Toyota Corolla (E120): Diagnosis circuit

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Check and replace ecu
Notice: start an inspection of the connector from the backside of the connector on the wire harness side with the connector connected to the ecu. When no measurement condition is specified, perform the inspection with the engine stopped and also the ignition switch on. First check the ec ...

Air bag sensor front lh
Components Replacement Hint: components: 1. Precaution 2. Disconnect battery negative terminal 3. Remove air bag sensor front lh Disconnect the connector from the airbag sensor front lh.  remove the 2 bolts and airbag sensor front lh. 4. Inspect air bag sensor front lh ...

Circuit description
Shifting from 1st to o/d is performed in combination with on and off of the shift solenoid valve s1 and s2 controlled by ecm. If an open or short circuit occurs in either of the solenoid valves, the ecm controls the remaining normal solenoid valve to allow the vehicle to be operated smoothly ...