Fuel pump control circuit
EXPLANATION
When the engine is rotated, the flow of current from the ignition switch terminalST2 to terminal STA in the ECM (STA signal).
At the STA signal, N1 and N2 be the input to the ECM, the transistor (Tr) to ON,current flows to the relay coil on the F / P (fuel pump), a relay switch ON, andcurrent flows to the fuel pump. Then the fuel pump working.
During the N1 and N2 signal is generated (engine life), the ECM keeps Tr ONfixed (fuel pump relay ON) and the fuel pump still works.
Wiring Diagram
EXAMINATION PROCEDURE
CHECK THE FUEL PUMP TO WORK
1.Turn on the machine.
2.Check that the fuel pulse damper screw pressing it.
standard:
Fuel pressure pulse damper screw her.
INSTRUCTIONS:
After engine start, check that there was the sound of fuel pump working.
Fuel pumps may be operated by the Active Test.
All New Avanza & The All New Avanza Veloz
EXPLANATION
When the engine is rotated, the flow of current from the ignition switch terminalST2 to terminal STA in the ECM (STA signal).
At the STA signal, N1 and N2 be the input to the ECM, the transistor (Tr) to ON,current flows to the relay coil on the F / P (fuel pump), a relay switch ON, andcurrent flows to the fuel pump. Then the fuel pump working.
During the N1 and N2 signal is generated (engine life), the ECM keeps Tr ONfixed (fuel pump relay ON) and the fuel pump still works.
CHECK THE FUEL PUMP TO WORK
1.Turn on the machine.
2.Check that the fuel pulse damper screw pressing it.
standard:
Fuel pressure pulse damper screw her.
INSTRUCTIONS:
After engine start, check that there was the sound of fuel pump working.
Fuel pumps may be operated by the Active Test.
All New Avanza & The All New Avanza Veloz
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