DTC Diagnosis Procedure

If DTC P050A is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index .

NO>>

GO TO 2.

Refer to Work Procedure . Is Idle Air Volume Learning carried out successfully?

YES>>

GO TO 3.

NO>>

Follow the instruction of Idle Air Volume Learning.

Check for the cause of intake air volume lacking. Refer to the following.

• Crushed intake air passage
• Intake air passage clogging
• Clogging of throttle body

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace malfunctioning part

Perform DTC Confirmation Procedure for DTC P0171 or P0174. Refer to Confirmation Procedure or Confirmation Procedure . Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Refer to DTC Diagnosis Procedure or DTC Diagnosis Procedure . for DTC P0171 or P0174.

1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC Confirmation Procedure.

   Refer to Confirmation Procedure .

Is the 1st trip DTC P050A displayed again?

YES>>

GO TO 6.

NO>>

INSPECTION END

1. Replace ECM. Refer to ECM : Removal and Installation .
2. Refer to Work Procedure .

>>

INSPECTION END