Toyota Corolla (E120): Door courtesy switch circuit

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Warning lights
Warning lights inform the driver of malfunctions in the indicated vehicle’s systems. *1: Vehicles without a smart key system: These lights turn on when the engine switch is turned to the “ON” position to indicate that a system check is being performed. They will turn off after the engi ...

How to proceed with troubleshooting
The hand–held tester can be used at step 3, 4, 6, 9. 1 Vehicle brought to workshop 2 Customer problem analysis 3 Connect the obd ii scan tool or hand–held tester to dlc3 4 Check and clear dtc and freeze frame data 5 Visual inspection 6 Setting the check mode diagnosis 7 Proble ...

Oxygen sensor monitor (front and rear o2s system)
Preconditions The monitor will not run unless: mil is off  drive pattern  connect the obd ii scan tool to the dlc3 to check monitor status and preconditions.  Start the engine and allow it to idle for 2 minutes or more.  Drive the vehicle at 25 mph ...