Toyota Corolla (E120): How to proceed with troubleshooting

Hint

: carry out troubleshooting in accordance with the procedures on the following page. Here, only the basic procedures are shown. Details are provided in the diagnostics section, showing the most effective methods for each circuit. Confirm the troubleshooting procedures first for the relevant circuit before beginning troubleshooting of that circuit.

1 Vehicle brought to workshop

2 Customer problem analysis

2 Customer problem analysis

  1.  ask the customer about the conditions and environment when the problem occurred.

  1. Check the battery positive voltage.

    Voltage: 11 – 14 v (engine stopped)

  2.  visually check the wire harness, connectors and fuses for open and short, etc.
  3.  warm up the engine to the normal operating temperature.
  4.  confirm the problem symptoms and conditions, and check for dtcs according to the related chart.

Ok go to step 5

4 Dtc chart

4 Dtc chart

  1. Check the results obtained in step 3, then confirm the inspection procedures for the system or the part which should be checked using the dtc chart.

Go to step 6

5 Problem symptoms chart

  1. Check the results obtained in step 3, then confirm the inspection procedures for the system or the part which should be checked using the problem symptoms table.

6 Circuit inspection or parts inspection

6 Circuit inspection or parts inspection

  1. Confirm the circuit for the system or the part which should be checked using the problem symptoms table or the results obtained in step 4.

7 Repair

7 Repair

  1. Repair the affected system or part in accordance with the instructions in step 6.

8 Confirmation test

8 Confirmation test

  1. After completing repairs, confirm that the problem has been solved (if the problem does not recur, perform a confirmation test under the same conditions and in the same environment as when it occurred for the first time).

End

End

    Share this page:

    Other materials:

    Brake
    On–vehicle inspection 1. Inspect brake line pipes and hoses Hint: work in a well–lighted area. Turn the front wheels fully to the right or left before begining.  check all the brake lines and hoses for: damage wear deformation cracks corrosion leaks bends twi ...

    Check dlc3
    The vehicle’s ecm uses the iso 9141–2 for communication protocol. The terminal arrangement of the dlc3 complies with sae j1962 and matches the iso 9141–2 format. Hint: if the display shows unable to connect to vehicle when you have connected the cable of the obd ii scan tool or the h ...

    Inspection procedure
    Hint: if different dtcs related to different systems that have terminal e2 as the ground terminal are output simultaneously, terminal e2 may be open. If dtc p0441 (purge flow), p0446 (vsv for ccv), p0451, p0452 or p0453 (evaporative pressure sensor) is output with dtc p0442 or p0456, ...