System Inspection

Check air leakage
1. Check for contamination or improper installation of gasket.
  Check throttle body gasket.
  
  Check gasket between intake manifold and surge tank.
  
  Check for contamination or clog by foreign material of gasket between intake manifold and injector.
  
  Check for contamination or sticking condition resulting from foreign material between surge tank and PCSV.
2. Is there any air leakage?
  YES
  - Repair or replace as necessary, and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NO
  - Go to " 2 Check exhaust system for clogging" as follows.
Check exhaust system for clogging
1. Check exhaust system.
  Clogged or broken muffler
  
  Broken catalyst
2. Is the exhaust system clogged?
  YES
  1. Go to " 3 Check if throttle valve is stuck" as follows.
  NO
  1. Repair or replace as necessary, and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check if throttle valve is stuck
1. IG "OFF".
2. Remove air hose between throttle body and airflow sensor.
3. Check if throttle valve is stuck by foreign material.
4. Is the throttle valve normal?
  YES
  1. Go to "COMPONENT INSPECTION " procedure.
  NO
  1. After getting rid of foreign material, check that throttle valve is normal. And check for proper operation. If the problem is corrected, replace ETC and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
    Procedure of Electronic Throttle Control system Initialization
    1. Erase the trouble codes on PCM
    2. Turn the ignition key off and keep this condition until the main relay is turned off. (It will take 10sec.)
    3. Turn ignition key on more than 1second to record the throttle motor position on the EEPROM