Toyota 4A-F Repair Manual page 151

EFI SYSTEM
/0 Att
Flow
... Meter)
1
'0" ,
,.,.
To fCU
IFC)
Eleclroni4; Control System
-
Circuit Opening Relay
To Stoll n ., Retty IAWl
Igf>ition S�ch (ST11 10Iherl)
To
Fl o w
Fuel Pump Switch
tAir
INS PECTION OF CIRCUIT OPENING RElAY
(AE wlo Air Flow Meter, AT and AWl
1 . INSPECT RElAY CONTINUITY
(a) Using an ohmmeter. cheCk that there is continuity
between terminel,
(til
CheCk thai there i s continuity between terminl's B
and FC.
Icl Chack thai there is no cont inuity between terminals B
and FP.
I f continuity is not as specified. replllCe the relay.
Ill )
2. INSPECT RELAY OPERATION
pply billery voltage across t6rminals STA and EI.
A
Using an ohmmeter. check that there is cont inUity
Ibl
between terminals
lei
Apply ballery \loltage across terminals B lind
Check that there is C()(Itinuity between terminal, B
Icl)
Inc! FP.
II
operation is not as specified. replace the relay,
fCU
To
TA
S
Circuit
Opening
R,IIV
Meter)
STA and E l .
B IMId FP.
FI·1iI1
ISTA)
FC.