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 lamps related to brake system referring to
“EBD Warning Lamp (Brake Warning Lamp) Check in Section 4E”, “ABS Warning Lamp Check in Section 4E” and
“ESP

® Warning lamp 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.

I6JB01460011-02

4F-12 Electronic Stability Program:

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 lamp and/or ABS warning lamp) 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 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 referring to “Brakes Symptom Diagnosis in Section 4A” 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: Intermittent Problem Check
Check parts where an intermittent trouble is easy to occur (e.g., wire harness, connector, etc.), referring to
“Intermittent and Poor Connection Inspection in Section 00 in related manual” 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.

ESP

® Warning lamp Check

S5JB0E4604022

1) Turn ignition switch ON.
2) Check that ESP

® warning lamp (1) comes ON for

about 2 seconds and then goes off.
If any faulty condition is found, advance to “ESP

Warning Lamp Does Not Come ON at Ignition Switch
ON” or “ESP

® Warning Lamp Comes ON Steady”.

ABS Warning Lamp Check

S5JB0E4604002

Refer to “ABS Warning Lamp Check in Section 4E”.

EBD Warning Lamp (Brake Warning Lamp)
Check