Toyota Celica Supra 1986 Service And Repair Manual page 130

F1·28
EFI SYSTEM - Troubleshooting with Volt/Ohmmeter
TROUBLESHOOTING WITH VOLT/OHMMETER
PREPARATION FOR TROUBLESHOOTING
,
.
Remove the glove box door and glove box.
2. Remove the ECU with wire harness.
EFI SYSTEM CHECK PROCEDURE
NOTE:
1 . The EFi circuit can be checked by measuring the
I\
resistance and voltage et the wiring connectors of the
Ecu.
' - -
+B
2.
PerfO<m all voltage measurement with the eonneetM
v
connected.
3. Verify that the battery voltage is 11 V or above when
,\
the ignition switch is ON .
Using a voltmeter, measure the voltage at each terminal
of the wiring connector.
NOTE:
If there i s any problem, see TROUBLESHOOTING
FOR EFI ELECTRONIC CIRCUIT WITH VOLT/ OHMMETEJt
ConnectO<$ of ECU
Symbol Terminal Namt Symbol
Termina1 Name
Symbol
Termine I Nemo
Eo•
ENGINE GROUND G6 ENGINE REVOLUTION SENSOR A /C AIC MAGNET SWITCH
Eo> ENGINE GROUND
VF
CHECK CONNECTOR SPD SPEEDOMETER
No. 10 INJECTOR G ENGINE REVOLUTION SENSOR
w
WARNING LIGHT
No. 20 INUECTOR T CHECK CONNECTOR THA AIR TEMP. SENSOR
STA STARTER SWITCH VTA THROTTLE SWITCH Vs
AIR FLOW M ETER
IG1 IGNITER
Ne
ENGINE REVOLUTION SENSOR Vc AIR FLOW METER
EGA EGA VSV I l l THROTTLE SWITCH BAT BATTERY + B
E•
ENGINE GROUND KNK
KNOCK SENSOR IG SIW IGNITION SWITCH
NEUTRAL START SWITCH IA!T) IGf IGNITER
+ B MAIN RELAY
N/C
CLUTCH SWITCH IMITI
Ox OXYGEN SENSOR TCD ECT COMPUTER
ISC•
ISC MOTOR NO. 1 COl. THW WATER TEMP. SENSOR
OIL Ol. PRESSURE SWITCH
ISC>
ISC MOTOR N0.2 COl.
&
SENSOR EARTH l> ECT COM PUTER
ISC>
ISC MOTOR N0.3 COl.
E•
ENGINE GROUND
l>
ECT COM PUTER
ISC•
ISC MOTOR N0.4 COIL M·REL MAIN RELAY COIL
L>
ECT COMPUTER
...
'1~
STA
ECR
N/C
ISC
•sc
G€
G
...
ICI
THW
,,
" "
...
SPO TH•
••
vc
OAT
~
I
2 REL
•••
~
IGo
'·
ISC
3
ISC
•
Vf
T
VTA
oOL
...
0 •
••
••
•
•
TCO AIC
w
DOL
••
••
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