Engine System Check
Engine System Check
Refer to the following items for the details of each step.
1. Customer complaint analysis
Perform customer complaint analysis referring to Step 1: Customer Complaint Analysis.
Was customer complaint analysis performed?
YES
Go to Step 2.
NO
Perform customer complaint analysis.
2. DTC(s) / Freeze frame data check, record and clearance
Check for DTC (including pending DTC) referring to the Step 2: DTC(s) / Freeze Frame Data Check, Record and Clearance.
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 referring to the Visual Inspection Visual Inspection.
Is there any faulty condition?
YES
Repair or replace malfunction part, and go to Step 11.
NO
Go to Step 5.
4. Visual inspection
Perform visual inspection referring to the Visual Inspection Visual Inspection.
Is there any faulty condition?
YES
Repair or replace malfunction part, and go to Step 11.
NO
Go to Step 8.
5. Trouble symptom confirmation
Confirm trouble symptom referring to the Step 5: Trouble Symptom Confirmation.
Is trouble symptom identified?
YES
Go to Step 6.
NO
Go to Step 7.
6. Rechecking and record of DTC / Freeze frame data
Recheck for DTC and freeze frame data referring to DTC Check DTC Check.
Is there any DTC(s)?
YES
Go to Step 9.
NO
Go to Step 8.
7. Rechecking and record of DTC / Freeze frame data
Recheck for DTC and freeze frame data referring to DTC Check DTC Check.
Is there any DTC(s)?
YES
Go to Step 9.
NO
Go to Step 10.
8. Engine basic inspection and engine symptom diagnosis
Check and repair according to Engine Basic Inspection Engine Basic Inspection
and Engine Symptom Diagnosis Engine Symptom Diagnosis.
Are check and repair complete?
YES
Check and repair according to applicable DTC diag. flow table.
Go to Step 11.
NO
Check and repair malfunction part(s).
9. DTC flow
Check and repair according to applicable DTC diag. flow.
Are check and repair complete?
YES
Check and repair malfunction part(s).
NO
Check and repair according to applicable DTC diag. flow table.
Go to Step 11.
10. Intermittent problems check
Check for intermittent problems referring to Step 10: Intermittent Problems Check.
Is there any faulty condition?
YES
Repair or replace malfunction part(s), and go to Step 11.
NO
Go to Step 11.
11. Final confirmation test
Clear DTC if any.
Perform final confirmation test referring to Step 11: 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 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: DTC(s) / Freeze Frame Data Check, Record and Clearance
First, check DTC (including pending DTC), referring to DTC Check DTC Check. If DTC is indicated, print it and freeze frame data or write them down and then clear them by 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, check the symptom in question according to Step 4 and recheck DTC according to Step 6 and 7.
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.
NOTE:
- If only DTC P0461 (Fuel level sensor circuit performance problem) is indicated in this step, perform Visual Inspection according to Step 3 and then proceed to P0461 DTC P0461: Fuel Level Sensor (Gauge) Circuit Performance Problem.
- If only Automatic transmission DTCs (P0705 to P1895, P2763 and P2764) are indicated in this step, perform trouble diagnosis according to DTC Table.
Step 5: Trouble Symptom Confirmation
Based on information obtained in Step 1 Customer complaint analysis and Step 2 DTC(s) / freeze frame data check, confirm trouble symptoms. Also, reconfirm DTC according to "DTC Confirmation Procedure" described in each "DTC Diagnosis".
Step 6 and 7: Rechecking and Record of DTC / Freeze Frame Data
Refer to DTC Check DTC Check
for checking procedure.
Step 8: Engine Basic Inspection and Engine Symptom Diagnosis
Perform basic engine check according to the Engine Basic Inspection Engine Basic Inspection
first. When the end of the flow table has been reached, check the parts of the system suspected as a possible cause referring to Engine Symptom Diagnosis Engine Symptom Diagnosis
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 9: DTC Flow (See each DTC Diag. Flow)
Based on the DTC indicated in Step 6 or 7 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 10: 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 11: 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, perform DTC confirmation procedure and confirm that no DTC is indicated.