Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
System Inspection
- Check air leakage
- 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.
- 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 for contamination or improper installation of gasket.
- Check exhaust system for clogging
- Check exhaust system.
Clogged or broken muffler
Broken catalyst
- Is the exhaust system clogged?
YES
- Go to " 3 Check if throttle valve is stuck" as follows.
NO
- Repair or replace as necessary, and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- Check exhaust system.
- Check if throttle valve is stuck
- IG "OFF".
- Remove air hose between throttle body and airflow sensor.
- Check if throttle valve is stuck by foreign material.
- Is the throttle valve normal?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- 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
- Erase the trouble codes on PCM
- Turn the ignition key off and keep this condition until the main relay is turned off. (It will take 10sec.)
- Turn ignition key on more than 1second to record the throttle motor position on the EEPROM
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.