Work Flow

Refer to "DIAGNOSTIC WORK SHEET " and interview the customer to obtain the malfunction information (conditions and environment when the malfunction occurred) as much as possible when the customer brings in the vehicle.

GO TO 2.

1. Before checking the malfunction, check whether any DTC exists.
2. If DTC exists, perform the following operations.
   • Record the DTC and freeze frame data. (Print out the data using CONSULT and affix them to the Work Order Sheet.)
   • Erase DTCs.
   • Check the relationship between the cause that is clarified with DTC and the malfunction information described by the customer. "SYMPTOM TABLE " is effective.
3. Check the information of related service bulletins and others also.

   Do malfunction information and DTC exist? 

   Malfunction information and DTC exists.: GO TO 3.

   Malfunction information exists, but no DTC.: GO TO  4.

   No malfunction information, but DTC exists.: GO TO  5.

Check any malfunction described by a customer, except those with DTC on the vehicle.

Also investigate whether the symptom is a fail-safe or normal operation. Refer to "FAIL-SAFE ".

When a malfunction symptom is reproduced, the question sheet is effective. Refer to "DIAGNOSTIC WORK SHEET ".

Verify the relationship between the symptom and the conditions in which the malfunction described by the customer occurs.

GO TO  5.

Check the malfunction described by the customer on the vehicle.

Also investigate whether the symptom is a fail-safe or normal operation. Refer to "FAIL-SAFE ".

When a malfunction symptom is reproduced, the question sheet is effective. Refer to "DIAGNOSTIC WORK SHEET ".

Verify the relationship between the symptom and the conditions in which the malfunction described by the customer occurs.

GO TO  6.

Perform "DTC CONFIRMATION PROCEDURE" of the appropriate DTC to check if DTC is detected again.

Refer to "DTC INSPECTION PRIORITY CHART " when multiple DTCs are detected, and then determine the order for performing the diagnosis.

Is any DTC detected? 

YES: GO TO  7.

NO: Check according to "INTERMITTENT INCIDENT ".

Use "SYMPTOM TABLE " from the symptom inspection result in step 4. Then identify where to start performing the diagnosis based on possible causes and symptoms.

GO TO  8.

Repair or replace the detected malfunctioning parts.

Reconnect parts or connector after repairing or replacing, and then erase DTC if necessary.

GO TO 8.

Perform "DTC CONFIRMATION PROCEDURE" again to make sure that the repair is correctly performed.

Check that malfunctions are not reproduced when obtaining the malfunction information from the customer, referring to the symptom inspection result in step 3 or 4.

Is DTC or malfunction symptom reproduced? 

YES-1: DTC is reproduced: GO TO  5.

YES-2: Malfunction symptom is reproduced: GO TO  6.

NO: Before delivering the vehicle to the customer, make sure that DTC is erased.