Toyota 2VZ-FE Manual page 240

[10] CIRCUIT INSPECTION
Proceed with diagnosis of each circuit in accordance with the inspection order confirmed in [6] and [8].
Determine whether the cause of the problem is in the sensors, actuators, wire harness and connectors,
or the ECU.
[11] REPAIRS
After the cause of the problem is located, perform repairs by following the inspection and replacement
procedures in this manual.
[12] CONFIRMATION TEST
After completing repairs, confirm not only that the problem is eliminated, but also perform diagnostic code
check etc. again to make sure the entire engine control system is operating correctly.
ENGINE TROUBLESHOOTING – How to Proceed with Troubleshooting
TR–3