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PCV System Acura TL IV

Testing & Diagnostics 4 illustrations ~518 words

Scheme 102

Scheme 102: Component Location Index
Scheme 102: Component Location Index

DTC P2279: Intake Air System Leak

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 P0443 is stored at the same time as DTC P2279, troubleshoot DTC P0443 first, then recheck for DTC P2279

  1. Check for vacuum leaks at these parts PCV valve PCV hose Purge (PCS) line Throttle body Intake manifold Brake booster Brake booster hose Engine mount Engine mount control solenoid valve Vacuum hose/line of the engine mount control system Are the parts OK? YES -Go to step 2 NO -Repair or replace any damaged part(s), then go to step 4
  2. Start the engine Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle 1 minute
  3. Monitor the OBD STATUS for DTC P2279 in the DTCs MENU with the HDS Does the screen indicate FAILED? YES -Check the camshaft timing (see «TIMING BELT INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#cylinder-head-j35z6__timing-belt-installation) ), then go to step 4 NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time If the screen indicates EXECUTING, keep idling until a result comes on If the screen indicates OUT OF CONDITION, go to step 2 and recheck
  4. Reset the PCM with the HDS
  5. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#idle-control-system__pcm-idle-learn-procedure) )
  6. Check for Pending or Confirmed DTCs with the HDS Is DTC P2279 indicated? YES -Check for vacuum leaks at the PCV valve, the PCV hose, the purge (PCS) line, the throttle body, the intake manifold, the brake booster, the brake booster hose, and the engine mount control system, then go to step 1 NO -Go to step 7
  7. Monitor the OBD STATUS for DTC P2279 in the DTCs MENU with the HDS Does the screen indicate PASSED? YES -Troubleshooting is complete If any other Pending or Confirmed DTCs were indicated in step 6, go to the indicated DTC's troubleshooting NO -If the screen indicates FAILED, go to step 1 If the screen indicates EXECUTING or OUT OF CONDITION, keep idling until a result comes on

Scheme 103

Scheme 103: PCV Valve Inspection
Scheme 103: PCV Valve Inspection

Scheme 104

Scheme 104
Scheme 104
  1. Check the PCV valve (A), the hoses (B), and connections for leaks or restrictions
  2. At idle, listen to the PCV valve (A) with a stethoscope as you lightly pinch the PCV hose (B) with your fingers or pliers several times Each time the hose is pinched, the valve should click If there is no clicking sound, check the PCV valve grommet for cracks or damage If the grommet is OK, replace the PCV valve and recheck

Scheme 105

Scheme 105: PCV Valve Replacement
Scheme 105: PCV Valve Replacement
  1. Lift up the harness cover (A)
  2. Remove the bolt (B)
  3. Remove the PCV valve (C) NOTE: Do not to spill oil on the hot exhaust manifold
  4. Install the parts in the reverse order of removal NOTE: When installing a new PCV valve, make sure the O-rings (D) are in place When installing a used PCV valve, use new O-rings

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