Component Inspection

■ Check PCV 

1. IG "OFF". Remove PCV valve from rocker cover.
2. Insert a thin tool into the PCV valve from the threaded side and verify that the plunger is moving.
3. Is the PCV valve moving correctly?

   YES 

   • Go to "Check PCSV" as follows.

   NO 

   • Substitute with a known - good PCV and check for proper operation.

     If the problem is corrected, replace PCV and go to "VERIFICATION OF VEHICLE REPAIR " procedure

■ Check PCSV 

1. IG "OFF". Disconnect PCSV and Vacuum Hose.
2. Apply vacuum on PCSV with Hand Vacuum Gauge.
3. Is the PCSV keeping the Vacuum?

   YES 

   • Go to "Check injector" as follows.

   NO 

   • Substitute with a known - good PCSV and check for proper operation.

     If the problem is corrected, replace PCSV and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

■ Check injector for normal operation 

1. Start engine.
2. Check that RPM decrease when performing the injector's actuation test.
3. Is there any cylinder with no change in RPM or only a small change in RPM?

   YES 

   • Substitute with a known-good Injector and check for proper operation. If the problem is corrected, replace Injector and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO 

   • Go to "Check sensors related to Fuel Trim" below.

■ Check Sensors related to Fuel Trim 

1. Check the Input Voltage of Sensors related to Fuel Trim (MAPS, TPS, ECTS, PCSV, Injector, and etc)

   Refer to applicable troubleshooting procedure.

2. Are the sensors related to Fuel Trim O.K?

   YES 

   • Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO 

   • Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.