4E-9 ABS:
Customer questionnaire (Example)
Problem symptom confirmation
Check if what the customer claimed in “Customer Questionnaire” is actually found in the vehicle and if that symptom is
found, whether it is identified as a failure. (This step should be shared with the customer if possible.) Check warning
lamps related to brake system referring to “EBD Warning Lamp (Brake Warning Lamp) Check: ” and “ABS 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: ABS Check: ” to proceed the diagnosis.
When DTC which is recorded at DTC check procedure is not indicated anymore after performing DTC clearance, ABS
(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 drive the vehicle at 40 km/h for more than a minute and check if any trouble symptom (such as abnormal lighting
of ABS warning light) exists.
If the malfunction DTC is confirmed again at ignition switch ON, driving test as described is not necessary. Proceed to
Step 3.
I2RH01450014-01
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