Toyota Land Cruiser 1988 Repair Manual page 149

Fl-18 EFI SYSTEM -Troubleshooting
SYMPTOM- MUFFLER EXPLOSION (AFTER FIRE}-
Rich Fuel Mixture-Misfire
CHECK DIAGNOSIS SYSTEM Diagnostic code(s) (See pages Fl-24, 25)
Check for output of diagnostic code. Malfunction
(See page Fl-21) code(s)
!
Normal code
CHECK IGNITION TIMING
Ignition timing- Adjust (See page IG-11)
1 . Short terminals TE1 and E1 of the NO
check connector.
2. Check ignition timing.
Standard:
7o
BTDC @ idle
(w/ short circuited
TE1 and E1)
!
OK
.
CHECK COLD START INJECTOR 1. Cold start injector (See page FJ-52)
(See page Fl-52) BAD 2. Cold start injector time switch
(See page Fl-76)
!
OK
CHECK FUEL PRESSURE
Fuel pressure regulator (See page Fl-55)
(See page Fl-47) BAD
!
OK
CHECK INJECTORS (See page Fl-57)
I BAD L
Injectors- Leakage
~OK
CHECK SPARK PLUGS 1. Spark plugs
Plug gap:
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)
Standard: IN 0.20 mm (0.008 in.)
EX 0.35 mm (0.014 in.)
!
OK
CHECK EFI ELECTRONIC CIRCUIT 1. Throttle position sensor
USING VOLT /OHMMETER BAD 2. Injection signal circuit
(See page Fl -27) (1) Injector wiring
(2) Fuel cut RPM (See page Fl-85)
(3) ECU (See page Fl-82)
3. Oxygen sensors (See page Fl-80) ·