Engine Often Stalls - Toyota 7M-GE Repair Manual

l-16
EFI SYSTEM - Troubleshooting
SYMPTOM
- ENGINE OFTEN STALLS
CHECK DIAGNOSIS SYSTEM
Check for output of diagnostic code.
(See page Fl-26)
* Diagnostic code(s) (See pages FI-30, 31, 32)
Malfunction
code(s)
Normal code
CHECK FOR VACUUM LEAKS IN AIR
INTAKE LINE
BAD
1. Oil filler cap
2. Oil level gauge
3. Hose connections
4. PCV hose
I
OK
CHECK FUEL SUPPLY TO INJECTOR
'*-- Fuel in tank
BAD
L. Fuel pressure in fuel line
(1) Short terminals +B and FP of the check
connector.
(2) You can feel fuel pressure in fuel
return hose.
.
3. Check circuit opening relay
(See page FI-113)
.
1. Fuel line - leakage - deformation
2. Fuse
3. Fuel.pump page FI-73)
4. Fuel filter
5. Fuel pressure regulator (See page FI-84)
6. Circuit opening relay (See page FI:1 13).
,
OK
CHECK AIR FILTER
I
BAD
Element - Clean or replace
OK
CHECK IDLE SPEED
STD: 7M-GE
wl TWC 700 rpm
7M-GE
w/o TWC 800 rpm
7M-GTE
800 rpm
t
w
BAD
ISC system
(I 1 Wiring connection
(21 ISC valve
(3) ECU
CHECK IGNITION TIMING '-
'I. Short terminals TiMA) or TEl (MS) and
El of the check connector..
2. Check ignition timing.
STD: 10" BTDC @ Idling
short circuited T(MA) or
1
OK
CHECK SPARK PLUGS
Plug gap:
7M-GE
Conventional Tipped Type
0.8 mm (0.031 in.)
7M-GE
Platinum Tipped Type
1.1 mm (0.043 in.)
7M-GTE
0.8 mm (0.031 in.)
NOTE: Check compression pressure and
-I------- :+ -nyrpCCpn,
c
NO
-I-
BAD -
Adjust ignition timing. (See page EM-1 7)
1. Spark plugs
2. Compression pressure
Limit: 9.0 kg/cm2 (128 psi, 883 kPa)
at 250 rpm
3. Valve clearance (Cold)
STD: IN 0.15 - 0.25 mm
(0.06 - 0.010 in.)