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

Testing & Diagnostics 30 illustrations ~6685 words

Scheme 192

Scheme 192: Component Location Index
Scheme 192: 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 193

Scheme 193: DTC P0010: VTC Oil Control Solenoid Valve Malfunction
Scheme 193: DTC P0010: VTC Oil Control Solenoid Valve Malfunction

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  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  4. Do the 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 PCM.
  6. Turn the ignition switch OFF.
  7. Disconnect the VTC oil control solenoid valve 2P connector.
  8. At the solenoid 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 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 open in the wire between the VTC oil control solenoid valve and G101 (see «ENGINE WIRE HARNESS»(/acura/rdx/i-2006-2009/remont/body-electrical/#connectors-and-harnesses__engine-wire-harness) ), 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 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 VTC oil control solenoid valve 2P connector terminal No. 2 and PCM connector terminal C23. Is there continuity? YES - Go to step 22 . NO - Repair 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-2006-2009/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ).
  15. Reconnect all connectors.
  16. Turn the ignition switch ON (II).
  17. Reset the PCM with the HDS.
  18. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2006-2009/remont/engine-control-systems/#idle-control-system__pcm-idle-learn-procedure) ).
  19. Do the VTC TEST in the INSPECTION MENU with the HDS.
  20. 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 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 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 PCM, then go to step 1 . If the screen 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-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ).
  24. Do the VTC TEST in the INSPECTION MENU with the HDS.
  25. 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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#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 screen 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-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). If any other Temporary DTCs or DTCs were indicated in step 25, 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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 24 . If the PCM was substituted, go to step 1 . If the screen 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 197

Scheme 197: DTC P0011: VTC System Malfunction
Scheme 197: 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/rdx/i-2006-2009/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 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 drive belt auto-tensioner (see «DRIVE BELT AUTO-TENSIONER REMOVAL/INSTALLATION»(/acura/rdx/i-2006-2009/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-2006-2009/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/rdx/i-2006-2009/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/rdx/i-2006-2009/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/rdx/i-2006-2009/remont/mechanical/#cylinder-head) ), then go to step 14 .
  14. Turn the ignition switch ON (II).
  15. Reset the PCM with the HDS.
  16. Clear the CKP pattern with the HDS.
  17. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2006-2009/remont/engine-control-systems/#idle-control-system__pcm-idle-learn-procedure) ).
  18. Do the CKP pattern learn procedure (see «HDS CLEAR COMMAND»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__hds-clear-command) ).
  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 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 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 198

Scheme 198: DTC P0340: CMP Sensor A No Signal
Scheme 198: DTC P0340: CMP Sensor A No Signal

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Scheme 202
  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 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 CMP sensor A and the No. 3 IG1 ACG (15 A) fuse, 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 (see «ENGINE WIRE HARNESS»(/acura/rdx/i-2006-2009/remont/body-electrical/#connectors-and-harnesses__engine-wire-harness) ), then go to step 18 .
  11. Turn the ignition switch OFF.
  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 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 CMP sensor A 3P connector terminal No. 1 and PCM connector terminal C41. Is there continuity? YES - Go to step 23 . NO - Repair open in the wire between the PCM (C41) and CMP sensor A, then go to step 18 .
  16. Turn the ignition switch OFF.
  17. Replace CMP sensor A (see «CMP SENSOR A REPLACEMENT»(/acura/rdx/i-2006-2009/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 PCM with the HDS.
  21. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2006-2009/remont/engine-control-systems/#idle-control-system__pcm-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 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.
  23. Reconnect all connectors.
  24. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/rdx/i-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ).
  25. 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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#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-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs 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 ).

  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 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/rdx/i-2006-2009/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/rdx/i-2006-2009/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 14 .
  11. Check the camshaft timing (see step 5 under «CAM CHAIN REMOVAL»(/acura/rdx/i-2006-2009/remont/mechanical/#cylinder-head__cam-chain-removal) ). Is the camshaft timing OK? YES - Go to step 12 . NO - Reset the camshaft timing (see «CAM CHAIN REMOVAL»(/acura/rdx/i-2006-2009/remont/mechanical/#cylinder-head__cam-chain-removal) ), then go to step 14 .
  12. Check for damage or stretch at the cam chain (see «CHAIN CASE OIL SEAL INSTALLATION»(/acura/rdx/i-2006-2009/remont/mechanical/#cylinder-head__chain-case-oil-seal-installation) ). Is the cam chain damaged? YES - Replace the cam chain and auto-tensioner (see «AUTO-TENSIONER REMOVAL AND INSTALLATION»(/acura/rdx/i-2006-2009/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-2006-2009/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/rdx/i-2006-2009/remont/mechanical/#cylinder-head) ), then go to step 14 .
  14. Turn the ignition switch ON (II).
  15. Reset the PCM with the HDS.
  16. Clear the CKP pattern with the HDS.
  17. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2006-2009/remont/engine-control-systems/#idle-control-system__pcm-idle-learn-procedure) ).
  18. Do the CKP pattern learn procedure (see «HDS CLEAR COMMAND»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__hds-clear-command) ).
  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 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 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 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 connectors or terminals, then go to step 11 .
  8. Check for damage to the CMP sensor A pulser plate (see «CMP PULSE PLATE A REPLACEMENT»(/acura/rdx/i-2006-2009/remont/mechanical/#cylinder-head) ). Is the pulser plate damaged ? YES - Replace the CMP sensor A pulser plate (see «CMP PULSE PLATE A REPLACEMENT»(/acura/rdx/i-2006-2009/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/rdx/i-2006-2009/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ).
  11. Turn the ignition switch ON (II).
  12. Reset the PCM with the HDS.
  13. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2006-2009/remont/engine-control-systems/#idle-control-system__pcm-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 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

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 203

Scheme 203: DTC P1009: VTC Advance Malfunction
Scheme 203: DTC P1009: VTC Advance Malfunction
  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 drive belt auto-tensioner (see «DRIVE BELT AUTO-TENSIONER REMOVAL/INSTALLATION»(/acura/rdx/i-2006-2009/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-2006-2009/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/rdx/i-2006-2009/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/rdx/i-2006-2009/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/rdx/i-2006-2009/remont/mechanical/#cylinder-head) ), then go to step 10 .
  10. Turn the ignition switch ON (II).
  11. Reset the PCM with the HDS.
  12. Clear the CKP pattern with the HDS.
  13. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2006-2009/remont/engine-control-systems/#idle-control-system__pcm-idle-learn-procedure) ).
  14. Do the CKP pattern learn procedure (see «HDS CLEAR COMMAND»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__hds-clear-command) ).
  15. Check for Temporary DTCs or 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 Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

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 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 ).

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  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 21 .
  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, the rocker arm oil control solenoid, and the PCM. NO - Go to step 5 .
  5. Turn the ignition switch OFF.
  6. Disconnect the rocker arm 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 ON indicated? YES - Go to step 17 . NO - Go to step 9 .
  9. Turn the ignition switch OFF.
  10. Remove the charge air cooler cover (see step 1 under «CHARGE AIR COOLER REMOVAL AND INSTALLATION»(/acura/rdx/i-2006-2009/remont/exhaust/#intake-manifold-and-exhaust-system) ).
  11. Remove the rocker arm oil pressure switch (A), and install the special tools as shown, then install the rocker arm oil pressure switch on 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 VTEC oil pressure. Does the oil pressure increase to 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-2006-2009/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 21 . NO - Go to step 16 .
  16. Check the engine oil pressure (see «OIL PRESSURE TEST»(/acura/rdx/i-2006-2009/remont/lubrication-system/#engine-lubrication__oil-pressure-test) ). Is the engine oil pressure OK? YES - Replace the rocker arm oil control solenoid (see «ROCKER ARM OIL CONTROL VALVE REMOVAL/INSTALLATION»(/acura/rdx/i-2006-2009/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 21 . NO - Repair the cause of the low oil pressure, then go to step 21 .
  17. Turn the ignition switch OFF.
  18. Jump the SCS line with the HDS.
  19. Disconnect PCM connector C (44P).
  20. Check for continuity between PCM connector terminal C22 and body ground. Is there continuity? YES - Repair short in the wire between the PCM (C22) and the rocker arm oil pressure switch, then go to step 21 . NO - Go to step 28 .
  21. Reconnect all connectors.
  22. Turn the ignition switch ON (II).
  23. Reset the PCM with the HDS.
  24. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2006-2009/remont/engine-control-systems/#idle-control-system__pcm-idle-learn-procedure) ).
  25. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  26. 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, the rocker arm oil control solenoid and the PCM, then go step 1. NO - Go to step 27 .
  27. 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 26, 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, the rocker arm oil control solenoid, and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 25 .
  28. Reconnect all connectors.
  29. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/rdx/i-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ).
  30. Do the VTEC TEST in the INSPECTION MENU with the HDS.
  31. 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, 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-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 30 . If the PCM was substituted, go to step 1 . NO - Go to step 32 .
  32. Monitor the OBD STATUS for DTC P2646 in the DTCs MENU with the HDS. Does the screen 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-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). If any other Temporary DTCs or DTCs were indicated in step 31, 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, 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-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 30 . If the PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 30 .

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 206

Scheme 206: DTC P2647: Rocker Arm Oil Pressure Switch Circuit High Voltage
Scheme 206: DTC P2647: Rocker Arm Oil Pressure Switch Circuit High Voltage

Scheme 207

Scheme 207
Scheme 207

Scheme 208

Scheme 208
Scheme 208
  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 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. 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 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-2006-2009/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then, go to step 15 .
  6. Turn the ignition switch OFF.
  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-2006-2009/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ), then go to step 16 .
  9. Turn the ignition switch ON (II).
  10. Measure voltage between rocker arm 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 and G101 (see «ENGINE WIRE HARNESS»(/acura/rdx/i-2006-2009/remont/body-electrical/#connectors-and-harnesses__engine-wire-harness) ), then go to step 15 . NO - Go to step 11 .
  11. Turn the ignition switch OFF.
  12. Jump the SCS line with the HDS.
  13. Disconnect PCM connector C (44P).
  14. Check for continuity between rocker arm oil pressure switch 2P connector terminal No. 1 and PCM connector terminal C22. Is there continuity? YES - Go to step 22 . NO - Repair 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 OFF.
  16. Reconnect all connectors.
  17. Turn the ignition switch ON (II).
  18. Reset the PCM with the HDS.
  19. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2006-2009/remont/engine-control-systems/#idle-control-system__pcm-idle-learn-procedure) ).
  20. 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, the rocker arm oil control solenoid and the PCM, then go to step 1 . NO - Go to step 21 .
  21. 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 20, 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, the rocker arm oil control solenoid, and the PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
  22. Reconnect all connectors.
  23. Update the PCM if it does not have the latest software (see «PCM UPDATE»(/acura/rdx/i-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ).
  24. Start the engine, and let it idle.
  25. 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, 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-2006-2009/remont/auxiliary-emission-control-systems/#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 P2647 in the DTCs MENU with the HDS. Does the screen 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-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). If any other Temporary DTCs or DTCs were indicated in step 25, 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, 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-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 24 . If the 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 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 209

Scheme 209: DTC P2648: Rocker Arm Oil Control Solenoid Circuit Low Voltage
Scheme 209: DTC P2648: Rocker Arm Oil Control Solenoid Circuit Low Voltage

Scheme 210

Scheme 210
Scheme 210
  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 and the PCM. NO - Go to step 4 .
  4. Turn the ignition switch OFF.
  5. Disconnect the rocker arm oil control solenoid 2P connector.
  6. At the solenoid side, measure resistance between rocker arm oil control solenoid 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 PCM connector B (44P).
  9. Check for continuity between PCM connector terminal B34 and body ground. Is there continuity? YES - Repair short in the wire between the PCM (B34) 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-2006-2009/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 PCM with the HDS.
  14. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2006-2009/remont/engine-control-systems/#idle-control-system__pcm-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 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 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 and recheck. If the screen 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-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ).
  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 and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#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 screen 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-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). 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 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-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 20 . If the PCM was substituted, go to step 1 . If the screen 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 211

Scheme 211: DTC P2649: Rocker Arm Oil Control Solenoid Circuit High Voltage
Scheme 211: DTC P2649: Rocker Arm Oil Control Solenoid Circuit High Voltage

Scheme 212

Scheme 212
Scheme 212

Scheme 213

Scheme 213
Scheme 213
  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 and the PCM.
  5. Turn the ignition switch OFF.
  6. Disconnect the rocker arm oil control solenoid 2P connector.
  7. At the solenoid side, measure resistance between rocker arm oil control solenoid 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 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 open in the wire between the rocker arm oil control solenoid and G101 (see «ENGINE WIRE HARNESS»(/acura/rdx/i-2006-2009/remont/body-electrical/#connectors-and-harnesses__engine-wire-harness) ), 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 B34 and rocker arm oil control solenoid 2P connector terminal No. 2. Is there continuity? YES - Go to step 19 . NO - Repair open in the wire between the PCM (B34) 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-2006-2009/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ).
  13. Reconnect all connectors.
  14. Turn the ignition switch ON (II).
  15. Reset the PCM with the HDS.
  16. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/rdx/i-2006-2009/remont/engine-control-systems/#idle-control-system__pcm-idle-learn-procedure) ).
  17. 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 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 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, go to step 1 and recheck. If the screen 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-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ).
  21. Start the engine, and let it idle.
  22. 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 and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#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 screen 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-2006-2009/remont/testing-diagnostics/#pgm-fi-system__pcm-replacement) ). If any other Temporary DTCs or DTCs were indicated in step 22, go to the indicated DTCs troubleshooting. NO - If the screen 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-2006-2009/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-pcm) ), then go to step 21 . If the PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

Scheme 214

Scheme 214: VTC Oil Control Solenoid Valve Removal/Test/Installation
Scheme 214: VTC Oil Control Solenoid Valve Removal/Test/Installation

Scheme 215

Scheme 215
Scheme 215

Scheme 216

Scheme 216
Scheme 216

Scheme 217

Scheme 217
Scheme 217

Scheme 218

Scheme 218
Scheme 218
  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 strainer for clogging. If the strainer is clogged, replace the VTC oil control solenoid valve.
  4. Note the amount of valve opening by observing the position of the piston shoulder (A) through the valve retard drain port. If you seethe shoulder of the piston, the valve is open and must be replaced. 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. Appearance of inner valve (A) in the port should be at least 0.05 in. (1.2 mm). If the inner valve does not open, replace it; then go to step 7 . Open
  7. Coat a new O-ring (A) with engine oil, then install it.
  8. Clean and dry the mating surface of the valve.
  9. Install the valve. NOTE: Do not install the valve while wearing cloth fibrous gloves. Be careful not to contaminate the cylinder head opening.

Scheme 219

Scheme 219: CMP Sensor A Replacement
Scheme 219: CMP Sensor A Replacement
  1. Remove the air cleaner (see «AIR CLEANER REMOVAL/INSTALLATION»(/acura/rdx/i-2006-2009/remont/mechanical/#intake-air-system) ).
  2. Remove the air bypass outlet pipe (see «CHARGE AIR COOLER REMOVAL AND INSTALLATION»(/acura/rdx/i-2006-2009/remont/exhaust/#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 220

Scheme 220: Rocker Arm Oil Control Valve Removal/Installation
Scheme 220: 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-2006-2009/remont/exhaust/#intake-manifold-and-exhaust-system) ).
  2. Remove the turbocharger cover (see step 4 under «WARM UP TWC REMOVAL/INSTALLATION»(/acura/rdx/i-2006-2009/remont/auxiliary-emission-control-systems/#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 221

Scheme 221: Rocker Arm Oil Pressure Switch Removal/Installation
Scheme 221: 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-2006-2009/remont/testing-diagnostics/#variable-valve-timing-and-lift-electronic-control-vtec-with-vtc) ).
  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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