Toyota Land Cruiser 1988 Repair Manual page 142

EFI SYSTEM - Troubleshooting
~OK
CONTINUED FROM PAGE Fl-10
CHECK SPARK PLUGS
1----_....,
1. Spark plugs
Standard: 0.8 mm (0.031 in.) NO 2. Compression pressure
NOTE: Check compression pressure and Minimum: 8.0 kg/cm
2
valve clearance if necessary. (114 psi, 785 kPa)
at 200 rpm
3. Valve clearance (Hot)
Fl-11
Standard: IN 0.20 mm (0.008 in.)
EX 0.35 mm (0.014 in.)
CHECK FUEL SUPPLY TO INJECTOR
1 . Fuel in tank
2. Fuel pressure in fuel line
(1) Short terminals
+
B and FP of the
check connector.
(2) Fuel pressure at fuel hose of fuel
filter can be felt. (See page Fl-47)
CHECK FUEL PUMP SWITCH IN AIR
FLOW METER
Check continuity between terminals FC
and E1 while measuring plate of air flow
meter is open.
~OK
t - - - - - - a o i
1. lnjector(s) -shorted or leaking
BAD
(
All )
Plugs
WET
2. Injector wiring -short circuited
3. Cold start injector - leakage
(See page Fl-52)
4. Cold start injector time switch
(See page Fl-76)
t----~
1. Fuel line - Leakage - deformation
BAD 2. Fuse
3. Fuel pump (See page Fl-46)
4. Fuel filter
5. Fuel pressure regulator (See page Fl-55)
1 - - - - - - 1
Air flow meter (See page Fl-66)
BAD
CHECK IGNITION TIMING
t - - - - - - a o i
Ignition timing- Adjust (See page IG-11)
1. Short terminals TE1 and E1 of the check
connector.
2. Check ignition timing.
Standard: 7"BTDC @ idle
(w/ short circuit TE1
and E1)
CHECK EFI ELECTRONIC CIRCUIT
USING VOLT /OHMMETER
(See page Fl-27)
NO
1----_..,..
1. Wiring connection
BAD 2. Power to ECU
(1) Fusible links
(2) Fuses
(3) EFI main relay (See page Fl-74)
3. Air flow meter (See page Fl-66)
4. Water temp. sensor (See page Fl-77)
5. Air temp. sensor (See page Fl-66)
6. Injection signal circuit
(1) Injector wiring
(2) ECU (See page Fl-82)