Engine and Emission Control System Check
Engine and Emission Control System CheckStep 1-7:
Step 8-11:
Step 1: Customer Complaint Analysis
Record details of the problem (failure, complaint) and how it occurred as described by the customer. For this purpose, use of an inspection form as shown will facilitate collecting information required for proper analysis and diagnosis.
NOTE: This form is a standard sample. It should be modified according to characteristics of each market.
Customer problem inspection form (Example)
Step 2: DTC/Freeze Frame Data Check, Record and Clearance
First, check DTC (current and pending DTC).
If DTC is indicated, print it and freeze frame data or write them down and then clear them.
Step 3 and 4: Visual Inspection
As a preliminary step, be sure to perform visual check of the items that support proper function of engine.
Step 5: Trouble Symptom Confirmation
In case that there is no DTC at Step 2:
Confirm trouble symptoms based on information obtained in Step 1: Customer Complaint Analysis and Step 2: DTC/Freeze Frame Data Check, Record and Clearance.
In case that there is any DTC at Step 2:
Recheck DTC according to "DTC Confirmation Procedure" described in each DTC troubleshooting.
Step 6 and 7: Rechecking and Recording DTC/Freeze Frame Data
Refer to DTC Check Reading Diagnostic Trouble Codes for checking procedure.
Step 8: Engine Basic Inspection and Engine Symptom Diagnosis
1. Perform basic engine inspection. Engine Symptom Diagnosis
2. If no faulty part is found in inspection procedure of "Engine basic inspection", perform Engine Symptom Diagnosis Engine Symptom Diagnosis based on symptom found in vehicle checking in the following steps.
- Customer complaint analysis
- Trouble symptom confirmation
Step 9: Perform troubleshooting for applicable DTC
Perform applicable DTC troubleshooting and repair or replace faulty parts.
Step 10: Intermittent Problem Check
In case that there is no DTC at Step 2:
Check for intermittent problem.
In case that there is any DTC at Step 2:
Check parts related to detected DTC (e.g., wire harness, connector, etc.).
Step 11: Final Confirmation Test
Confirm that the trouble symptom has gone and the engine is free from any abnormal conditions. If what has been repaired is related to DTC, clear DTC once, perform DTC confirmation procedure and confirm that no DTC is indicated.