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

- Check the battery positive voltage.
Voltage: 11 – 14 v (engine stopped)
- visually check the wire harness, connectors and fuses for open and
short, etc.
- warm up the engine to the normal operating temperature.
- confirm the problem symptoms and conditions, and check for dtcs
according to the related chart.
Ok go to step 5

4 Dtc chart
- 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
- 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
- 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
- Repair the affected system or part in accordance with the instructions
in step 6.

8 Confirmation test
- 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
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 ...
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:
Optimal use of the multimedia system
On the “Sound Settings” screen, sound quality (Treble/Mid/ Bass), volume balance
can be adjusted.
How to adjust the sound settings and sound quality
1 2 3 Select “-” or “+” to adjust the treble, mid or bass to a level between
-5 and 5.
4 5 Select “Front” or “Rear” to adjust the front/rear aud ...
Inspection
1. Inspect defogger relay (marking: def)
Remove the defogger relay from the instrument panel
j/b.
inspect the defogger relay.
Standard:
If the result is not as specified, replace the relay ...
Circuit description
The o/d main switch (transmission control switch) is a momentary type switch.
When pressing the o/d main
switch, the o/d off indicator light lights up and the ecm prohibits shifting
into o/d, and when pressing it
once again, the o/d off indicator light goes off and the ecm allows shifting
in ...