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Toyota Corolla Repair Manual: 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

General information
There are many ecu controlled systems used in the corolla. In general, ecu controlled system are considered to be very intricate and require a high level of technical knowledge and expert skill t ...

Customer problem analysis
Hint: in troubleshooting, the problem symptoms must be confirmed accurately, meaning that all preconceptions must be set aside in order to make an accurate judgement. To ascertain what the ...

Other materials:

How to proceed with troubleshooting
1 Vehicle brought in 2 Customer problem analysis check and symptom check 3 Problem symptoms table Without applicable symptoms, proceed to a  with applicable symptoms, proceed to b 4 Perform troubleshooting in the following method, depending on malfunction symptom Ter ...

Inspection procedure
1 Inspect dlc3 terminal voltage(ts terminal) Turn the ignition switch to on. measure voltage between terminals ts and cg of dlc3. Ok: voltage: 10 14 v 2 Check harness and connector(dlc3 body ground) Check for open and short circuit in harness and connector between ter ...

Listening to a USB memory device
Connecting a USB memory device enables you to enjoy music from the vehicle speakers. Touch USB on the audio source selection screen. Connecting a USB memory device Audio control screen Pressing the AUDIO button displays the audio control screen from any screens of the selected source. 1 ...

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