Toyota Corolla (E120) 2002–2008 Repair Manual / Introduction / How to troubleshoot ecu controlled
systems
Toyota Corolla (E120): How to troubleshoot ecu controlled systems
- General information
- How to proceed with troubleshooting
- Customer problem analysis
- Symptom confirmation and diagnostic trouble code
- Symptom simulation
- Diagnostic trouble code chart
- Problem symptoms table
- Circuit inspection
- Electronic circuit inspection procedure
Other materials:
Content of driving information
■ Display items
Speedometer display/Driving
range
Fuel economy
Eco Driving Indicator/Driving
range
■ Speedometer display/Driving
range
Speedometer display
Driving range
Displays driving range with remaining
fuel. Use the displayed values
as a reference only.
This distance is computed ...
Turning on light switch does not light up night time
illumination of radio receiver
Wiring diagram
Inspection procedure
1 Inspect radio receiver assy(ill+, ill–)
Check that the voltage between terminals at each condition,
as shown in the chart.
Standard:
Repair or replace harness or connector ...
How to proceed with troubleshooting
1 Vehicle brought to workshop
2 Customer problem analysis
3 Check and clear dtcs and freeze frame data
4 Problem symptom confirmation
Symptom does not occur: go to
step 5
Symptom occurs: go to step 6
5 Symptom simulation
6 Dtc check
There is no
output: go to step 7
There is outp ...