A/T System Check
A/T System Check
Refer to the following items for the details of each step.
1.
Customer complaint analysis
Perform customer complaint analysis.
Was customer complaint analysis performed according to instruction?
YES -
Go to Step 2.
NO -
Perform customer complaint analysis.
2.
DTC / Freeze frame data check, record and clearance
Check for DTC (including 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.
Go to Step 3.
NO -
Go to Step 4.
3.
Visual inspection
Perform visual inspection.
Is there any faulty condition?
YES -
Repair or replace malfunction part.
Go to Step 11.
NO -
Go to Step 5.
4.
Visual inspection
Perform visual inspection.
Is there any faulty condition?
YES -
Repair or replace malfunction part.
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 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.
A/T basic check and A/T trouble diagnosis
Check and repair according to A/T Basic Check A/T Basic Check
and A/T Symptom Diagnosis A/T Symptom Diagnosis.
Are check and repair complete?
YES -
Go to Step 11.
NO -
Check and repair malfunction part(s).
Go to Step 11.
9.
Troubleshooting for DTC
Check and repair according to applicable DTC diag. flow.
Are check and repair complete?
YES -
Go to Step 11.
NO -
Check and repair malfunction part(s).
Go to Step 11.
10.
Check for intermittent problem
Check for intermittent problem.
Is there any faulty condition?
YES -
Repair or replace malfunction part(s).
Go to Step 11.
NO -
Go to Step 11.
11.
Final confirmation test
Clear DTC if any.
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 such a inspection form will facilitate collecting information to the point required for proper analysis and diagnosis.
NOTE:
The form is a standard sample. It should be modified according to characteristic of each market.
Customer problem inspection form (example)
Step 2. DTC / Freeze Frame Data Check, Record and Clearance
First, referring to DTC Check DTC Check
, check DTC (including pending DTC). If DTC exists, print or write down DTC and freeze frame data and then clear them by referring to DTC Clearance DTC Clearance. DTC indicates malfunction in the system but it is not possible to know from it whether the malfunction is occurring now or it occurred in the past and normal condition has been restored. In order to know that, check symptom in question according to Step 5 and then recheck DTC according to Step 6.
Diagnosing a trouble based on the DTC in this step only or failure to clear the DTC in this step may result in an faulty diagnosis, trouble diagnosis of a normal circuit or difficulty in troubleshooting which is otherwise unnecessary.
Step 3 and Step 4. Visual Inspection
As a preliminary step, be sure to perform visual check of the items that support proper function of the A/T and engine referring to Visual Inspection Visual Inspection.
Step 5. Trouble Symptom Confirmation
Check trouble symptoms based on information obtained in Step 1. Customer Complaint Analysis
and Step 2. DTC / Freeze Frame Data Check, Record and Clearance.
Also, recheck DTC according to "DTC Confirmation Procedure" described in each DTC flow.
Step 6 and Step 7. Recheck and Record of DTC / Freeze Frame Data
Refer to DTC Check DTC Check
for checking procedure.
Step 8. A/T Basic Check and A/T Trouble Diagnosis
Perform A/T basic check according to A/T Basic Check A/T Basic Check
first. When the end of the flow has been reached, check the parts of the system suspected as a possible cause referring to A/T Symptom Diagnosis A/T Symptom Diagnosis
and based on symptoms appearing on the vehicle (symptoms obtained through steps of customer complaint analysis, trouble symptom confirmation and/or A/T basic check) and repair or replace faulty parts, if any.
Step 9. Troubleshooting for DTC
Based on the DTC indicated in Step 6 and 7 and referring to applicable DTC flow, locate the cause of the trouble, namely in a sensor, switch, wire harness, connector, actuator, TCM or other part and repair or replace faulty parts.
Step 10. 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
and related circuit of DTC recorded in Step 2.
Step 11. Final Confirmation Test
Confirm that the problem symptom has gone and the A/T is free from any abnormal conditions.
If what has been repaired is related to the malfunction DTC, clear the DTC once, set conditions under which DTC was detected and A/T and/or vehicle was repaired and confirm that no DTC is indicated.