Toyota 3F-E - Engine Sometimes Stalls

BAD
CHECK AIR FLOW METER
(See page FI-62)
OK
Air flow meter
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EFI SYSTEM — Troubleshooting
FI-13
OK CONTINUED FROM PAGE FI-12
CHECK COLD START INJECTOR
(See page FI-50)
RECHECK FUEL PRESSURE
(See page FI-45)
CHECK INJECTORS
(See page FI-55)
OK
CHECK FEI ELECTRONIC CIRCUIT
USING VOLT/OHMMETER
(See page FI-27)
CHECK DIAGNOSIS SYSTEM
Check for output of diagnostic code.
(See page FI-21)
Normal code
1. Cold start injector (See page FI-50)
BAD
2. Cold start injector time switch
(See page FI-72)
1. Fuel pump (See page FI-44)
BAD
2. Fuel filter
3. Fuel pressure regulator (See page FI-53)
Injection condition
BAD
1. Wiring connections
BAD
J
2. Power to ECU
(1)
Fusible links
(2)
Fuses
(3)
EFI main relay (See page FI-70)
3.
Air flow meter (See page FI-62)
4.
Water temp. sensor (See page FI-73)
5.
Air temp. sensor (See page FI-62)
6.
Injection signal circuit
(1)
Injector wiring
(2)
ECU (See page FI-77)
SYMPTOM - ENGINE SOMETIMES STALLS
Diagnostic code(s) (See pages FI-24, 25)
Malfunction
code (s)
CHECK WIRING CONNECTORS AND
RELAYS
Check for signal change when the
connector or relay is slightly tapped or
wiggled.
1. Connectors
BAD
2. EFI main relay (See page FI-70)
3. Circuit opening relay (See page FI-71)
I
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