Diagnosis Procedure

1. Start the engine and let idle for 1 minute.
2. Connect CONSULT and check for ENGINE diagnostic trouble codes.
3. Are any of the following displayed as current or have accumulated past counts on the CONSULT screen:
   • Any fuel system, injector or rail pressure sensor DTCs
   • Any turbocharger, crankcase or EGR related DTCs
   • P0263-00
   • P0266-00
   • P0269-00
   • P0272-00
   • P0275-00
   • P0278-00
   • P0281-00
   • P0284-00
   • P0335-00
   • P0340-00
   • P0344-00
   NOTE: If the multi cylinder misfire DTC (P0300-00) is current, diagnose P0300-00 first.

Is applicable DTC detected?

YES

Refer to DTC Index .

NO

GO TO 2 .

1. Turn ignition switch ON.
2. Connect CONSULT and check for ENGINE diagnostic trouble codes.
3. Check for DTC P0306 being current on the CONSULT screen.

Is DTC P0306-00 detected as current?

YES

GO TO 3 .

NO

Refer to Intermittent Incident .

1. Turn ignition switch ON.
2. Operate the engine under the conditions in which the complaint occurs.
3. Connect CONSULT and perform the Cylinder Cutout Test to disable individual injectors.

Is the symptom attributed to number 6 cylinder?

YES

Replace cylinder 6 injector. Refer to Removal and Installation (CYLINDER 6 and CYLINDER 8) .

NO

GO TO 4 .

1. Turn ignition switch ON.
2. Perform the Fuel Injector Drain Flow Test on the bank of cylinder number 6.

Is the symptom attributed to number 6 cylinder?

YES

Replace malfunctioning injectors. Refer to Removal and Installation (CYLINDER 6 and CYLINDER 8) .

NO

GO TO 5 .

Check compression pressure. Refer to Compression Check .

Is the inspection result normal?

YES

Refer to Engine Runs Rough or Misfires troubleshooting symptom. Refer to Symptom Table .

NO

Follow the instruction of "CHECK COMPRESSION PRESSURE". Refer to Compression Check .