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.
   • Records the DTCs. (Print out using CONSULT and affix to the Work Order Sheet.)
   • Erase DTCs.
   • Check the relation between the cause found by DTC and the malfunction information from customer. Symptom Table  can be used effectively.
3. Check the relevant information including STI, etc.

Do malfunction information and DTC exists?

Malfunction information and DTC exists.

GO TO  3.

Malfunction information exists but no DTC.

GO TO  4.

NO

GO TO  5.

Check the malfunction described by the customer on the vehicle.

Check if the behavior is fail safe or normal operation. Refer to Fail-safe .

Interview sheet can be used effectively when reproduce malfunction conditions. 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.

Check if the behavior is fail safe or normal operation. Refer to Fail-safe .

Interview sheet can be used effectively when reproduce malfunction conditions. 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

Follow Intermittent Incident to check.

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

DTC is reproduced: GO TO  5.

YES

Malfunction is reproduced: GO TO  6.

NO

Before delivering the vehicle to the customer, make sure that DTC is erased.