Component Inspection
- PCV (Positive Crankcase Ventilation) valve check.
- Key "OFF".
- Disconnect PCV valve.
- Check PCV plunger movement.
- Is the movement of plunger normal?
YES
- Go to 2 "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 3 "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).RESISTANCE SPECIFICATION
Temperature Resistance (Ω) 20 °C (68° F) 13.8~15.2Ω - Is the measured resistance within specifications?
YES
- Go to 4 "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
- Substitute with a known - good ECM/PCM and check for proper operation.
- If the problem is corrected, replace ECM/PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by ECM/PCM.
Before or after testing ECM/PCM on the vehicle, use this function to reuse the ECM/PCMNO
- Repair or replace as necessary. And then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.