Engine and Emission Control System Check

Engine and Emission 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. DTC / freeze frame data check, record and clearance
Check for DTC (current and pending DTC).
Is there any DTC(s)?
YES
Print DTC and freeze frame data or write them down and clear them by referring to DTC Clearance DTC Clearance
, and go to Step 3.
NO
Go to Step 4.
3. Visual inspection
Perform visual inspection.
Is there any faulty condition?
YES
Repair or replace faulty part, and go to Step 11.
NO
Go to Step 5.
4. Visual inspection
Perform visual inspection.
Is there any faulty condition?
YES
Repair or replace faulty part, and go to Step 11.
NO
Go to Step 8.
5. Trouble symptom confirmation
Confirm trouble symptom.
Is trouble symptom identified?
YES
Go to Step 6.
NO
Go to Step 7.
6. Rechecking and recording DTC / freeze frame data
Recheck for DTC (current and pending DTC) and freeze frame data.
Is there any DTC(s)?
YES
Go to Step 9.
NO
Go to Step 8.
7. Rechecking and recording DTC / freeze frame data
Recheck for DTC (current and pending DTC) and freeze frame data.
Is there any DTC(s)?
YES
Go to Step 9.
NO
Go to Step 10.
8. Engine basic inspection and engine symptom diagnosis
Perform engine basic inspection and engine symptom diagnosis.
Is there any faulty condition?
YES
Check and repair faulty part(s), and go to Step 11.
NO
Go to Step 10.
9. Troubleshooting for DTC
Perform troubleshooting for applicable DTC.
Are check and repair complete?
YES
Go to Step 11.
NO
Check and repair faulty part(s), and go to Step 11.
10. Intermittent problem check
Check for intermittent problems by referring to "Intermittent Problem Check".
Is there any faulty condition?
YES
Repair or replace faulty part(s), and go to Step 11.
NO
Go to Step 11.
11. Final confirmation test
Perform final confirmation test.
Is there any problem symptom, DTC or abnormal condition?
YES
Go to Step 6.
NO
End.

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). DTC Check

If DTC is indicated, print it and freeze frame data or write them down and then clear them. DTC Clearance

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. Visual Inspection

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 DTC Check
for checking procedure.

Step 8: Engine Basic Inspection and Engine Symptom Diagnosis

1) Perform basic engine inspection. Engine Basic Inspection
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. Intermittent Connection and Poor Contact Inspection

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.