Toyota 4A-FE Repair Manual page 99

Fl-28 EFI SYSTEM - Diagnosis System
DIAGNOSTIC CODES (4A-FE)
Code
Number of
See
No.
blinks System Diagnosis Trouble area
"CHECK ENGINE"
page
~N
This appears when none
~J
-
Normal of the other codes are
-
OFF
identified
Fn401
• Distributor U\A) circuit
No "NE" or "G" signal to
• Distributor
OJA)
12
_flllrL
PRM Signal ECU within 2 seconds after
• Starter signal circuit
the engine is cranked.
• Igniter circuit
• Igniter
IG-4
F11389
• ECU
• Distributor
(llA)
circuit
No "NE" signal to ECU
• Distributor (llA)
13
_fUUUl
RPM Signal When the engine speed is
• Igniter circuit
above 1,000 rpm .
• Igniter
F11390
• ECU
No "IGF" signal to ECU
• Igniter circuit
Fl-48
14
__fUUUlJL
Ignition Signal
4 times in succession.
• Igniter
Fl-62
Fl1391
• ECU
-
During air-fuel ratio feedback
correction. voltage output
Oxygen from the oxygen sensor does
• Oxygen sensor circuit
Sensor not exceed a set value on the
""
Heater
lean side and the rich side
• Oxygen sensor
·2,
_jlJl_JL
continuously for a centain
Fl-50
period.
Fl-64
Oxygen
• Oxygen sensor heater
Open or short circuit in circuit
Sensor
oxygen sensor heater (HT). • 0
xygen sensor heater
Heater
Fll400
• ECU
-
• Water temp. sensor
22
__flJlJlJL
Water Temp. Open or short circuit in water circuit Fl-46
Sel'\Sor temp. sensor signal {THW). • Water temp. sensor
Fl-60
F11392
• ECU
Intake air
• Intake air temp. sensor
24
_Jlil_\lllfill
Temp. Sensor
Open or short circuit in intake circuit Fl-45
air
temp. sensor signal (THA). • Intake air temp. sensor Fl-59
Signal
• ECU
Fil 6 \ \
Air- fuel
·25
_IUUUU1llJl_
Ratio lean
When air-fuel ratio fe.edback
Malfunction
correction value cotinues at
• Oxygen sensor circuit
Fl-50
F12562
• Oxygen sensor
Air-fuel
the upper (lean) limit for a
• ECU
Fl-64
·25
_fllUIJINIJ;;;;,I Ratio Rich
certain period of time.
Malfunction
•: w/ EGR System only