Component Inspection

Component Inspection

1. Check PCV
(1) IG "OFF" and remove PCV valve from cylinder head
(2) With engine idling, block PCV valve and confirm that vacuum is felt.
(3) Insert thin stick into the screwed PCV valve and verify that the plunger is moving.
(4) Is the PCV valve normally moving ?
YES
1) Go to "Check PCSV as follows.
NO
1) Replace it, and go to "Verification of Vehicle Repair" procedure.
2. Check PCSV
(1) IG "OFF" and disconnect PCSV and vacuum hose.
(2) Connect hand-vacuum gage with PCSV and supply vacuum to it.
(3) Is the vacuum maintained ?
YES
1) Go to "Check injector" as follows.
NO
1) Repair or replace it, and go to "Verification of Vehicle Repair" procedure.
3. Check injector
(1) IG "OFF" and disconnect injector.
(2) Check it for blocking caused by any foreign substance.
(3) Measure resistance between terminals 1 and 2 of Injector connector. (Component side)
A. Specification:









(4) Is the measured resistance within specification ?
YES
1) Go to "Check sensor/actuator related to fuel system" as follows
NO
1) Repair or replace it, and go to "Verification of Vehicle Repair" procedure.
4. Check sensor/actuator related to fuel system
(1) Check the signal of sensor/actuator related to fuel system (HO2S, MAFS, MAPS, TPS, ECTS, PCSV, Injector and so on) (Refer to each DTC diagnostic procedure)
(2) Are all of these items normal ?
YES
1) Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.
NO
1) Repair it, and go to "Verification of Vehicle Repair" procedure.