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DI- -60
Fuel System Circuit
CIRCUIT DESCRIPTION
In the diagram below, when the engine is cranked, current flows from terminal ST of the ignition switch to
the starter relay coil and also current flows to terminal STA of ECU (STA signal).
When the STA signal and NE signal are input to the ECU, Tr is turned ON, current flows to 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 ECU keeps Tr ON (circuit opening relay ON) and the
fuel pump also keeps operating.
EFI
Battery
DIAGNOSTICS
EFI Main Relay
IGN
STA
Ignition Switch
AM2
- -
ENGINE (1RZ- -E)
Circuit Opening Relay
Starter Relay
Starter
CONTINUED
3RZ-F,3RZ-FE
Pages From Supplement
Engine ECU
FC
Fuel Pump
STA
(NE Signal)
NE
TO MODEL INDEX
DI1I1- -01
Tr
A02515
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