Toyota Corolla (E120): How to proceed with troubleshooting

1 Vehicle brought to workshop

2 Customer problem analysis

2 Customer problem analysis

3 Check and clear dtc

3 Check and clear dtc

4 Problem symptom confirmation

4 Problem symptom confirmation

5 Symptom simulation

5 Symptom simulation

6 Dtc check

6 Dtc check

7 Dtc chart

7 Dtc chart

8 Problem symptoms table

8 Problem symptoms table

9 Circuit inspection

9 Circuit inspection

10 Identification of problem

10 Identification of problem

11 Parts inspection

11 Parts inspection

12 Repair

12 Repair

13 Confirmation test

13 Confirmation test

End

End

Customer problem analysis check

Pre–check

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    Torque converter clutch and drive plate (atm)
    Inspection 1. Inspect torque converter clutch assy Inspect the one–way clutch.  Set sst into the inner race of the one–way clutch. Sst 09350–32014 (09351–32010)  set sst so that it fits in the notch of the converter hub and outer race of the one–way clutch. ...

    Thermostat
    Replacement 1. Remove engine under cover rh 2. Drain coolant 3. Remove fan and generator v belt 4. Remove generator assy Disconnect the wire clamp from the wire clip on the rectifire end frame.  remove the rubber cap and nut, and disconnect the alternator wire.  d ...

    Inspection procedure


    Hand–held tester: 1 Check operation of stop light Check if the stop lights go on and off normally when the brake pedal is depressed and released. 2 Inspect stop light switch assy Check the resistance between the terminals when the switch is turned on and off. Standard: ...