Home ReviewsRefund
Home/Acura/ZDX/Acura ZDX I (2009-2013)/Repair manual/Auxiliary Emission Control Systems/PCV System
Contents Wiring diagrams Section: Auxiliary Emission Control Systems All sections

PCV System Acura ZDX I

Auxiliary Emission Control Systems 4 illustrations ~554 words

Scheme 70

Scheme 70: Component Location Index
Scheme 70: 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 Engine mount control system vacuum hose/lines 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 (in P or N) 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 HDS indicate FAILED? YES -Check the camshaft timing and the valve clearances (see «VALVE CLEARANCE ADJUSTMENT»(/acura/zdx/i-2009-2013/remont/mechanical/#cylinder-head__valve-clearance-adjustment) ), then go to step 4. NO -If the HDS indicates PASSED, intermittent failure, the system is OK at this time. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS 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/zdx/i-2009-2013/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 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 HDS indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 6 , go to the indicated «DTCS TROUBLESHOOTING»(/acura/zdx/i-2009-2013/remont/auxiliary-emission-control-systems/#pcv-system) . NO -If the HDS indicates FAILED, go to step 1 . If the HDS indicates EXECUTING or OUT OF CONDITION, keep idling until a result comes on.

Scheme 71

Scheme 71: PCV Valve Inspection
Scheme 71: PCV Valve Inspection

Scheme 72

Scheme 72
Scheme 72
  1. Remove the engine cover (see step 1 on «REMOVAL»(/acura/zdx/i-2009-2013/remont/mechanical/#intake-manifold-and-exhaust-system) ).
  2. Check the PCV valve (A), the hoses (B), and the connections for leaks or restrictions.
  3. 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 collar and O-rings for cracks or damage. If they are OK, replace the PCV valve (see «PCV VALVE REPLACEMENT»(/acura/zdx/i-2009-2013/remont/auxiliary-emission-control-systems/#pcv-system) ) and recheck.

Scheme 73

Scheme 73: PCV Valve Replacement
Scheme 73: PCV Valve Replacement
  1. Remove the engine cover (see step 1 on «REMOVAL»(/acura/zdx/i-2009-2013/remont/mechanical/#intake-manifold-and-exhaust-system) ).
  2. Lift up the engine harness holder (A).
  3. Remove the bolt (B).
  4. Remove the PCV valve (C). NOTE: Take care not to spill oil on the hot exhaust manifold.
  5. 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.

More articles — Engine