1A
Engine and Emission Control System Check
Numbers of each step correspond to the numbers of the items after this table.
Refer to the following items for the details of each step.
Step Action YES NO
1
icon  Customer complaint analysis
1) Perform customer complaint analysis referring to Step 1: Customer Complaint Analysis .
Was customer complaint analysis performed?
Go to Step 2.
Perform customer complaint analysis.
2
icon  Visual inspection
1) Perform visual inspection referring to Step 2: Visual Inspection .
Is there any faulty condition?
Repair or replace malfunction part, and go to Step 3.
Go to Step 3.
3
icon  DTC check, record and clearance
1) Check for DTC referring to Step 3: DTC Check, Record and Clearance .
Is there any DTC(s)?
Record and clear DTC referring to DTC Clearance:K9K and go to Step 5.
Go to Step 4.
4
icon  Engine basic inspection and fault finding – customer complaints
1) Check and repair according to Step 4: Engine Basic Inspection and Fault Finding-Customer Complaints .
Is there any faulty condition?
Repair or replace malfunction part and then go to Step 8.
Go to Step 8.
5
icon  Recheck DTC
1) Recheck DTC referring to Step 5: Recheck DTC .
Is there any DTC(s)?
Go to Step 6.
Go to Step 7.
6
icon  Troubleshooting for DTC
1) Check and repair according to applicable DTC diag. flow.
Is there any faulty condition?
Repair or replace malfunction part and then go to Step 8.
Go to Step 7.
7
icon  Intermittent problems check
1) Check for intermittent problems referring to Step 7: Intermittent Problems Check .
Is there any faulty condition?
Repair or replace malfunction part(s), and go to Step 8.
Go to Step 8.
8
icon  Final confirmation test
1) Clear DTC if any.
2) Perform final confirmation test referring to Step 8: Final Confirmation Test .
Is there any problem symptom, DTC or abnormal condition?
Go to Step 5.
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 such an inspection form will facilitate collecting information to the point required for proper analysis and diagnosis.
Customer problem inspection form (Example)
NOTE:
The form is a standard sample. It should be modified according to conditions characteristic of each market.
Step 2: Visual Inspection
As a preliminary step, be sure to perform visual check of the items that support proper function of the engine referring to Visual Inspection:K9K .
Step 3: DTC Check, Record and Clearance
First, check DTC, referring to DTC Check:K9K . If DTC is indicated, record and clear DTC by referring to DTC Clearance:K9K .
Attempt to diagnose a trouble based on DTC in this step only or failure to clear the DTC in this step will lead to incorrect diagnosis, trouble diagnosis of a normal circuit or difficulty in troubleshooting.
Step 4: Engine Basic Inspection and Fault Finding-Customer Complaints
Perform basic engine check according to Engine Basic Inspection:K9K first. When the end of the flow table has been reached, check the parts of the system suspected as a possible cause referring to Fault Finding - Customer Complaints:K9K and based on symptoms appearing on the vehicle (symptoms obtained through steps of customer complaint analysis, trouble symptom confirmation and/or basic engine check) and repair or replace faulty parts, if any.
Step 5: Recheck DTC
Refer to DTC Check:K9K for checking procedure.
Step 6: Troubleshooting for DTC (See each DTC Diag. Flow)
Based on the DTC indicated in Step 5 and referring to the applicable DTC diag. flow, locate the cause of the trouble, namely in a sensor, switch, wire harness, connector, actuator, ECM or other part and repair or replace faulty parts.
Step 7: Intermittent Problems Check
Check parts where an intermittent trouble is easy to occur (e.g., wire harness, connector, etc.), referring to Intermittent and Poor Connection Inspection and related circuit of DTC recorded in Step 2.
Step 8: Final Confirmation Test
Confirm that the problem symptom has gone and the engine is free from any abnormal conditions. If what has been repaired is related to the DTC, clear the DTC once and then recheck DTC and confirm that no DTC is indicated.