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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:

Replacement
1. Remove radiator grille subassy 2. Remove front bumper cover 3. Remove fog lamp assy lh Remove a nut and release a claw.  remove the fog light assy lh. 4. Put vehicle these conditions 5. Adjust fog light aim 6. Check fog light aim ...

Front suspension
Service data *1: Ground clearance of front wheel center *2: ground clearance of lower suspension arm front bolt center *3: ground clearance of axle beam set bolt center *4: ground clearance of rear wheel center Torque specification ...

Ecm (1zzfe)
Replacement 1. Disconnect battery negative terminal 2. Remove glove compartment door assy 3. Remove ecm Remove the 2 clips using a clip remover. Then, open the cover. Disconnect the 4 ecm connectors.  remove the wire harness from the wire harness clamp. Remove the 2 ...

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