PCV(Positive Crankcase Ventilation) valve check
Key "OFF".
Disconnect PCV valve.
Check the movement of plunger by putting in and out a thin stick.
Is the movement of plunger normal?
YES
Go to "PCSV check" procedure.
NO
Substitute with a known - good PCV valve and check for proper operation.
If the problem is corrected, replace PCV valve and go to "Verification of Vehicle Repair" procedure.
PCSV check
Key "OFF".
Disconnect PCSV and vacuum hose.
Apply a vacuum by a hand vacuum gauge on PCSV.
Does PCSV keep the vacuum condition normally?
YES
Go to "Injector check" procedure.
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.
Injector check
Key "OFF".
Disconnect injectors.
Check clog on injectors.
Measure the resistance between terminal 1 and 2 of injectors(Component side).
Specification :
Temperature[℃] | Resistance[Ω] |
20 | 14.5±0.7 |
Is the measured resistance within specifications ?
YES
Go to "Sensors related to air/fuel ratio check" procedure.
NO
Repair or replace as necessary. And then, go to "Verification of Vehicle Repair" procedure.
Sensors related to air/fuel ratio check
Check the output data of sensors related to air/fuel ratio (HO2S, MAPS, TPS, ECTS, PCSV, Injectors, etc) on scantool. (Refer to each DTC guide procedure.)
Are those sensors normal?
YES
Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage. So, check poor connections and the related circuit between ECM and component thoroughly. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
Repair or replace as necessary. And then, go to "Verification of Vehicle Repair" procedure.
