Body Electrical Control System Check

Body Electrical Control System Check

Step 1: Customer Complaint Analysis

Record details of problem (failure, complaint) and how it occurred as described by the customer.

For this purpose, use of such a questionnaire form as shown in figure will facilitate collecting information to the point required for proper analysis and diagnosis.

Customer questionnaire (example)





Step 2: DTC Check

Check DTC stored in BCM memory. DTC Check

In case that current DTC is detected:

Perform applicable DTC troubleshooting for current DTC and repair or replace faulty parts.

In case that history DTC is detected:
1) Record DTC and then clear DTC once.
2) Perform Step 3: Trouble Symptom Confirmation.
3) Referring to "circuit diagram" and "trouble area" in applicable diag. flow, confirm related parts where intermittent trouble is easy to occur (e.g., wire harness, connector, etc.) for detected history DTC.
4) Check intermittent trouble. Intermittent Connection and Poor Contact Inspection

NOTE:

Never perform diag. flow.

In case that there is no DTC:
5) Perform Step 3: Trouble Symptom Confirmation.
6) If there is "Symptom Diagnosis" procedure for any possible cause, perform corresponding "Symptom Diagnosis" procedure.

NOTE:

"Symptom Diagnosis" procedures for body electrical control system are described in each section.

Step 3: Trouble Symptom Confirmation

Check if what customer claimed in "Customer Questionnaire" is actually found in vehicle and if that symptom is found. (This step should be shared with customer if possible.) Also, check if DTC is detected or not.

Step 4: Final Confirmation Test

Confirm that the problem symptom has gone and body electrical control system is free from any abnormal conditions. If what has been repaired is related to malfunction DTC, recheck DTC and confirm that no DTC is indicated.