Toyota Celica Supra 1986 Service And Repair Manual page 116

Fl ·14 EFI SYSTEM - Troubl .. hooting
OK CONTINUED FROM PAGE Fl· 13
CHECK FUEl PRESSURE
1. Fuel pump (Soo page F1·441
(See page Fl-451
BAD
2. Fuel filter
3.
Fuel pressure regulator
(See page fl-521
OK
CHECK INJECTORS
BAD
Injection condition
(See page Fl-531
OK
CHECK Efl ElECTRONIC CIRCUIT
1.
W iring connection
USING VOlT/OHMMETER
BAD
2. Power to ECU
I 1 I Fusible link
(2) No.
1 ond No. 2 main relay
3.
Air flow meter
4. Water temp. unsor
5. Injection signal circuit
I 1 I
Injector wiring
121 Resistor
(3)
ECU
SYMPTOM - ENGINE SOMETIMES STALLS
CHECK DIAGNOSIS SYSTEM Diagnost ic codelsl
Check lor output of diagnostic code. M alfunction
!See page Fl-251
!See page F1·22l code lsi
Normal code
CHECK AIR FlOW METER A ir flow meter
(See page F1·58)
BAD
OK
CHECK WIRING CONNECTORS AND 1. Connector
RElAYS
BAD
2.
No.1 and No. 2 main relay
Check that there is a signal change when !See page Fl·68l
the connector or relay is •lightly tapped
3.
Circuit opening relay !See page Fl-691
Of
w iggled.