Toyota Camry Manual page 1401

DI–374
Fuel Pump Control 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 ECM (STA signal).
When the STA signal and NE signal are input to the ECM, 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 ECM keeps Tr ON (circuit opening relay ON) and the
fuel pump also keeps operating.
EFI
IG Switch
AM2
MAIN
Battery
DIAGNOSTICS
EFI Main Relay
IGN
STARTER
Park/ Neutral Position Switch
Starter Relay
– ENGINE (1MZ–FE)
Circuit Opening Relay
(STA Signal)
(NE Signal)
Starter
Author :
DI4DV–01
Fuel Pump
ECM
FC
Tr
MREL
IGSW
STA
NE
A07151
Date :
609