Component Inspection

Check air leakage
1. Visually/physically inspect the air leakage in intake/exhaust system for following items
  - Throttle body gasket and damage
  - Blocking in intake manifold and injector caused by any foreign substance
2. Has a problem found in this procedure?
  YES
  - Repair relevant component(s) as necessary and then go to "VERIFICATION OF VEHICLE REPAIR ".
  NO
  - Go to next step as below.

Check the fuel line

Connect a GDS to DLC (Data Link Cable).
Start the engine and warm it up to the normal operation temperature.
Check the items related to an Fuel Pressure Sensor on "Current Data" using the GDS.
Is the sensor output normal?
Specification: 350~600 kPa

YES
- Go to next step as below.
NO
- Repair relevant component(s) as necessary and then go to "VERIFICATION OF VEHICLE REPAIR ".

Condition	Possible Cause
Fuel Pressure is too low	Fuel filter, fuel pressure regulator, in-tank fuel hose or the fuel pump
Fuel Pressure is too high	Fuel pressure regulator, hose or pipe

Check fuel leakage in injector
1. Turn the ignition switch "OFF" after checking the fuel pressure test.
2. Stop engine and check for a change in the fuel pressure gauge reading for 5 minutes.
  Specification: After engine stops, fuel gauge reading is maintained for 5 minutes.
3. Is the fuel gauge reading maintained?
  YES
  - Clear DTC and Test-drive under Prerequisite conditions above-mentioned. After the test, If this DTC is set, go to "Inspection & Repair" procedure. If not, troubleshooting is completed.
  NO
  - Repair relevant component(s) as necessary and then go to "VERIFICATION OF VEHICLE REPAIR ".