Toyota Land Cruiser 1988 Repair Manual page 144

EFI SYSTEM- Troubleshooting Fl-13
J
OK CONTINUED FROM PAGE Fl-12
CHECK COLD START INJECTOR 1. Cold start injector (See page Fl-52)
(See page Fl-52) BAD 2. Cold start injector time switch
(See page Fl-76)
~OK
RECHECK 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)
!
OK
CHECK INJECTORS Injection condition
(See page Fl-57) BAD
!
OK
CHECK FEI 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)
SYMPTOM- ENGINE SOMETIMES STALLS
CHECK DIAGNOSIS SYSTEM Diagnostic code(s) (See pages Fl-24, 25)
Check for output of diagnostic code. Malfunction
(See page Fl-21) code (s)
!
Normal code
CHECK AIR FLOW METER Air flow meter
(See page Fl-66) BAD
~OK
CHECK WIRING CONNECTORS AND
1. Connectors
RELAYS BAD 2. EFI main relay (See page Fl-74)
Check for signal change when the 3. Circuit opening relay (See page Fl-75)
connector or relay is slightly tapped or
wiggled.