Flowchart Of Trouble Diagnosis

DIAGNOSIS AND REPAIR WORK FLOW

Flowchart of Trouble Diagnosis

NOTE:
"DTC" includes DTC at the 1st trip.

1. OBTAIN INFORMATION ABOUT SYMPTOM

Question 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.

2. CHECK DTC

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 Related Diagnostic Procedures can be used effectively.
3.Check the relevant information including STI, etc.
Do malfunction information and DTC exist?
Malfunction information and DTC exist.-GO TO 3.
Malfunction information exists but no DTC.-GO TO 4.
No malfunction information, but DTC exists.-GO TO 5.

3. REPRODUCE MALFUNCTION SYSTEM

Check the malfunction described by the customer on the vehicle.
Check if the behavior is fail safe or normal operation. Refer toTCM.
Interview sheet can be used effectively when reproduce malfunction conditions. Question Sheet.
Verify the relationship between the symptom and the conditions in which the malfunction described by the customer occurs.
- GO TO 5.

4. REPRODUCE MALFUNCTION SYMPTOM

Check the malfunction described by the customer on the vehicle.
Check if the behavior is fail safe or normal operation. Refer toTCM.
Interview sheet can be used effectively when reproduce malfunction conditions.Question Sheet.
Verify the relationship between the symptom and the conditions in which the malfunction described by the customer occurs.
- GO TO 6.

5. PERFORM "DTC CONFIRMATION PROCEDURE"

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

6. IDENTIFY MALFUNCTIONING SYSTEM WITH "DIAGNOSIS CHART BY SYMPTOM"

Use Symptom Related Diagnostic Procedures 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.

7. REPAIR OR REPLACE THE MALFUNCTIONING PARTS

Repair or replace the detected malfunctioning parts.
Reconnect parts or connector after repairing or replacing, and then erase DTC if necessary.
- GO TO 8.

8. FINAL CHECK

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 is reproduced.)-GO TO 6.
NO- Before delivering the vehicle to the customer, make sure that DTC is erased.