Circuit Opening Relay - Toyota Supra 1990 Manual

FI-110
Continuity
Continuity
[. fl::::J
10
1
01+-°
- 1 - -
L~
Continuity
[J:CJ
°
o
°
EFI SYSTEM -
Electronic Control System
Circuit Opening Relay
To Ignition Switch (STI)-..----ECU (STA)
.--_ _ _ _ _ _ _ _ _
~--~
ECU +B (+B 1)
EFI Main Relay
Check Connector
B
L--_------;
F P
~
Fuel Pump
Control Relay
FC
Fuel Pump Switch
(Air Flow Meter)
(7M-GE)
STA
El
,
, - - - ,
1
Continuity
FI1909
<f>
Battery
FI1910
FI1992
INSPECTION OF CIRCUIT OPENING RELAY
1. INSPECT RELAY CONTINUITY
(a) Using an ohmmeter, check that there is continuity be-
tween terminals ST A and E 1.
(b) Check that there is continuity between terminals Band
FC.
(c) Check that there is no continuity between terminals
Band FP.
If continuity is not as specified, replace the relay.
2.
INSPECT RELAY OPERATION
(a) Apply battery voltage across terminals ST A and E
1.
(b) Using an ohmmeter, check that there is continuity be-
tween terminals Band FP.
(c) Apply battery voltage across terminals Band FC.
(d) Check that there is continuity between terminals Band
FP.
If operation is not as specified, replace the relay.