Toyota Land Cruiser 1988 Repair Manual page 146

EFI SYSTEM -Troubleshooting
Fl-15
l
OK
CONTINUED FROM PAGE Fl-14
CHECK FUEL PRESSURE
1. Fuel pump (See page Fl-46)
(See page Fl-47) BAD
2. Fuel filter
3. Fuel pressure regulator (See page Fl-55)
t
OK
CHECK INJECTORS Injection condition
(See page Fl-57) BAD
l
OK
CHECK EFI ELECTRONIC CIRCUIT
1. Wiring connections
USING VOLT/OHMMETER BAD
2. Power to ECU
(See page Fl-27) (1) Fusible links
(2) Fuses
(3) EFI main relay (See page Fl-74)
3. Air flow meter (See page Fl-66)
4. Water temp. sensor (See page Fl-77)
5. Air temp. sensor (See page Fl-66)
6. Injection signal circuit
(1) Injector wiring
(2) ECU (See page Fl-82)
7. Oxygen sensors (See page F!-80)