Electronic Stability Program Check

Refer to the following items for the details of each step.

Step	Action	YES	NO
1	Malfunction analysis  Perform Customer complaint analysis. Perform Problem symptom confirmation. Perform DTC check, record and clearance and recheck DTC. Is there any malfunction DTC?	Go to Step 4.	Go to Step 2.
2	Driving test  Perform Step 2: Driving Test. Is trouble symptom identified?	Go to Step 3.	Go to Step 6.
3	DTC check  Perform DTC CHECK . Is it malfunction code?	Go to Step 4.	Go to Step 5.
4	ESP® check  Inspect and repair by referring to applicable DTC flow. Does trouble recur?	Go to Step 5.	Go to Step 7.
5	Brakes diagnosis  Inspect and by repair referring to Brakes Symptom Diagnosis. See PRECAUTIONS IN DIAGNOSING TROUBLES . Does trouble recur?	Go to Step 3.	Go to Step 7.
6	Check for intermittent problem  Check intermittent troubles by referring to Intermittent and Poor Connection Inspection and related circuit of trouble code recorded in Step 1. Does trouble recur?	Go to Step 4.	Go to Step 7.
7	Final confirmation test  Perform Step 7: Final Confirmation Test. Does trouble recur?	Go to Step 3.	End.

Step 1: Malfunction Analysis 

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 questionnaire form as shown in the following will facilitate collecting information to the point required for proper analysis and diagnosis.

Customer questionnaire (Example) 

Problem symptom confirmation 

If symptom in "Customer Questionnaire" is found or reproduced in the vehicle, confirm the symptom is problem or not. (This step should be done with the customer if possible.) Check warning lights related to brake system by referring to EBD WARNING LIGHT (BRAKE WARNING LIGHT) CHECK , ABS WARNING LIGHT CHECK  and ESP® WARNING LIGHT CHECK .

DTC check, record and clearance 

Perform DTC CHECK  procedure, record it and then clear it referring to DTC CLEARANCE .

Recheck DTC referring to DTC CHECK .

When DTC which is recorded at DTC check procedure is detected again after performing DTC clearance, go to Step 4: ESP® Check to proceed the diagnosis.

When DTC which is recorded at DTC check procedure is not indicated anymore after performing DTC clearance, ESP® control module does not perform the system diagnosis, or temporary abnormality may occur, therefore go to Step 2: Driving Test to proceed the diagnosis.

Step 2: Driving Test 

Test the vehicle at 40 km/h for more than a minute including left and right turns and check if any trouble symptom (such as ESP® warning light and/or ABS warning light) exists.

If the malfunction DTC is confirmed at ignition switch ON, proceed to Step 3.

If the malfunction DTC is not confirmed at ignition switch ON, proceed to Step 6.

Step 3: DTC Check 

Recheck DTC by referring to DTC CHECK .

Step 4: ESP® Check 

According to ESP® Check for the DTC confirmation in Step 3, locate the cause of the trouble, namely in a sensor, switch, wire harness, connector, actuator assembly or other part and repair or replace faulty parts.

Step 5: Brakes Diagnosis 

Check the parts or system suspected as a possible cause by referring to Brakes Symptom Diagnosis. See PRECAUTIONS IN DIAGNOSING TROUBLES and based on symptoms appearing on the vehicle (symptom obtained through Steps 1 and 2 and repair or replace faulty parts, if any).

Step 6: Check for Intermittent Problem 

Check parts where an intermittent trouble is easy to occur (e.g., wire harness, connector, etc.), and related circuit of trouble code recorded in Step 1 to 3.

Step 7: Final Confirmation Test 

Confirm that the problem symptom has gone and the ESP® is free from any abnormal conditions. If what has been repaired is related to the malfunction DTC, clear the DTC once referring to DTC CLEARANCE  and perform test driving and confirm that no DTC is indicated.