Toyota 4A-FE Repair Manual

Fl-24 EFI SYSTEM - Troubleshooting
I
! OK
CONTINUED FROM PAGE
Fl-23
CHECK AIR FILTER ELEMENT
i OK
CHECK DIAGNOSIS SYSTEM
Check for output of diagnostic code.
(See page Fl-25)
~ Normal code
CHECK IGNITION SPARK
4A-FE {See page IG-6)
4A-GE (See page IG-1 O)
l OK
CHECK IGNITION TIMING
1. Connect terminals TE1
and E1
check connector
2. Check ignition timing.
Standard: 10° BTDC @ idle
! OK
CHECK FUEL PRESSURE
(See page Fl-9 7)
I OK
CHECK INJECTORS
(See page Fl-111)
OK
CHECK SPARK PLUGS
Standard: 0.8 mm {0.031 in.)
of the
HINT: Check compression pressure and
valve clearance if necessary.
~ OK
CHECK INTAKE VALVE
CHECK EFI ELECTRONIC CIRCUIT
USING VOLT/OHMMETER
(See page Fl-34)
I
I
;
BAD
Malfunction
code(s)
BAD
-
NO
BAD
BAD
BAD
Element - Clean
or replace
Diagnostic code(s)
4A-FE (See page Fl-28)
1.
High-tension cord(s)
2. llA or Distributor
3. Ignition coil, igniter
Ignition timing - Adjust
4A-FE (See page EM-20)
1. Fuel pump (See page Fl-94)
2. Fuel filter
3. Fuel pressure regulator
(See page Fl-1 09)
I Injection condition
1.
Spark plugs
2. Compression pressure
Minimum: 10.0 kg/cm
2
(142 psi, 981 kPa)
at 250 rpm
3. Valve clearance (Cold)
Standard: IN 0.15 - 0.25 mm
(0.006 - 0.010 in.)
EX 0.20 - 0.30 mm
(0.008 - 0.012 in.)
~ -- ---<-i Intake valve - corbon deposits
BAD
..---- - _____, - .... 1. Wiring connections
NO 2. Power to ECU
(1) Fusible link(s)
(2) Fuse(s)
(3) EFI main relay
3. Air flow meter (w/ Air flow meter)
4.
Vacuum sensor (w/o Air flow meter)
5.
Water temp. sensor
6. Intake air temp. sensor
7.
Throttle position sensor
8.
Injector signal circuit
(1) Injector wiring
(2) ECU
I
I
I
I
I

Toyota 4A-FE Specifications

General

Engine Type	Inline-4
Fuel System	EFI (Electronic Fuel Injection)
Valvetrain	DOHC, 4 valves per cylinder
Bore x Stroke	81.0 mm x 77.0 mm
Compression Ratio	9.5:1
Fuel Type	Gasoline
Displacement	1587 cm3
Power Output	115 hp (86 kW) @ 6000 rpm
Redline	6, 400–6, 800 rpm