Toyota Camry Manual page 1210

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.
IG Switch
AM2
MAIN
Battery
DIAGNOSTICS
EFI Relay
EFI
Park/Neutral Position Switch
IGN
(Clutch Start Switch)
ST
STARTER
ST Relay
– ENGINE (5S–FE)
CIR OPN Relay
(STA Signal)
(NE Signal)
Starter
Author :
DI–183
DI01M–05
Fuel Pump
ECM
FC
Tr
STA
NE
A00325
Date :
418