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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:

Circuit description
The side squib (rh) circuit consists of the airbag sensor assy center and front seat airbag assy (rh). It causes the srs to deploy when the srs deployment conditions are satisfied. Dtc b0110/43 is recorded when a short is detected in the side squib (rh) circuit. Wiring diagram ...

Moon roof
Use the overhead switches to open and close the moon roof and tilt it up and down. ■ Opening and closing 1 Opens the moon roof* The moon roof stops slightly before the fully open position to reduce wind noise. Press the switch again to fully open the moon roof. 2 Closes the moon roof* ...

Precheck
1. Diagnosis system Release the parking brake lever.  check the warning lights. When the ignition switch is turned on, check that the abs warning light and brake warning light goes on for 3 sec. Hint: when the parking brake is applied or the level of the brake fluid is low, the ...

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