Initial Inspection and Diagnostic Overview

Body Electrical Control System Check

1.
Customer complaint analysis

Perform customer complaint analysis.

Was customer complaint analysis performed?
YES -
Go to Step 2.
NO -
Perform customer complaint analysis.

2.
Problem symptom confirmation

Perform problem symptom confirmation.

Is trouble symptom identified?
YES -
Go to Step 3.
NO -
Go to Step 7.

3.
DTC check

Check DTC.

Is it malfunction code?
YES -
Go to Step 4.
NO -
Go to Step 5.

4.
Troubleshooting for DTC

Check and repair according to DTC diag. flow.

Are check and repair completed?
YES -
Go to Step 7.
NO -
Check and repair malfunction part(s).

5.
Body electrical control system symptom diagnosis

Perform check and repair referring to "Symptom Diagnosis" of system having a trouble.

Is there faulty condition?
YES -
Repair or replace malfunction part(s).
NO -
Go to Step 6.

6.
Check for intermittent problem

Check for intermittent problem.

Is there faulty condition?
YES -
Repair or replace malfunction part(s).
NO -
Go to Step 7.

7.
Final confirmation test

Clear DTC referring to DTC Clearance DTC Clearance.
Check DTC referring to DTC Check DTC Check.

Is there any DTC?
YES -
Go to Step 4.
NO -
End.

Customer Complaint Analysis

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

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

Customer questionnaire (example)





Problem Symptom Confirmation

Check if what the customer claimed in "Customer Questionnaire" is accurately found in the vehicle. If that symptom is found, check whether the symptom is identified as a failure. (This step should be shared with the customer if possible.)

DTC Check

Check DTC stored in BCM memory referring to DTC Check DTC Check
, record it and then clear it referring to DTC Clearance DTC Clearance. DTC indicates malfunction that occurred in the system but does not indicate whether it exists now or it occurred in the past and the normal condition has been restored now. To check which case applies, clear DTC once and check whether or not any fault exists.

Troubleshooting for DTC

Based on the DTC indicated in Step 3 and referring to applicable DTC flow, locate the cause of the trouble, namely in a sensor, wire harness, connector, BCM or other part and repair or replace faulty parts.

Body Electrical Control System Symptom Diagnosis

Check the parts or system suspected as a possible cause referring to symptom diagnosis of each system.

Check for Intermittent Problem

Check parts where an intermittent trouble is easy to occur (e.g., wire harness, connector, etc.), referring to Intermittent and Poor Connection Inspection Intermittent and Poor Connection Inspection.

Final Confirmation Test

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