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Toyota Corolla Repair Manual: How to proceed with troubleshooting

Toyota Corolla Repair Manual / Diagnostics / ABS with EBD system / How to proceed with troubleshooting

1 Vehicle brought to workshop

2 Customer problem analysis

2 Customer problem analysis

3 Check and clear dtcs and freeze frame data

3 Check and clear dtcs and freeze frame data

4 Problem symptom confirmation

4 Problem symptom confirmation

step 5Symptom does not occur: go to step 5

5 Symptom simulationSymptom occurs: go to step 6

5 Symptom simulation

6 Dtc check

6 Dtc check

output: go to step 7

There is no output: go to step 7

7 Problem symptoms tableThere is output: go to step 8

7 Problem symptoms table

to step 10Check for fluid leakage and go to step 10

8 Dtc chart

9 Circuit inspection

9 Circuit inspection

Hint

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

10 Identification of problem

10 Identification of problem

11 Repair

11 Repair

12 Comfirmation test

12 Comfirmation test

End

End

Hint

: step 3, 6, 9, 12: diagnostic steps permitting the use of the handheld 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.

ABS with EBD system
...

Customer problem analysis check
...

Other materials:

Circuit description
Refer to dtc p0120 Dtc no. Dtc detection condition Trouble area P0121 The following condition is met 4 times. After the vehicle speed has exceeded 19 mph (30 km/h) once, the throttle position sensor output value is out of normal range when the throttle ...

Towing your vehicle with 4 wheels on the ground
To prevent damage to your vehicle, perform the following procedures before towing. 1 Shift the shift lever to N. 2 Turn the engine switch to the ACC position (without a smart key system) or ACCESSORY mode (with a smart key system). (, 166) Ensure that the audio system and other powered device ...

Replacement
Hint: installation is in the reverse order of the removal. But the installation is indicated only when it has a point. 1. Remove rear door opening trim rh 2. Remove rear door opening trim lh 3. Remove rear seat cushion assembly ( or 728) 4. Remove rear seat back assy (fixed type rear seat) ...

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