Toyota Corolla (E120): Ecm power source circuit

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Mechanical system tests
1. Perform mechanical system tests Measure the stall speed. The object of this test is to check the overall performance of the transaxle and engine by measuring the stall speeds in the d and r positions. Notice: Do the test at normal operating atf temperature 50 to 80 °c (122 to ...

Have the malfunction repaired immediately. (vehicles with a smart key system)
After taking the specified steps to correct the suspected problem, check that the warning message and light go off. ■Warning buzzer ...

Circuit description
The rear heated oxygen sensor is used to monitor oxygen concentration in the exhaust gas. For optimum catalytic converter operation, the air fuel mixture must be maintained near the ideal ”stoichiometric” ratio. The heated oxygen sensor output voltage changes suddenly in the vicinity of ...