Toyota Land Cruiser 1988 Repair Manual page 155

Fl-24 EFI SYSTEM - Diagnosis System
DIAGNOSTIC CODES
Code
Number of
See
Check engine System Diagnosis Trouble area
No.
blinks
page
-
__fUl_fU1Jl_
Normal
This appears when none of
-
-
the other codes are identified.
Fl1604
•
Ignition switch circuit
___1l_fL__
Momentary interruption in
•
Ignition switch
11
ECU (+B)
power supply to ECU.
•
Main relay circuit Fl-30
•
Main relay
Fl1605
• ECU
No "NEn or "G" signal to
•
Distributor circuit
____IUUl___
•
Distributor
12
PRM Signal ECU within 2 seconds after
Starter signal circuit
IG-4
engine has been cranked.
•
Fl1606
• ECU
No "NE" signal to ECU
•
Distributor circuit
13
____Il_fUUl_
RPM Signal
when engine speed is
•
Distributor
-
above 1 ,000 rpm.
•
ECU
F11607
• Igniter and ignition coil
14
~
Ignition
No "IGF" signal to ECU circuit
Fl-41
Signal
6 - 8 times in succession. • Igniter and ignition coil
Fl1608
•
ECU
Oxygen
Detects deterioration of
• Oxygen sensor circuit
Sensor • Oxygen sensor
Signal
oxygen sensor.
•
ECU
__n_n_n__
Fl-44
21
Oxygen
• Oxygen sensor heater
Open or short circuit in circuit
Sensor
oxygen sensor heater. • Oxygen sensor heater
Heater Signal
•
ECU
Fl1609
• Water temp. sensor
22
__nn__n_n_
Water Temp.
Open or short circuit in water circuit
Fl-37
Sensor Signal temp. sensor signal.
•
Water temp. sensor
Fl1610
•
ECU
Intake Air
• Intake air temp. sensor
24
_fl.fU1.flf1Jl_
Temp. Sensor
Open or short circuit in intake circuit
Fl-36
Signal
air temp. sensor signal.
•
Intake air temp. sensor
Fl1611
•
ECU
{1) When air-fuel ratio feed-
• Injector circuit
back compensation value
•
Injector
or adaptive control value
•
Fuel line pressure
__fU1_fU11l.fUL
Air-fuel
continues at the upper
• Air flow meter
25
Ratio Lean
(lean) or lower (rich) limit
• Air intake system
-
renewed for a certain.
Malfunction
•
Oxygen sensor circuits
(2) When air-fuel ratio feed-
•
Oxygen sensors
back compensation value
•
Ignition system
or adaptive control value
•
ECU
Fl2562
feedback frequency is
abnormally high during
Injector circuit
feedback condition.
•
Air-fuel NOTE: For condition (2),
•
Injector
26
__flfLflfUlflfl
Ratio Rich since neither a lean (Code
•
Fuel line pressure
• Air flow meter
-
Malfunction No. 25) nor a rich (Code No.
• Cold start injector
26) diagnosis displayed
•
ECU
Fl2563
consecutively.
No.2 Oxygen
28 __M_flfU1.fUUlM
Sensor Signal
No.2 Oxygen
Same as code No. 21 Same as code No. 21 Fl-44
FI269S
Sensor Heater