Toyota 4A-FE Repair Manual page 95

Fl-24 EFI SYSTEM - Troubleshooting
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!
OK
CONTINUED FROM PAGE Fl-23
CHECK AIR FILTER ELEMENT
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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)
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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)
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;
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)
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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
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