Toyota Corolla (E120): Door key lock and unlock switch circuit

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Emission inspection and maintenance (I/M) programs
Some states have vehicle emission inspection programs which include OBD (On Board Diagnostics) checks. The OBD system monitors the operation of the emission control system. If the malfunction indicator lamp comes on The OBD system determines that a problem exists somewhere in the emission cont ...

On–vehicle inspection
1. Inspect refrigerant pressure with manifold gauge set  this is a method in witch the trouble is located by using a manifold gauge set. Read the manifold gauge pressure when the these conditions are established. Test conditions: temperature at the air inlet with the switch set ...

Fuel information
You must only use unleaded gasoline in your vehicle. Select octane rating 87 (Research Octane Number 91) or higher. Use of unleaded gasoline with an octane rating lower than 87 may result in engine knocking. Persistent knocking can lead to engine damage. At minimum, the gasoline you use should ...