Toyota 4A-FE Repair Manual page 88

EFI SYSTEM - Troubleshooting Fl-17
SYMPTOM - ENGINE OFTEN STALLS
CHECK DIAGNOSIS SYSTEM Diagnostic code(s)
Check for output of diagnostic code. Malfunction 4A-FE (See page Fl-28)
(See page Fl-25) code(s) 4A-GE {See page Fl-29)
i
Normal code
CHECK FOR VACUUM LEAKS IN AIR
--
1. Oil diostick
INTAKE LINE
BAD 2. Hose connection(s)
3. PCV hose(s)
4. EGR system - EGR valve stays open
~
OK
CHECK FUEL SUPPLY TO INJECTOR 1. Fuel line - leakage - deformation
1. Fuel in tank
BAD
2. Fuse(s)
2. Fuel pressure in fuel line 3. Circuit opening relay (See page Fl-135)
(1) Connect terminals +B and FP of the
4. Fuel oumo (See page Fl-94)
check connector.
5. Fuel
filter
(2)
Fuel pressure at fuel hose of fuel
6. Fuel prnss11re regulator
filter. (See page Fl-95}
(See oage Fl-109)
i
OK
CHECK AIR FILTER ELEMENT Element - Clean or replace
~
OK
BAD
CHECK IDLE SPEED (AND IDLE CO - Idle speed - Adjust
CONCENTRATION) NO 4A-FE (See pages EM-22, 23)
Standard: 800 rpm
4A-GE (See pages EM-30, 31)
i
OK
CHECK IGNITION TIMING
Ignition timing - Adjust
1. Connect terminals TE 1 and E1 of the NO 4A-FE (See page EM-20)
check connector.
4A-FE (See page EM-28)
2. Check ignition timing.
Standard:
10° BTDC@ idle
i
OK
CHECK SPARK PLUGS
-
1. Spark plugs
Standard:
0.8
mm
(0.031 in.)
NO
2. Compression pressure
HINT:
Check compression pressure and
Minimum:
10.0
kg/cm
2
valve clearance if necessary.
(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.)
-· !
OK
CHECK COLD START INJECTOR
-
1. Cold start injector
(See page Fl-1 05) BAD 2. Start injector time switch
(See page Fl-13 7)
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OK
CONTINUED ON PAGE Fl-18