Toyota Corolla Quiz
Diagnostics

How to proceed with troubleshooting

In this manual: Diagnostics
Introduction — 31Preparation — 32Service specifications — 19Diagnostics — 497Engine control system — 6Fuel — 13Emission control — 28Exhaust — 3Cooling — 13Lubrication — 7Ignition — 3Starting & charging — 13Front suspension — 12Rear suspension — 9Tire & wheel — 1Drive shaft / propeller shaft — 15Brake — 42Automatic transmission / trans — 47Clutch — 19Steering column — 9Power steering — 11Heater & air conditioner — 20Supplemental restraint system — 27Seat belt — 12Lighting — 18Wiper & washer — 9Audio & visual — 12Wiring — 1Communication system — 1Windshield/windowglass/mirror — 31Seat — 10Theft deterrent & door lock — 10Sliding roof/convertible — 8Engine hood/door — 12Exterior/interior trim — 20Vehicle control system — 1Cruise control — 5Maintenance — 8
~1min read
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 7There 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 dtc’s are recorded, and the problem is not identified, perform circuit inspection of the other dtc’s.
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 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.

Test yourself

A quick Toyota Corolla quiz: every answer comes with an explanation and a link to the manual page.