learn procedure (see «CKP PATTERN CLEAR/CKP PATTERN LEARN»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems) ).
  14. Check for Pending or Confirmed DTCs with the HDS. Is DTC P1009 indicated? YES -Check the oil passages at the VTC system, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) .

DTC P2646: Rocker Arm 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 Test Hose 07AAJ-PY4A100
  4. A/T Pressure Adapter 07MAJ-PY40120
  5. 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 ).

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Scheme 322
  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 20 .
  2. Turn the ignition switch to 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, the rocker arm oil control solenoid, and the PCM. NO -Go to step 5.
  5. Turn the ignition switch to LOCK (0).
  6. Disconnect the rocker arm oil pressure switch 2P connector.
  7. Turn the ignition switch to ON (II).
  8. Check the VTEC PRESS SW in the DATA LIST with the HDS. Is ON indicated? YES -Go to step 16 . NO -Go to step 9.
  9. Turn the ignition switch to LOCK (0).
  10. Remove the charge air cooler cover (see step 1 under «CHARGE AIR COOLER REMOVAL AND INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#intake-manifold-and-exhaust-system) ).
  11. Remove the rocker arm oil pressure switch (A), and attach the special tools as shown in illustration, then attach the rocker arm oil pressure switch to the oil pressure gauge attachment (B). NOTE: Install the parts in the reverse order of removal with a new O-ring.
  12. Reconnect the rocker arm oil pressure switch 2P connector.
  13. Start the engine.
  14. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  15. Check the oil pressure. Is the oil pressure at least 392 kPa (4.0 kgf/cm 2 , 56.9 psi)? YES -Replace the rocker arm oil pressure switch (see «ROCKER ARM OIL PRESSURE SWITCH REMOVAL/INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ), then go to step 20 . NO -Check the engine oil pressure (see «OIL PRESSURE TEST»(/acura/rdx/i-2009-2012/remont/lubrication-system/#engine-lubrication__oil-pressure-test) ). If the pressure is OK, inspect the VTEC system. If it is OK, replace the rocker arm oil control valve (see «ROCKER ARM OIL CONTROL VALVE REMOVAL/INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ), then go to step 20 .
  16. Turn the ignition switch to LOCK(0).
  17. Jump the SCS line with the HDS.
  18. Disconnect PCM connector C (44P).
  19. Check for continuity between PCM connector terminal C22 and body ground. Is there continuity? YES -Repair a short in the wire between the PCM (C22) and the rocker arm oil pressure switch, then go to step 20. NO -Go to step 26 .
  20. Reconnect all connectors.
  21. Turn the ignition switch to ON (II).
  22. Reset the PCM with the HDS.
  23. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
  24. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  25. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2646 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil pressure Switch, the rocker arm oil control solenoid and the PCM, then go step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) .
  26. Reconnect all connectors.
  27. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
  28. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  29. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2646 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil pressure switch, the rocker arm oil control solenoid, and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 28 . If the PCM was substituted, go to step 1 . NO --If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) .

DTC P2647: Rocker Arm 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 323

Scheme 323: DTC P2647: Rocker Arm Oil Pressure Switch Circuit High Voltage
Scheme 323: DTC P2647: Rocker Arm Oil Pressure Switch Circuit High Voltage

Scheme 324

Scheme 324
Scheme 324

Scheme 325

Scheme 325
Scheme 325
  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 17 .
  2. Turn the ignition switch to ON (II).
  3. Clear the DTC with the HDS.
  4. Do the VTEC TEST in the INSPECTION MENU with the HDS. NOTE: If a DTC was stored during the VTEC TEST, check the DTCs MENU. If DTC P2647 is indicated, go to step 6 . If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) . 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, the rocker arm oil control solenoid, and the 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 those above? YES -Go to step 6. NO -Check for poor connections or loose terminals at the rocker arm oil pressure switch and the PCM. If the connections are OK, replace the rocker arm oil control valve (see «ROCKER ARM OIL CONTROL VALVE REMOVAL/INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ), then, go to step 15 .
  6. Turn the ignition switch to LOCK (0).
  7. Disconnect the rocker arm oil pressure switch 2P connector.
  8. At the rocker arm oil pressure switch side, check for continuity between rocker arm 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 (see «ROCKER ARM OIL PRESSURE SWITCH REMOVAL/INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ), then go to step 16 .
  9. Turn the ignition switch to ON (II).
  10. Measure the voltage between rocker arm oil pressure switch 2P connector terminal No. 1 and body ground. Is there about 5 V? YES -Repair an open in the wire between the rocker arm oil pressure switch and G101 (see «CONNECTOR TO FUSE/RELAY BOX INDEX»(/acura/rdx/i-2009-2012/remont/body-electrical/#fuserelay-boxes__connector-to-fuserelay-box-index) ), then go to step 15 . NO -Go to step 11.
  11. Turn the ignition switch to LOCK (0).
  12. Jump the SCS line with the HDS.
  13. Disconnect PCM connector C (44P).
  14. Check for continuity between PCM connector terminal C22 and rocker arm oil pressure switch 2P connector terminal No. 1. Is there continuity? YES -Go to step 21 . NO -Repair an open in the wire between the PCM (C22) and the rocker arm oil pressure switch, then go to step 16 .
  15. Turn the ignition switch to LOCK (0).
  16. Reconnect all connectors.
  17. Turn the ignition switch to ON (II).
  18. Reset the PCM with the HDS.
  19. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
  20. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2647 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil pressure switch, the rocker arm oil control solenoid and the PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) .
  21. Reconnect all connectors.
  22. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
  23. Start the engine, and let it idle.
  24. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2647 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil pressure switch, the rocker arm oil control solenoid and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 23 . If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) .

DTC P2648: Rocker Arm Oil Control Solenoid 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 326

Scheme 326: DTC P2648: Rocker Arm Oil Control Solenoid Circuit Low Voltage
Scheme 326: DTC P2648: Rocker Arm Oil Control Solenoid Circuit Low Voltage

Scheme 327

Scheme 327
Scheme 327
  1. Turn the ignition switch to 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 and the PCM. NO -Go to step 4.
  4. Turn the ignition switch to LOCK (0).
  5. Disconnect the rocker arm oil control solenoid 2P connector.
  6. At the solenoid side, measure the resistance between rocker arm oil control solenoid 2P connector terminals No. 1 and No. 2. Is there 14-30 ohms at room temperature (about 68°F, 20°C)? YES -Go to step 7. NO -Go to step 10 .
  7. Jump the SCS line with the HDS.
  8. Disconnect PCM connector B (44P).
  9. Check for continuity between PCM connector terminal B2 and body ground. Is there continuity? YES -Repair a short in the wire between the PCM (B2) and the rocker arm oil control solenoid, then go to step 11 . NO -Go to step 18 .
  10. Replace the rocker arm oil control valve (see «ROCKER ARM OIL CONTROL VALVE REMOVAL/INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ).
  11. Reconnect all connectors.
  12. Turn the ignition switch to ON (II).
  13. Reset the PCM with the HDS.
  14. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
  15. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  16. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2648 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil control solenoid and the 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 HDS indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 16 , go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) . NO -If the HDS indicates FAILED, go to step 1 and recheck. If the HDS indicates NOT COMPLETED, go to step 15 .
  18. Reconnect all connectors.
  19. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
  20. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  21. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2648 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil control solenoid and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 20 . If the 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 HDS indicate PASSED? YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). If any other Pending or Confirmed DTCs were indicated in step 21 , go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) . NO -If the HDS indicates FAILED, check for poor connections or loose terminals at the rocker arm oil control solenoid and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 20 . If the PCM was substituted, go to step 1 . If the HDS indicates NOT COMPLETED, go to step 20 .

DTC P2649: Rocker Arm Oil Control Solenoid 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 328

Scheme 328: DTC P2649: Rocker Arm Oil Control Solenoid Circuit High Voltage
Scheme 328: DTC P2649: Rocker Arm Oil Control Solenoid Circuit High Voltage

Scheme 329

Scheme 329
Scheme 329

Scheme 330

Scheme 330
Scheme 330
  1. Turn the ignition switch to ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3, 000 RPM without load (in P or N) until the radiator fan comes on, then let it idle.
  4. Check for Pending or Confirmed 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 and the PCM.
  5. Turn the ignition switch to LOCK (0).
  6. Disconnect the rocker arm oil control solenoid 2P connector.
  7. At the solenoid side, measure the resistance between rocker arm oil control solenoid 2P connector terminals No. 1 and No. 2. Is there 14-30 ohms at room temperature (about 68°F, 20°C)? YES -Go to step 8. NO -Go to step 12 .
  8. Check for continuity between rocker arm oil control solenoid 2P connector terminal No. 1 and body ground. Is there continuity? YES -Go to step 9. NO -Repair an open in the wire between the rocker arm oil control solenoid and G101 (see «CONNECTOR TO FUSE/RELAY BOX INDEX»(/acura/rdx/i-2009-2012/remont/body-electrical/#fuserelay-boxes__connector-to-fuserelay-box-index) ), then go to step 13 .
  9. Jump the SCS line with the HDS.
  10. Disconnect PCM connector B (44P).
  11. Check for continuity between PCM connector terminal B2 and rocker arm oil control solenoid 2P connector terminal No. 2. Is there continuity? YES -Go to step 19 . NO -Repair an open in the wire between the PCM (B2) and the rocker arm oil control solenoid, then go to step 13 .
  12. Replace the rocker arm oil control valve (see «ROCKER ARM OIL CONTROL VALVE REMOVAL/INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ).
  13. Reconnect all connectors.
  14. Turn the ignition switch to ON (II).
  15. Reset the PCM with the HDS.
  16. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) ).
  17. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2649 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil control solenoid and the PCM, then go to step 1 . NO -Go to step 18.
  18. Monitor the OBD STATUS for DTC P2649 in the DTCs MENU with the HDS. Does the HDS indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 17 , go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) . NO -If the HDS indicates FAILED, go to step 1 and recheck. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.
  19. Reconnect all connectors.
  20. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ).
  21. Start the engine, and let it idle.
  22. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2649 indicated? YES -Check for poor connections or loose terminals at the rocker arm oil control solenoid and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 21 . If the PCM was substituted, go to step 1 . NO -Go to step 23.
  23. Monitor the OBD STATUS for DTC P2649 in the DTCs MENU with the HDS. Does the HDS indicate PASSED? YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). If any other Pending or Confirmed DTCs were indicated in step 22 , go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) . NO -If the HDS indicates FAILED, check for poor connections or loose terminals at the rocker arm oil control solenoid and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2009-2012/remont/testing-diagnostics/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 21 . If the PCM was substituted, go to step 1 . If the HDS indicates NOT COMPLETED, keep idling until a result comes on.

Scheme 331

Scheme 331: VTC Oil Control Solenoid Valve Removal/Test/Installation
Scheme 331: VTC Oil Control Solenoid Valve Removal/Test/Installation

Scheme 332

Scheme 332
Scheme 332

Scheme 333

Scheme 333
Scheme 333
  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. Connect VTC oil control solenoid valve 2P connector terminal No. 2 to the battery positive terminal with a jumper wire. Connect VTC oil control solenoid valve 2P connector terminal No. 1 to the battery negative terminal with a jumper wire.
  4. Measure the clearance of the valve (A). The clearance should be at least 0.05 in (1.2 mm). If the clearance is as specified, the valve is OK, reinstall it with a new O-ring. If the clearance is not as specified, install a new valve and O-ring. NOTE: Before you install the valve, make sure its mating surface to the cylinder head is clean and dry. Coat the O-ring with new engine oil before you install it. Do not install the valve while wearing cloth fibrous gloves. Be careful not to contaminate the cylinder head opening.

Scheme 334

Scheme 334: CMP Sensor A Replacement
Scheme 334: CMP Sensor A Replacement
  1. Remove the air cleaner (see «AIR CLEANER REMOVAL/INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#intake-air-system) ).
  2. Remove the air bypass outlet pipe (see «CHARGE AIR COOLER REMOVAL AND INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#intake-manifold-and-exhaust-system) ).
  3. Disconnect the CMP sensor A 3P connector (A).
  4. Remove CMP sensor A (B) from the intake camshaft side of the cylinder head.
  5. Install the parts in the reverse order of removal with a new O-ring (C).

Scheme 335

Scheme 335: Rocker Arm Oil Control Valve Removal/Installation
Scheme 335: Rocker Arm Oil Control Valve Removal/Installation
  1. Remove the charge air cooler cover (see step 1 under «CHARGE AIR COOLER REMOVAL AND INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#intake-manifold-and-exhaust-system) ).
  2. Remove the turbocharger cover (see step 4 under «WARM UP TWC REMOVAL/INSTALLATION»(/acura/rdx/i-2009-2012/remont/exhaust/#catalytic-converter-system) ).
  3. Disconnect the rocker arm oil control solenoid connector (A) and the rocker arm oil pressure switch connector (B).
  4. Remove the water hose upper cover (C).
  5. Remove the rocker arm oil control valve (D) and cover (E).
  6. Install the parts in the reverse order of removal with a new solenoid valve filter (F).

Scheme 336

Scheme 336: Rocker Arm Oil Pressure Switch Removal/Installation
Scheme 336: Rocker Arm Oil Pressure Switch Removal/Installation
  1. Remove the rocker arm oil control valve (see «ROCKER ARM OIL CONTROL VALVE REMOVAL/INSTALLATION»(/acura/rdx/i-2009-2012/remont/mechanical/#vtecvtc) ).
  2. Remove the rocker arm oil pressure switch (A).
  3. Install the parts in the reverse order of removal with a new O-ring (B).

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