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Toyota Corolla Repair Manual: Fuel pump control circuit

Toyota Corolla Repair Manual / Diagnostics / Sfi system / Fuel pump control circuit

Inspection procedure
1 Inspect ecm(+b voltage) Turn the ignition switch on.  measure the voltage between the terminals of the e4 and e6 ecm connectors. Standard: 2 Check harness and connector(ec ...

Circuit description
In the diagram below, when the engine is cranked, current flows from terminal st2 of the ignition switch to the starter relay coil and also current flows to terminal sta of the ecm (sta signal). ...

Other materials:

Circuit description
The ecm compares the two waveforms of the heated oxygen sensors located before and after the catalyst to determine whether or not the catalyst performance has deteriorated. Airfuel ratio feedback compensation keeps the waveform of the heated oxygen sensor in front of the catalyst alternate ...

Audio & visual system
Preparation Sst Recomended tools Equipment ...

Brake
Onvehicle inspection 1. Inspect brake line pipes and hoses Hint: work in a welllighted area. Turn the front wheels fully to the right or left before begining.  check all the brake lines and hoses for: damage wear deformation cracks corrosion leaks bends twists ...

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