Toyota 4-Runner 1985 Repair Manual page 177

FI-8
EFI SYSTEM -
Inspection Precautions
FI0577
FI0630
5. Confirm that there are no fuel leaks after performing
maintenance on the fuel system.
(a) With engine stopped, turn the ignition switch
01
(b) Short circuit terminals of the fuel pump check
connector.
(c) When the pressure regulator fuel return hose (shown
in the figure at left), is pinched, the pressure within
the high pressure line will rise to about 4 kg/cm2 (57
psi, 392 kPa). In this state, check to see that there
are no leaks from any part of the fuel system.
CAUTION: Always pinch the hose. Avoid bending as it
may cause the hose to crack.