Toyota Tacoma manuals

Toyota Corolla Repair Manual: 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).

When the sta signal and ne signal are input to the ecm, tr is turned on, current flows to the coil of the circuit opening relay, the relay switches on, power is supplied to the fuel pump and the fuel pump operates.

While the ne signal is generated (engine running), the ecm keeps tr on (circuit opening relay on) and the fuel pump also keeps operating.

Wiring diagram

Wiring diagram

Inspection procedure

Fuel pump control circuit
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Inspection procedure
Handheld tester: 1 Perform active test by handheld tester(operation of circuit opening relay) Connect the handheld tester to the dlc3.  turn the ignition switch on and push the handhe ...

Other materials:

Precheck
1. Srs warning light check Turn the ignition switch to the on position and check that the srs warning light lights up. check that the srs warning light goes out after approx. 6 Seconds. Hint: when the ignition switch is at on and the srs warning light remains on or flashes, the ...

Inspection procedure
1 Check p squib circuit(airbag sensor assy center instrument panel passenger airbag assy) Disconnect the negative () terminal cable from the battery, and wait at least for 90 seconds.  disconnect the connectors between the airbag sensor assy center and the instrument panel pas ...

Onvehicle inspection
1. Inspect airfuel ratio compensation system Hint: you can also check the system by choosing data monitor, then o2 sensor output voltage on the monitor of the handheld tester. Connect the handheld tester to the terminal 23 (ox1a) @ 7 (e1) and 21 (ox1b) @ 7 (e1) of the ecm. Cau ...

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