Circuit Opening Relay - Toyota 4A-FE Repair Manual

Continuity
[KJ
0
Continuity
Check
Connector
EFI SYSTEM - Electronic Control System
Fl-135
2.
INSPECT RELAY OPERATION
{a) Apply battery voltage across terminals
1 and 3.
BE0010
(b)
Using an ohmmeter, check that there is continuity
between terminals 2 and 4.
If operation is not
as
specified, replace the relay.
Circuit Opening Relay
From Ignition Switch (ST1)
~To
ECU (STA}
.-----------+----l~
To EC
u
(+Bl
I
+B
To
EFI Main
Relay
STA
FP
" - - -- --FP
(w/o Air Flow Meter)
Fuel
Pump
FC
E1
Q)
Fuel Pump Switch
Circuit
Opening
Relay
To ECU (FC)
~
I
(Air Flow Meter)
LL
=
Fl6174
INSPECTION OF CIRCUIT OPENING RELAY
(w/o Air Flow Meter)
1. INSPECT RELAY CONTINUITY
(a)
Using
an
ohmmeter, check that there
is
continuity
between terminals STA and
E1.
lb) Check that there is continuity between terminals +B
and FC.
(c) Check that there is no continuity between terminals
L _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
F1_24~21
+Band
FP.
Continuity
e
ffi
Battery
Fl2422
If continuity is not as specified, replace the relay.
2. INSPECT RELAY OPERATION
(al
Apply battery voltage across terminals ST A and E 1.
(b) Using an ohmmeter, check that there is continuity
between terminals +B and FP.