Toyota Corolla Repair Manual: How to proceed with troubleshooting

1 Vehicle brought to workshop

2 Customer problem analysis

3 Check and clear dtcs and freeze frame data

4 Problem symptom confirmation

Symptom does not occur: go to step 5

Symptom occurs: go to step 6

5 Symptom simulation

6 Dtc check

There is no output: go to step 7

There is output: go to step 8

7 Problem symptoms table

Check for fluid leakage and go to step 10

8 Dtc chart

9 Circuit inspection

Hint

: when 2 or more dtc’s are recorded, and the problem is not identified, perform circuit inspection of the other dtc’s.

10 Identification of problem

11 Repair

12 Comfirmation test

End

Hint

: step 3, 6, 9, 12: diagnostic steps permitting the use of the hand–held tester.

Fail safe function:

when a failure occurs in the abs system, the abs warning light is lit and the abs operation is prohibited.

In addition to this, when the failure which disables the ebd operation occurs, the brake warning light is lit as well and the ebd operation is prohibited.